Table 3

Association between active antenatal care and individual or organisational characteristics using two-level (women/maternity unit) models

Model 0Model 1Model 2Model 3
Level of perinatal care of maternity unit of delivery
 10.23 (0.09 to 0.58)
 20.21 (0.11 to 0.37)
 31
French nationality
 Yes11
 No1.04 (0.57 to 1.90)0.98 (0.54 to 1.77)
 Missing1.10 (0.52 to 2.34)1.12 (0.53 to 2.34)
Marital status
 Single0.52 (0.26 to 1.06)0.59 (0.29 to 1.17)
 Married or cohabiting11
 Missing0.36 (0.12 to 1.09)0.52 (0.17 to 1.56)
Age
 <250.81 (0.48 to 1.38)0.81 (0.48 to 1.36)
 25–4011
 ≥400.92 (0.50 to 1.68)0.96 (0.53 to 1.74)
History of psychiatric disease
 No11
 Yes0.41 (0.06 to 2.76)0.36 (0.06 to 2.20)
Parity
 Multipara11
 Primipara0.97 (0.61 to 1.53)0.99 (0.64 to 1.56)
Infertility treatment
 Yes1.02 (0.43 to 2.43)1.07 (0.45 to 2.46)
 No11
Regular consultation during pregnancy
 Yes11
 No1.48 (0.71 to 3.08)1.30 (0.63 to 2.66
Circumstances of preterm birth
 Preterm labour11
 Preterm premature rupture of membranes1.30 (0.81 to2.09)1.11 (0.69 to 1.78)
 Hypertensive disorders without fetal growth restriction1.64 (0.18 to 15.17)1.84 (0.21 to 15.92)
 Hypertensive disorders with fetal growth restriction3.51 (0.50 to 24.62)3.22 (0.43 to 23.89)
 Placental abruption0.33 (0.03 to 3.58)0.40 (0.04 to 4.24)
 Fetal growth restriction without hypertensive disorders0.13 (0.04 to 0.44)0.13 (0.04 to 0.44)
Gestational age in weeks
 220.03 (0.01 to 0.08)0.04 (0.01 to 0.16)0.06 (0.02 to 0.20)
 230.06 (0.03 to 0.14)0.07 (0.03 to 0.18)0.09 (0.04 to 0.23)
 24111
 254.63 (2.77 to 7.76)7.19 (3.73 to 13.86)6.46 (3.40 to 12.27)
 267.52 (4.55 to 12.43)11.71 (5.97 to 22.99)10.09 (5.26 to 19.36)
Birth weight
 <50011
 500–6005.30 (1.58 to17.73)5.16 (1.56 to 16.99)
 600–7004.46 (1.28 to 15.62)3.84 (1.11 to 13.26)
 >7003.58 (0.99 to 12.97)3.30 (0.92 to 11.82)
Sex
 Girl0.91 (0.59 to 1.40)0.86 (0.56 to 1.32)
 Boy11
Variance at the maternity unit level1.531.351.110.52
Test of the residual variance<0.001<0.001<0.0010.03
Proportional change of the variance0.120.270.66