Table 6.

Synthesis of the outcomes on skilled birth attendance.

References	Intervention	Impact on skilled birth attendance
Alam et al. (38)	SMS/voice message reminders	No significant association between exposure to phone messages during pregnancy and skilled birth attendance at home/health facility (RR 1.2)
Atnafu et al. (39)	SMS reminders	Delivery supervised by Health Extension Workers in the SMS group increased significantly compared to baseline. The control group experienced a significant reduction of deliveries supervised by Health Extension Workers.
Hackett et al. (45)	App + SMS reminders	Facility delivery in the mHealth intervention group was 74% compared to 63% in the control group at (OR 1.96)
Lund et al. (48)	SMS reminders	The intervention produced a significant increase in skilled delivery attendance amongst urban women (OR 5.73).
Murthy et al. (53)	App + voice reminders	The intervention group performed significantly better than controls on delivering in hospital (OR 2.5).
Shiferaw et al. (58)	App + SMS reminders + data collection module	Women in the intervention health centers significantly more likely to have institutional delivery compared to the control group (AOR 1.98).

AOR, Adjusted Odds Ratio; OR, Odds Ratio; RR, Relative Risk.