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. 2021 Jan 28;6(1):e003357. doi: 10.1136/bmjgh-2020-003357

Table 4.

Reported receipt of SMS reminders, opinions about SMS reminders, experience with and opinions about incentives

Reported receipt of SMS reminders
SMS (N=146) SMS + 150 KES (N=149)
All n (%) Own n (%) Share n (%) P value All n (%) Own n (%) Share n (%) All n (%)
Received ≥1 SMS reminder 98 (67) 66 (67) 32 (33) –* 120 (81) 82 (68%) 38 (32) –*
 Received one reminder 30 (31) 18 (27) 12 (38) 0.303 21 (18) 12 (15%) 9 (24) 0.225
 Received two reminders 62 (63) 47 (71) 15 (47) 0.019 94 (78) 68 (83%) 26 (68) 0.073
 Received three reminders 1 (1) 1 (2) 0 (0) 0.484 2 (2) 2 (2%) 0 (0) 0.332
 Don’t know 5 (5) 0 (0) 5 (16%) 0.001 3 (3) 0 (0) 3 (8) 0.010
Opinions about SMS reminders
SMS (N=98) (%) SMS + 150KES (N=120) (%)
SMS influenced decision to vaccinate 88 (90) 110 (92)
 Received MCV1 by age 12 months 80 (91) 96 (87)
Number of SMS reminders
 Too few 8 (8) 15 (13)
 Just right 80 (82) 94 (78)
 Shared mobile phone 7 (7) 9 (8)
 Don't know 3 (3) 2 (2)
Length of SMS reminders
 Too short 0 (0) 1 (1)
 Right length 88 (90) 106 (88)
 Shared mobile phone 8 (8) 13 (11)
 Don't know 2 (2) 0 (0)
Experience with, and opinions about incentives
SMS +150 KES (N=149) (%)
Received MCV1 incentive 105 (71)
 Owned phone 76 (72)
Incentive influenced decision to vaccinate 88 (84)
 Received MCV1 by age 12 months 78 (89)
Mobile money cashed out
 Day when received 16 (15)
 Within 1–3 days of receipt 67 (64)
 More than 3 days after receipt 20 (19)
 Not cashed out 2 (2)
Experience receiving incentive
 Very positive 98 (93)
 Somewhat positive 2 (2)
 Neutral 4 (4)
 Very negative 1 (1)
Likelihood of future vaccination in the absence of incentive
 More likely 95 (91)
 Less likely 1 (1)
 The same 8 (8)
 Don't know 1 (1)
M-PESA use
 Transport cost 59 (56)
 Housing expenses 21 (20)
 Food 16 (15)
 Airtime 1 (1)
 Medicine 5 (5)
 Infant’s clothing 2 (2)
 Not used yet 1 (1)

*p value not calculated as ownership of phone number to which reminder was sent was only collected for participants who reported that they received a reminder; there is no corresponding data on phone ownership for participants who reported that they did not receive any reminders.

KES, Kenya Shillings; MCV, measles-containing vaccine; SMS, short message service.