Comparison 15. IM Avacan ® versus IM pentazocine.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Further analgesia required (nitrous oxide)	1	160	Risk Ratio (M-H, Fixed, 95% CI)	0.92 [0.53, 1.63]
2 Further analgesia required (pudendal-paracervical block)	1	160	Risk Ratio (M-H, Fixed, 95% CI)	2.02 [1.16, 3.53]
3 Caesarean section	1	184	Risk Ratio (M-H, Fixed, 95% CI)	0.63 [0.21, 1.84]
4 Low Apgar score (< 7) ”at birth”	1	160	Risk Ratio (M-H, Fixed, 95% CI)	0.59 [0.27, 1.26]