. 2022 Jan 17;22:43. doi: 10.1186/s12884-021-04344-w

Table 3.

Effect measures for the primary outcomes (intention to treat analysis)

Variable	Absolut event rate (n) (cluster n = 40)	RD 95%CI^a	OR 95%CI^b	ICC
Any primary outcomes^c	0.12 (50/404)	0.18 (85/468)	− 0.06 − 0.09 to − 0.02	0.63 0.42 to 0.95	0.03
Perinatal deaths 2016 and 2017	0.02 (10/404)	0.03 (16/468)	− 0.01 − 0.04 to 0.02	0.73 0.31 to 1.75	0.04
Neonatal complications^d	0.06 (23/389)	0.07 (39/456)	− 0.04 − 0.08 to 0.01	0.59 0.30 to 1.18	0.05
Childbirth serious problems	0.05 (19/393)	0.08 (35/456)	− 0.05 − 0.08 to − 0.02	0.35 0.14 to 0.92	0.00
Caesarean section	0.13 (50/381)	0.15 (66/441)	−0.03 − 0.10 to 0.04	0.78 0.47 to 1.31	0.11
Perineal trauma or wound infection	0.21 (81/389)	0.21 (94/455)	0.01 −0.07 to 0.08	1.06 0.70 to 1.61	0.07
Perineal trauma or wound infection in home childbirths	0.11 (17/156)	0.24 (27/116)	−0.12 − 0.27 to 0.01	0.40 0.15 to 1.05	0.18

Variable

Absolut event rate
(n)
(cluster n = 40)

RD
95%CI^a

OR
95%CI^b

ICC

Intervention

Control

Any primary outcomes^c

0.12

(50/404)

0.18

(85/468)

− 0.06

− 0.09 to − 0.02

0.63

0.42 to 0.95

0.03

Perinatal deaths 2016 and 2017

0.02

(10/404)

0.03

(16/468)

− 0.01

− 0.04 to 0.02

0.73

0.31 to 1.75

0.04

Neonatal complications^d

0.06

(23/389)

0.07

(39/456)

− 0.04

− 0.08 to 0.01

0.59

0.30 to 1.18

0.05

Childbirth serious problems

0.05

(19/393)

0.08

(35/456)

− 0.05

− 0.08 to − 0.02

0.35

0.14 to 0.92

0.00

Caesarean section

0.13

(50/381)

0.15

(66/441)

−0.03

− 0.10 to 0.04

0.78

0.47 to 1.31

0.11

Perineal trauma or wound infection

0.21

(81/389)

0.21

(94/455)

0.01

−0.07 to 0.08

1.06

0.70 to 1.61

0.07

Perineal trauma or wound infection in home childbirths

0.11

(17/156)

0.24

(27/116)

−0.12

− 0.27 to 0.01

0.40

0.15 to 1.05

0.18

RD risk difference, OR odds ratio, ICC Intra-cluster correlation coefficient

^aBaseline-adjusted cluster-level analysis using t-test as presented by Campbell, 2014

^bOR and confidence intervals calculated with a GLMM using lme4 package in R

^cchildbirth or neonatal complication or perinatal death

^d854 women with completed pregnancies reported on childbirth or neonatal complications, and 18 women with completed pregnancies reported only on perinatal deaths