Table 4.
Study ID | RCTs Number | Participant Included in Intervention and Control Group (N/n) | Association Measurement | I2(p) | Quality (Amstar 2) |
---|---|---|---|---|---|
Bain et al., 2015 [56] | 13 | 1903/1841 | RR 0.92 (0.68–1.23) | 43.13 (0.06) | Low |
Madhuvrata et al., 2015 * [23] | 6 | 562/526 | OR 1.44 (0.96–2.14) | 0 (0.93) | Moderate |
Rogozińska et al., 2015 [55] | 12 | 2399/2346 | RR 0.95 (0.76–1.18) | 23 (0.21) | Moderate |
Song et al., 2016 [20] | 14 | 6047 ** | RR 0.85 (0.70–1.03) | N.A. | Critically low |
Shepherd et al., 2017 [31] | 19 | 3353/3280 | RR 0.85 (0.71–1.01) | 42 (0.03) | High |
Davenport et al., 2018 [18] | 22 | 575/550 | OR 0.90 (0.74–1.10) | 30 (0.09) | High |
Bennett et al., 2018 [22] | 22 | 7274 ** | RR 0.90 (0.77–1.05) | 33 (0.072) | Moderate |
Guo et al., 2019 [51] | 18 | 7024 ** | RR 0.86 (0.71–1.04) | N.A. | Critically low |
* Population = women at high risk; ** Total sample size; N.A. = Not available; OR = odds ratio; RR = relative risk; N = exposed simple size; n = no exposed simple size; and I2(p) = heterogeneity test (p-value).