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Table 3 Selected characteristics of participants in the access to and use of mobile phones survey

From: Using the Medical Research Council framework for development and evaluation of complex interventions in a low resource setting to develop a theory-based treatment support intervention delivered via SMS text message to improve blood pressure control

   Male Female Total
Demographics
N   30 97 127
 Age   56 (13) 55 (12) 55 (12)
 Level of formal education
  Primary (%) 37 33 34
  High (%) 63 67 66
 Employed (%)   37 25 27
 Social grant access (if unemployed) (%)   84 77 78
Access to a mobile phone
 I have regular (daily) access to a mobile phone, n(%)   25 (83) 90 (93) 115 (90)
 I own my own mobile phone, n(%)   21 (70) 75 (77) 96 (76)
 I regularly share my phone with other people, n(%)   4 (13) 26 (27) 30 (24)
 My phone is with me most or all of the time, n(%)   20 (67) 80 (82) 100 (79)
 I have had the same mobile phone number for 2 or more years, n(%)   18 (60) 62 (64) 80 (63)
 This phone number is registered to my identity number, n(%)   20 (67) 77 (79) 97 (76)
 I would act to keep my same number even if my phone was lost or stolen or I changed provider, n(%)   23 (77) 85 (88) 108 (85)
Communication preferences
 I feel very confident using my phone to Receive an SMS text, n(%) 17 (68) 64 (71) 81 (70)
Send an SMS text, n(%) 14 (56) 49 (54) 63 (55)
Make a call, n(%) 22 (88) 86 (95) 108 (94)
Set a reminder, n(%) 14 (56) 38 (43) 52 (46)
Add a contact, n(%) 17 (68) 53 (59) 70 (61)
Send a “Please Call Me”, n(%) 18 (72) 63 (70) 81 (70)
Cell-phone banking (USSD), n(%) 4 (16) 5 (6) 9 (8)
Attitudes towards text message intervention
 Perceptions of receiving a reminder to attend next clinic appointment Helpful, n(%) 29 (97) 88 (91) 117 (92)
 Perceptions of receiving a reminder to collect medications Helpful, n(%) 30 (100) 90 (93) 120 (94)
 Perceptions of receiving a reminder to take medications Helpful, n(%) 26 (87) 85 (87) 111 (87)
 Preferred contact type if clinic needs to get in touch SMS text 14 (47) 75 (74) 89 (70)
Phone call 14 (47) 18 (19) 32 (25)
Other 2 (6) 4 (4) 6 (5)