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The acceptability of waiting times for elective general surgery and the appropriateness of prioritising patients
© Oudhoff et al; licensee BioMed Central Ltd. 2007
Received: 28 September 2006
Accepted: 28 February 2007
Published: 28 February 2007
Problematic waiting lists in public health care threaten the equity and timeliness of care provision in several countries. This study assesses different stakeholders' views on the acceptability of waiting lists in health care, their preferences for priority care of patients, and their judgements on acceptable waiting times for surgical patients.
A questionnaire survey was conducted among 257 former patients (82 with varicose veins, 86 with inguinal hernia, and 89 with gallstones), 101 surgeons, 95 occupational physicians, and 65 GPs. Judgements on acceptable waiting times were assessed using vignettes of patients with varicose veins, inguinal hernia, and gallstones.
Participants endorsed the prioritisation of patients based on clinical need, but not on ability to benefit. The groups had significantly different opinions (p < 0.05) on the use of non-clinical priority criteria and on the need for uniformity in the prioritisation process.
Acceptable waiting times ranged between 2 and 25 weeks depending on the type of disorder (p < 0.001) and the severity of physical and psychosocial problems of patients (p < 0.001). Judgements were similar between the survey groups (p = 0.3) but responses varied considerably within each group depending on the individual's attitude towards waiting lists in health care (p < 0.001).
The explicit prioritisation of patients seems an accepted means for reducing the overall burden from waiting lists. The disagreement about appropriate prioritisation criteria and the need for uniformity, however, raises concern about equity when implementing prioritisation in daily practice.
Single factor waiting time thresholds seem insufficient for securing timely care provision in the presence of long waiting lists as they do not account for the different consequences of waiting between patients.
Over the last decades waiting lists for elective surgery have become a common feature of health care systems that are centrally organized and publicly funded. Although waiting lists can serve a purpose in rationing scarce resources, overly long delays of necessary treatment can have widespread negative consequences  and threaten the principles of providing timely and equitable access to care. Consequently, responsible health authorities have attached high importance to addressing problematic waiting times, amongst others in the United Kingdom, New Zealand, Canada, Sweden, and the Netherlands. Key initiatives that have been issued include the prioritisation of the patients on waiting lists [2–4] and the setting of maximal waiting time guarantees [5–10]. Despite the clear and shared purpose of these measures, it is unclear whether they adequately secure equity and timeliness in care provision, as empirical evidence to guide policy decisions in this area is often scarce or lacking.
The prioritisation of patients on the waiting list is intended to diminish the burden of waiting lists . The far-reaching and diverse consequences of waiting lists, however, provide various medical, social, financial, and legal arguments to prioritise a patient. Several reports accordingly indicate that priority is assigned on the basis of a variety of clinical and non-clinical factors including personal preferences [12–19]. While uniform criteria for prioritisation are supported and adopted in some countries [4, 5], there is still little evidence on the acceptance and equity of explicit prioritisation and on the ethical basis and the criteria that are considered appropriate for assigning priority.
Maximal waiting time guarantees for clinical treatment are a pragmatic means to secure timely care provision and to keep the consequences of waiting acceptable. The thresholds that are currently used, however, show a wide range and seem to be set rather arbitrarily. Whilst waiting time guarantees range between 3 and 6 months in the UK , Sweden , and New Zealand , the Dutch government, following a joint proposal of several medical organisations, set the maximum waiting time target for hospital treatment to 7 weeks, whereas 80% of the patients should be treated within 5 weeks . These apparent differences in waiting time cut-off point, signify that most cut-off points are set fairly arbitrarily and it raises the question which waiting time thresholds would signify timely access to care and could from that viewpoint be deemed acceptable.
the general acceptability of waiting lists for hospital care;
the fairness of clinical prioritisation, and the appropriate ethical basis and methods for it;
the acceptability of priority care based on non-clinical factors; and
the maximally acceptable waiting times and their determinants for patients on elective surgical waiting lists.
Concerning the latter aspect our study focuses on waiting times for elective surgery for varicose veins, inguinal hernia, and gallstones. These three procedures were selected as they are known for lengthy waiting times within general surgery which comprises approximately 20% of the patients on hospital waiting lists [19–21].
While surgeons, OPs and GPs are all directly involved in the care delivery for surgical patients they clearly have different roles in it. Their specialties make them encounter slightly different patient populations on a daily basis. It can be expected these factors result in differences in their views on the appropriateness of criteria for prioritisation and on the acceptability of waiting times. With regard to prioritisation criteria it can therefore be hypothesised that the surgeons' primary role of restoring the patient's physical function will make them focus relatively more on these medical aspects. OPs, being responsible for the patient's return to work, may attach more importance to interferences with work when prioritising. For GPs, as generalists, and patients themselves a less distinct preference might be expected.
The patient populations seen by the different groups of doctors are likely to provide a frame of reference regarding judgements concerning the urgency of patients and the subsequent maximally acceptable waiting times. Accordingly, surgeons, who encounter proportionally more patients with more severe conditions than GPs and OPs, could find somewhat longer waiting times acceptable for the elective patient groups in the study. On a similar note, the patient groups, most directly affected by waiting, may be expected to be the least willing to find waiting acceptable.
Three samples of 132 former patients who had been on a waiting list for surgical treatment of varicose veins, inguinal hernia, and gallstones respectively. These were randomly drawn from the participants in an earlier cross-sectional study on the consequences of waiting for surgery which started in mid 2001 and continued throughout 2002 . The participants in that study were recruited from the waiting lists of 27 Dutch hospitals and appeared to be representative for the population of patients on hospital waiting lists for the 3 conditions of concern. Median waiting times these patients encountered were: 24 weeks for varicose vein surgery, 16 weeks for inguinal hernia surgery and 16 weeks for surgery for gallstones .
A random sample of 200 surgeons (including trainees) derived from the registration of practising members of the Association of Surgeons of the Netherlands. Membership is held by the vast majority (> 90%) of surgeons practising in the Netherlands.
Random samples of respectively 200 practising GPs, and 200 practising OPs derived from the registration and information division of the Royal Dutch Medical Association. These registrations contain all GPs and OPs practising in the Netherlands.
Sample sizes were determined on the basis of population size for the different groups of doctors (between 1000 and 2000) which were taken to require 80 to 100 persons per group to ensure a sufficient precision level for the purposes of our survey . Based on previous experiences, response rates among patients were expected to be slightly higher.
Study design and questionnaires
The questionnaire comprised two parts in addition to questions pertaining to sociodemographic details (e.g. age, sex, profession, and practice form (for doctors)). The first part of the questionnaire consisted of a list of statements that addressed ethical and practical aspects that emerged as important from literature and the public debate on waiting lists of the following topics: the general acceptability of waiting lists for hospital care (4 statements, see Results, Table 4); the fairness of clinical prioritisation (1 statement, see Results, Table 5) and the appropriate ethical basis (2 statements, see Results, Table 5) and methods for it (2 statements, see Results, Table 5); and the acceptability of priority care based on non-clinical factors (6 statements, see Results, Table 6). Participants were asked to indicate the degree to which they agreed with each statement on a 5-point scale: fully disagree/disagree to some extent/neutral/agree to some extent/fully agree. We computed mean scale scores from the participants' responses to assess their general attitude on two of the topics: the acceptability of waiting lists for hospital care (Cronbach's α = 0.74) and the acceptability of priority care based on non-clinical factors (Cronbach's α = 0.78). Deleting any of the items did not result in improvements of Cronbach's α of either scale. With 'neutral' coded as zero, the mean scale scores can range between -2 and 2.
The characteristics and their levels used to construct the vignettes of patients.
dislikes cosmetic appearance of varicose veins
suffers occasionally from a feeling of heaviness in the leg
suffers often from a feeling of heaviness and pain in the leg
a visible swelling during straining activities but no pain
a nagging pain, occasionally
continuous nagging sensations but also often severe pain
less than 1 colic attack per month
1 to 2 colic attacks per month
2 colic attacks per week
somewhat worried about the symptoms and what might happen while waiting
highly worried about the symptoms and what might happen while waiting
no limitations during usual social activities
some limitations during usual social activities
not able to perform usual social activities
Impairments in work
still able to work fully
has to skip work partially (partially on sick leave)
not able to perform job anymore
The composition of the nine vignettes by the levels of each characteristic*.
Impairments in work
To keep the number of appraisals manageable, each participant was presented with a randomly selected set of vignettes concerning two of the three studied disorders. Questionnaires for patients always included the vignettes on the disorder for which they had been on a waiting list. When patients appraised the vignettes concerning the other disorder, they were deemed to be laypersons. The order in which the disorders were presented in the questionnaire was varied randomly among participants. Variation was also applied to the order in which the vignettes of each disorder were presented.
The two parts of the questionnaire were presented to the participants as follows: firstly 9 vignettes of one disorder, then the list of statements, and finally the 9 vignettes of the second disorder.
Draft versions of the questionnaire were piloted among members of the general public and surgeons to test for completeness and comprehensibility.
The study was approved by the medical ethics committee of the VU University Medical Centre
To assess differences between the responses of groups to each statement and between the two mean scale scores we used Mann-Whitney tests and t-tests respectively. SPSS 10.1 was used for these analyses.
The judgements on acceptable waiting times for the vignettes of patients were analysed in two ways. Firstly, descriptive statistics were used to assess the minimum and maximum waiting times from the set of nine responses each participant provided per disorder. In the results section, these minimum and maximum responses are reported as the maximally acceptable waiting times for the vignettes to which the participant ascribed the highest urgency (shortest waiting time) and lowest urgency (longest waiting time) respectively.
Secondly, we performed multilevel ordered proportional odds regression analysis  of all responses to assess which factors influenced the participants' judgements on maximally acceptable waiting times for the vignettes (MLWiN 2.0 , estimation procedure: Markov chain Monte Carlo). For this analysis we recoded the responses into 6 categories: 2/5/7/10/15–20/and > 20 weeks. To address both the possible intra- and the interindividual variation in analysing the responses we used the following independent (explanatory) variables: the disorder and the levels of the 4 characteristics in the vignettes, the response group, and the participant's mean score for the scale reflecting the general attitude on the acceptability of waiting lists in health care. The latter variable was included in the analysis to see whether the judgements on a patient's urgency might go beyond a judgement of clinical severity and instead reflect the individuals' personal opinions towards the existence of waiting lists in themselves. This was deemed relevant given the highly elective nature of surgery for the conditions in our study. Possible effects arising from the study design (e.g. the order in which the disorders were presented) were corrected for if significant. Wald χ2 tests were used to assess whether the effect of independent variables on the judgements on maximally acceptable waiting times was statistically significant (p < 0.05).
Response numbers and demographic details of the participants.
Surgeons (30.3% trainee)
The acceptability of waiting lists in health care (Table 4)
Grouped responses on the statements on the acceptability of waiting lists in health care (%, and mean scale scores).
n = 255
n = 99
n = 93
n = 63
Waiting lists are an accepted part of an affordable health care service that is accessible for everyone.
Since patients pay premiums for care, they should be given that care without having to wait.
Having to wait longer than two weeks for treatment is never acceptable.
It is acceptable to have waiting lists even in a country as prosperous as the Netherlands.
Scale scores for attitude towards the acceptability of waiting lists in health care
The fairness of clinical prioritisation and the appropriate ethical basis and methods for it (Table 5)
Grouped responses (%) on the statements on the fairness of prioritisation, and the appropriate ethical basis and methods for it.
n = 255
n = 99
n = 93
n = 63
Assigning priority to certain groups of patients on the waiting list is always unjustifiable.
If a patient has demonstrably more complaints as a result of an illness, he/she must be given priority.
A patient should be given priority if it is expected that he/she will benefit more from the treatment than another patient.
If certain patients are given priority, this can only be done in compliance with a nationally agreed system.
If it is allowed to prioritise patients, this works best if the physician can determine by him/herself which patients are given priority
The opinions about the possible methods of prioritisation showed that the surgeons had a different view on this than the other three groups. While most surgeons (73%) considered it best to leave the decisions on priority to the individual doctor, the patients (55%), the OPs (59%), and the GPs (62%) favoured a nationally agreed system for prioritising patients.
Priority care on the basis of non-clinical factors (Table 6)
Grouped responses on the statements on the acceptability of priority care based on non-clinical factors (%, and mean scale scores).
n = 255
n = 99
n = 93
n = 63
If a patient is given priority, this can only be done for medical reasons.
It must be possible to be operated earlier by paying extra (for example, in a private clinic)
Patients who occupy a high social position may be treated with priority.
A physician is allowed to give priority to personal friends and acquaintances or hospital staff on the waiting list.
Patients who are employed should be allowed to be given priority over patients who are not in paid employment.
An employer should be allowed to negotiate a financial agreement enabling an employee to be operated earlier.
Scale score for attitude towards priority care based on non-clinical factors
Maximally acceptable waiting times
Results from multilevel proportional odds regression analysis of the judgements on maximal waiting times for the vignettes of patients.
5.1 (df = 4, p = 0.281)
Patients (reference category)
0.99 – 1.23
0.77 – 1.61
1.25 – 3.22
0.72 – 2.41
1539.3 (df = 2, p < 0.001)
Varicose veins (reference category)
4.98 – 6.21
9.01 – 11.46
1275.9 (df = 2, p < 0.001)
Level = 1 (reference category)
Level = 2
1.77 – 2.09
Level = 3
5.73 – 6.86
114.9 (df = 2, p < 0.001)
Level = 1 (reference category)
Level = 2
1.39 – 1.69
Level = 3
1.50 – 1.82
276.0 (df = 2, p < 0.001)
Level = 1 (reference category)
Level = 2
1.40 – 1.70
Level = 3
2.08 – 2.56
Impairments in work
1532.8 (df = 2, p < 0.001)
Level = 1 (reference category)
Level = 2
3.47 – 4.15
Level = 3
6.97 – 8.44
Attitude towards the acceptability of waiting lists in health care
34.4 (df = 1, p < 0.001)
0.45 – 0.66
Maximally acceptable waiting time
≤ 2 weeks
≤ 5 weeks
≤ 7 weeks
≤ 10 weeks
≤ 20 weeks
> 20 weeks (reference category)
Long waiting lists for public health care services conflict with securing the principles of providing equitable and timely access to needed care. Most doctors in our study indicate that waiting lists could be an acceptable part of health care. The doctors especially agreed that waiting lists would not be irreconcilable with timely care. Responses on the other statements were more disparate. Patients seem on average less inclined to accept waiting lists in health care. On most statements the responses of patients show that opinions are divided about whether waiting lists are an acceptable entity in health care, indicating that on average waiting lists might certainly not be completely unacceptable. Only the statement that swift access to care should be provided because care is funded by their money did receive some more agreement among patients. This being an important argument against the acceptability of waiting lists clearly fits with the patients' consumer role in health care.
The prioritisation of patients on the waiting list is often advocated as a means to diminish the net burden from waiting lists . In accordance with this, large majorities of each group in our study endorse the prioritisation of patients on the basis of clinical need. Conversely, only a small majority of OPs approve of prioritising patients based on ability to benefit, while patients, surgeons, and GPs show ambivalence or disapproval in this regard. This result contrasts with studies by Edwards et al. and Ridderstolpe et al. who found that the anticipated benefit should influence patient priority according to GPs, consultants, the general public, and health authority commissioners  and according to the opinions of physicians on priority setting in cardiac surgery . These conflicting findings may be illustrative as the explicit use of ability to benefit for determining priority has also caused debate in New Zealand for it allegedly would contravene a just distribution of resources . This controversy indicates that policy decisions on prioritisation require an explicit outline of the purpose and principles it should serve.
Regarding the practical implementation of prioritisation, patients, GPs, and OPs show a strong preference for explicitness and clarity on the process by favouring a system based on nationally agreed criteria. Surgeons on the other hand seem to prefer individual ownership over the process of prioritisation. This preference for individual responsibility may arise from concern about fallacies in the accuracy and sensitivity of systematic priority scoring tools in clinical practice which have been shown to exist [32, 33]. Disapproval of imposed uniform criteria which have not proved to meet their purpose will likely provide a basis for gaming. It is therefore important that consensus need to be sought over which method for prioritisation is both deemed appropriate and can meet the desire for explicitness and transparency.
Preferential treatment for non-clinical reasons is controversial for it may conflict with fairness in care provision . However, it has been shown to occur in practice and it can for instance contribute to reducing the costs of waiting times . This ambiguousness may be reflected in our finding that surgeons and OPs show acceptance towards certain forms of preferential care, whereas patients and GPs generally disapprove of it. The found approval of preferential treatment among the surgeons and OPs is strongest for the aspects that either match their role or fall within a domain they control. This approval might thus either come from their expertise and experience or it might reflect the desire for individual ownership over prioritisation issues. Whereas the latter would likely entail arbitrariness in prioritisation, it seems necessary for health authorities to set clear guidelines on which non-clinical factors may and which may not be used for assigning priority.
In concordance with the approval of prioritisation based on clinical need, the waiting times that were deemed maximally acceptable differed widely depending on the disorder and the severity of the problems described in the patient vignettes. The average waiting times for the three disorders ranged from 2 to 7 weeks in case of severe symptoms and from 15 to 25 weeks for patients with few symptoms. Whereas other studies looking at the opinions of patients and doctors on acceptable waiting times for the patient groups in our study are lacking, studies on the patients' and doctors' views on maximum waits for hip and knee arthroplasty  and cataract surgery  show similar distinctions in the acceptable waiting times for patients with different symptom status. This diversity in acceptable waiting times obviously challenges the sufficiency of a single waiting time threshold to guarantee high quality health care.
Strikingly, the survey groups in our study had overall similar opinions on which waiting times would be maximally acceptable, regardless of their role in care delivery. This consensus indicates that a solid ground exists for defining timeliness of care between the different parties in the health care setting. Within each group, however, there was considerable variation in responses, especially when patient vignettes were deemed non-urgent. This inter-individual variation seems to be related to different opinions on the general acceptability of waiting lists in health care. Maximal waiting time guarantees may therefore need to reflect a gradient of appropriate waiting times which start at existing evidence on the clinical consequences of waiting and end at consensus over the timeliness of care according to local socio-medical culture.
In general, we consider the response numbers in our study to be acceptable, yet the response rate among GPs and OPs raises concern. The relatively long questionnaire and the fact that GPs and OPs will deal with surgical waiting lists less often than the surgeons themselves are factors that might have contributed to this lower response rate. The comparison with national statistics on basic demographics did not suggest that response was skewed in any particular direction. Also the diversity in opinions among GPs and OPs do not suggest that respondents represented a specific subgroup with a view on waiting lists. Yet it is unclear whether other differences between responders and non-responders were present. Some caution may thus be justified when drawing conclusions for these two groups.
The statements we used in our study reflected issues that emerged as important from the debate on waiting lists. Some statements may have addressed issues that apply to the Dutch health care setting but are less important elsewhere. Especially views on the acceptability of avoiding long waiting times in return for extra payment may be different in countries where private health care is common and such options hence already exist. In addition there is a possibility that some statements might have been open to differences in interpretation. Especially the question on prioritising acquaintances referred to both private friends and hospital personal. Although the principal behind this form of prioritisation might be the same, respondents may view these as distinctively different groups.
We used patient vignettes to be able to study the opinions on acceptable waiting times among a substantial number of persons of different backgrounds. We designed these vignettes on the basis of the outcomes of a study on the consequences of waiting among patients. Still, the vignettes are a simplified and abstract representation of real patients, which may have influenced the appraisals on acceptable waiting times.
Patients, surgeons, OPs, and GPs support the prioritisation of patients based on clinical need and agree that it would not violate equity in care provision. Their views are, however, less univocal on the best method for determining priority and the acceptability of preferential treatment on non-clinical grounds. On both issues there seems to be a group who prefer individual responsibility and autonomy in care provision which can be accurate but may involve arbitrariness, while others desire uniformity and explicitness to secure equity in prioritisation. The implementation of prioritisation will therefore require either consensus on where these two diverse preferences can meet or decisions on which preference is deemed appropriate and valued highest.
Patients and doctors generally have similar opinions on which waiting times are maximally acceptable for elective surgical patients. Decisions on acceptable waiting times depend on the individual's acceptance of waiting lists in health care and the consequences of waiting for a patient. Timeliness in care provision may therefore need maximal waiting time guarantees that reflect socio-medical culture and account for the differences between patients.
Example of a vignette.
Miss Anchor suffers occasionally from a feeling of heaviness in the leg especially after standing for a while.
• suffers occasionally from a feeling of heaviness in the leg
Miss Anchor, 48 years of age, consults the surgeon. She recently visited the GP for varicose veins.
She is highly worried that the symptoms will increase or that the varicose veins will enlarge during the wait and that surgery will not be effective than.
• is highly worried about the symptoms and what might happen while waiting
Miss Anchor encounters some limitations during social activities. She normally is a highly active member of a choral group, but she now has to cancel that regularly. She also visits her friends and family less frequently than normal.
• has some limitations during usual social activities
Miss Anchor is still able to work fully. The varicose veins do not interfere with her job in an employment agency.
• is still able to work fully
Below you find several possible waiting times.
Waiting times questionnaire
Below you find several possible waiting times. Which waiting time do you consider maximally acceptable for miss Anchor?
O unlimited waiting time
O 30 weeks
O 10 weeks
O 52 weeks
O 25 weeks
O 7 weeks
O 40 weeks
O 20 weeks
O 5 weeks
O 35 weeks
O 15 weeks
O 2 weeks
- Hilkhuysen GLM, Oudhoff JP, Rietberg M, van der Wal G, Timmermans DRM: Waiting for elective surgery: a qualitative analysis and conceptual framework on the consequences of delay. Public Health. 2005, 119: 290-293. 10.1016/j.puhe.2004.05.020.View ArticlePubMedGoogle Scholar
- Health Policy and Economic Research Unit, British Medical Association: Waiting list prioritisation scoring systems: a discussion paper. 1998, London, British Medical AssociationGoogle Scholar
- Hadorn DC, Holmes AC: The New Zealand priority criteria project, Part 1: overview. BMJ. 1997, 314: 131-134.View ArticlePubMedPubMed CentralGoogle Scholar
- Taylor MC, Hadorn DC, and the Steering Committee of the Western Canada Waiting List Project: Developing priority criteria for general surgery: results from the Western Canada Waiting List Project. Can J Surg. 2002, 45: 351-357.PubMedPubMed CentralGoogle Scholar
- Department of Health: The NHS plan. A plan for investment. A plan for reform. London. 2002Google Scholar
- Hanning M, Winblad Spangberg U: Maximum waiting time guarantee – a threat to clinical freedom? Implementation of a policy to reduce waiting times. Health Policy. 2000, 52: 15-32. 10.1016/S0168-8510(00)00060-9.View ArticlePubMedGoogle Scholar
- Hanning M: Maximum waiting time guarantee – an attempt to reduce waiting lists in Sweden. Health Policy. 1996, 36: 17-35. 10.1016/0168-8510(95)00791-1.View ArticlePubMedGoogle Scholar
- MacCormick AD, Parry BR: Waiting time thresholds: are they appropriate?. ANZ J Surg. 2003, 73: 926-928. 10.1046/j.1445-2197.2003.02835.x.View ArticlePubMedGoogle Scholar
- Wait Time Alliance Canada: No more time to wait. Toward benchmarks and best practices in wait-time management. An interim report by the Wait Time Alliance Canada. 2005, [http://www.cma.ca/index.cfm/ci_id/43436/la_id/1.htm]Google Scholar
- Treekoverleg: Notice of norms for waiting times to strive for in curative care. [In Dutch] Zeist. 2000Google Scholar
- Derrett S, Devlin N, Harrison A: Waiting in the NHS, part 2: a change of prescription. J R Soc Med. 2002, 95: 280-283. 10.1258/jrsm.95.6.280.View ArticlePubMedPubMed CentralGoogle Scholar
- de Gruyter R: Priority care without clinical need. [In Dutch] Medisch Contact. 2003, 58: 204-207.Google Scholar
- Arnesen KE, Erikssen J, Stavem K: Gender and socioeconomic status as determinants of waiting time for inpatient surgery in a system with implicit queue management. Health Policy. 2002, 62: 329-341. 10.1016/S0168-8510(02)00052-0.View ArticlePubMedGoogle Scholar
- Bowling A, Bond M, McKee D, McClay M, Banning AP, Dudley N, Elder A, Martin A, Blackman I: Equity in access to exercise tolerance testing, coronary angiography, and coronary artery bypass grafting by age, sex and clinical indications. Heart. 2001, 85: 680-686. 10.1136/heart.85.6.680.View ArticlePubMedPubMed CentralGoogle Scholar
- Kee F, McDonald P, Kirwan JR, Patterson CC, Love G: The stated and tacit impact of demographic and lifestyle factors on prioritisation decisions for cardiac surgery. QJM. 1997, 90: 117-123. 10.1093/qjmed/90.2.117.View ArticlePubMedGoogle Scholar
- MacCormick AD, Collecutt WG, Parry BR: Prioritizing patients for elective surgery: a systematic review. ANZ J Surg. 2003, 73: 633-642. 10.1046/j.1445-2197.2003.02605.x.View ArticlePubMedGoogle Scholar
- Naylor CD, Levinton CM, Baigrie RS, Goldman BS: Placing patients in the queue for coronary surgery: do age and work status alter Canadian specialists' decisions?. J Gen Intern Med. 1992, 7: 492-498.View ArticlePubMedGoogle Scholar
- Shortt SED, Shaw RA: Equity in Canadian health care: does socio-economic status affect waiting times for elective surgery?. CMAJ. 2003, 168: 413-416.PubMedPubMed CentralGoogle Scholar
- Shortt SED: Waiting for medical care: is it who you know that counts?. CMAJ. 1999, 161: 823-824.PubMedPubMed CentralGoogle Scholar
- Anonymous: Quarterly statistics database for waiting times in general hospitals, 1st quarter 2003 through 1st quarter 2004. [In Dutch] Prismant, NVZ Nederlandse Vereniging van Ziekenhuizen. 2004Google Scholar
- DeCoster C, Carriere KC, Peterson S, Walld R, MacWilliam L: Waiting times for surgical procedures. Medical Care. 1999, 37: JS187-JS205. 10.1097/00005650-199906001-00016.PubMedGoogle Scholar
- Department of Health: accessed on 10/09/2005., [http://www.performance.doh.gov.uk/waitingtimes/2004/q1/kh07_y00.html]
- Oudhoff JP, Timmermans DRM, van der Wal G: Waiting for surgery. A study on the problems of patients on the waiting list for surgery of varicose veins, inguinal hernia, and gallstones. [In Dutch]. 2002, VU University Medical Centre, AmsterdamGoogle Scholar
- Israel GD: Determining Sample Size. 2002, University of Florida, IFAS, [http://edis.ifas.ufl.edu/PD006]Google Scholar
- Ryan M, Farrar S: Using conjoint analysis to elicit preferences for health care. BMJ. 2000, 320: 1530-1533. 10.1136/bmj.320.7248.1530.View ArticlePubMedPubMed CentralGoogle Scholar
- McCullagh P: Regression models for ordinal data (with discussion). J R Statist Soc Series B. 1980, 42: 109-142.Google Scholar
- Rasbach J, Steele F, Browne W, Prosser B: A user's guide to MlwiN version 2.0. 2003, Centre for Multilevel Modelling, Institute of Education, University of LondonGoogle Scholar
- (accessed on 29 November 2006), [http://www.nivel.nl]
- (accessed on 29 November 2006), [http://www.azwinfo.nl]
- Edwards RT, Boland A, Wilkinson C, Cohen D, Williams J: Clinical and lay preferences for the explicit prioritisation of elective waiting lists: survey evidence from Wales. Health Policy. 2003, 63: 229-237. 10.1016/S0168-8510(02)00101-X.View ArticlePubMedGoogle Scholar
- Ridderstolpe L, Collste G, Rutberg H, Ahlfeldt H: Priority setting in cardiac surgery: a survey of decision making and ethical issues. J Med Ethics. 2003, 29: 353-358. 10.1136/jme.29.6.353.View ArticlePubMedPubMed CentralGoogle Scholar
- Dennett ER, Parry BR: Generic surgical priority criteria scoring system: the clinical reality. N Z Med J. 1998, 111: 163-166.PubMedGoogle Scholar
- Dennett ER, Kipping RR, Parry BR, Windsor J: Priority access criteria for elective cholecystectomy: a comparison of three scoring methods. N Z Med J. 1998, 111: 231-233.PubMedGoogle Scholar
- Brouwer WBF, Hermans EGM: Private clinics for employees as a Dutch solution for waiting lists: economic and legal arguments. Health Policy. 1999, 47: 1-17. 10.1016/S0168-8510(99)00005-6.View ArticlePubMedGoogle Scholar
- Conner-Spady B, Estey A, Arnett G, Ness K, McGurran J, Bear R, Noseworthy T, the Steering Committee of the Western Canada Waiting List Project: Determinants of patient and surgeon perspectives on maximum acceptable waiting times for hip and knee arthroplasty. J Health Serv Res Policy. 2005, 10: 84-90. 10.1258/1355819053559155.View ArticlePubMedGoogle Scholar
- Conner-Spady BL, Sanmugasunderam S, Courtright P, Mildon D, McGurran JJ, Noseworthy TW, for the Steering Committee of the Western Canada Waiting List Project: Patient and physician perspectives of maximum acceptable waiting times for cataract surgery. Can J Ophthalmol. 2005, 40: 439-447.View ArticlePubMedGoogle Scholar
- The pre-publication history for this paper can be accessed here:http://www.biomedcentral.com/1472-6963/7/32/prepub
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