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Table 1 Association between interaction with intervention and effective and long-acting contraception use at four months

From: Process evaluation of a mobile phone-based intervention to support post-abortion contraception in Cambodia

  Using effective contraception OR p value Using long-acting contraception OR p value
  No/total no. of respondents (%)    No/total no. of respondents (%)   
Per-protocol analysis
 Responded to 1–2 voice messages (r) 33/55 (60%) 1.00   18/55 (33%) 1.00  
 Responded to >2 voice messages 89/124 (72%) 1.70 (0.87-3.30) 0.121 40/124 (32%) 0.98 (0.50-1.93) 0.951
Response to voice message 1
 Call failed (r) 40/69 (58%) 1.00   16/69 (23%) 1.00  
 1 49/60 (82%) 3.23 (1.44-7.26) 0.005 24/60 (40%) 2.21 (1.03-4.73) 0.041
 2 36/58 (62%) 1.19 (0.58-2.42) 0.639 18/58 (31%) 1.49 (0.68-3.28) 0.321
 3 10/24 (42%) 0.52 (0.20-1.33) 0.171 3/24 (12%) 0.47 (0.12-1.79) 0.271
Response to voice message 1
 Didn't press '1' (r) 86/151 (57%) 1.00   37/151 (25%) 1.00  
 Pressed '1' 49/60 (82%) 3.37 (1.62-6.98) 0.001 24/60 (40%) 2.05 (1.09-3.88) 0.026
Whether participant ever pressed '1'
 Never (r) 53/100 (53%) 1.00   18/100 (18%) 1.00  
 1 or more 82/111 (74%) 2.51 (1.41-4.47) 0.002 43/111 (39%) 2.88 (1.52-5.45) 0.001
Spoke to counsellor after voice message '1'
 No (r) 44/74 (59%) 1.00   20/74 (27%) 1.00  
 Yes 91/137 (66%) 1.35 (0.75-2.42) 0.315 41/137 (30%) 1.15 (0.61-2.17) 0.658
Whether participant ever spoke to counsellor
 Never (r) 4/11 (36%) 1.00   1/11 (9%) 1.00  
 1 or more 131/200 (66%) 3.32 (0.94-11.74) 0.062 60/200 (30%) 4.29 (0.54-34.23) 0.170
Whether pressed '1' if spoke to counsellor
 Spoke to counsellor & never pressed '1' (r) 49/90 (54%) 1.00   17/90 (19%) 1.00  
 Spoke to counsellor & ever pressed '1' 82/110 (75%) 2.45 (1.35-4.45) 0.003 43/110 (39%) 2.76 (1.44-5.29) 0.002
Combinations of pressing '1' and speaking to counsellor
 Never pressed '1' & never spoke to counsellor (r) 4/10 (40%) 1.00   1/10 (10%) 1.00  
 Never pressed '1' & spoke to counsellor 49/90 (54%) 1.79 (0.47-6.79) 0.390 17/90 (19%) 2.10 (0.25-17.68) 0.496
 Pressed '1' & spoke to counsellor 82/110 (75%) 4.39 (1.15-16.71) 0.030 43/110 (39%) 5.78 (0.71-47.22) 0.102
 Pressed '1' & never spoke to counsellor 0/1 (0%) 1.00 (.-.) . 0/1 (0%) 1.00 (.-.) .
Whether received pill or injection reminders
 Didn’t receive pill or injection reminder (r) 96 (59%) 1.00   60 (37%) 1.00  
 Received pill or injection reminder 39 (83%) 4.63 (2.11-10.16) <0.001 1 (2%) 0.08 (0.01-0.62) 0.015
All participants 135/211 (64%)    61/211 (29%)   
  1. The per-protocol analysis included 179 participants. Participants were categorised as ‘highly protocol adherent’ if they responded (i.e. pressed number ‘1’ or ‘2’) to more than three messages and ‘less protocol adherent’ if they responded to three or fewer messages
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Contraception and Reproductive Medicine

ISSN: 2055-7426

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