From: Double- versus single-balloon catheters for labour induction and cervical ripening: a meta-analysis
Variables* | Number of studies analysed | Interventions | Pooled effect (95% CI)x | Q p-valuey | I2- statisticy | p-valuez | |
---|---|---|---|---|---|---|---|
Double | Single | ||||||
Maternal age (years)A | 5 [15,17–20] | 444 | 442 | 0.73 [−0.08, 1.53] | 0.89 | 0 | 0.08 |
Gestational weeks (weeks)A | 5 [15,17–20] | 444 | 442 | −0.07 [− 0.31, 0.17] | 0.71 | 0 | 0.56 |
Bishop score at catheter insertionB | 4 [15,17,19–20] | 337 | 332 | 0.02 [−0.19, 0.23] | 0.42 | 0 | 0.85 |
Induction indications | |||||||
 PostdatesC | 2 [17–18] | 157 | 158 | 1.10 [0.51, 2.37] | 0.15 | 51% | 0.81 |
 Diabetes mellitus | 3 [17–18,20] | 305 | 303 | 1.35 [0.80, 2.26] | 0.20 | 39% | 0.26 |
 Hypertensive disease | 3 [17–18,20] | 305 | 303 | 0.98 [0.66, 1.44] | 0.21 | 35% | 0.91 |
 Intrauterine growth restriction | 2 [17–18] | 157 | 158 | 0.92 [0.39, 2.21] | 0.23 | 29% | 0.86 |