Table 5

Multilevel analysis (random intercept model) of factors associated with withholding or withdrawal of intensive care in the delivery room (N=860 infants and N=165 maternity units)

Variables	Model 1 (N=860)	Model 2a (N=860)			Model 2b (N=823)
Fixed effects	Model 1 (N=860)	OR	95% CI	p Value	OR	95% CI	p Value
Social characteristics
Country of birth of the mother
France					1	–	0.8
Another European country					1.3	0.3 to 5.2
African country					1.4	0.7 to 2.6
Other					0.7	0.07 to 7.3
Antenatal medical characteristics
In vitro fertilisation
No					1		0.2
Yes					0.2	0.03 to 1.9	0.2
Multiple pregnancy
No					1	–	0.047
Yes					0.5	0.3 to 0.99	0.047
Chorioamnionitis
No					1	–	0.1
Yes					1.6	0.9 to 2.9	0.1
Delivery within 24 h of mother's hospitalisation
No					1	–	0.007
Yes					2.2	1.2 to 3.8	0.007
Neonatal characteristics
Gestational age (weeks)
24		21.5	10.7 to 43.2	< 0.0001	12.9	6.0 to 28.1	<0.0001
25		2.9	1.3 to 6.0		2.3	1.1 to 5.2
26		1	–		1	–
Birth weight (g)
<600					3.0	1.3 to 6.9	0.03
600 to <750 g					1.9	1.0 to 3.6
≥750 g					1
Random effects
Variance of u0j (τ00)	1.63*	0.37			0.41
Proportion of variance explained by all the variables in the model compared to the empty model		0.77			0.75

*Variance significantly different from 0.