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Table 2 Characteristics of the study cohort and sample

From: Empirical evidence of the continuing improvement in cost efficiency of an endoscopic surveillance programme for gastric cancer in Singapore from 2004 to 2010

  Cohort*(n = 749) Sample*(n = 216) P
Age (year)   60.13 (7.32) 7.32 (60.23) 0.86
Age group 50-59 years 426 (56.88) 121 (56.02)  
≥ 60 years 323 (43.12) 95 (43.98) 0.88
Gender Male 401 (53.54) 123 (56.94)  
Female 348 (46.46) 93 (43.06) 0.39
Risk profile Moderate 211 (28.17) 59 (27.31)  
High 538 (71.83) 157 (72.69) 0.86
Follow-up (year)   3.34 (1.28) 3.55 (1.22) 0.03
Outcome EGC 6 (0.8) 1 (0.46)  
Death 7 (0.93) 2 (0.93)  
Drop-out 49 (6.54) 8 (3.70)  
Survival 687 (91.73) 205 (94.91) 0.47
Incidence Rate   240 (108, 534) 131 (18, 930) 0.98 §
Death Rate   280 (133, 587) 262 (66, 1048) 0.978 §
Drop-out Rate   1959 (1481, 2592) 1049 (524, 2097) 0.831 §
  1. Abbreviation: EGC: early gastric cancer.
  2. * Values are the mean (SD) for continuous variables and n (%) for categorical variables. Rates are reported with 95% confidence interval.
  3. Student t-test.
  4. Chi-Square test.
  5. § Fisher’s exact test based on rate difference.
  6. Unit of rates is 1/100,000 per year.