Table 5.

Univariable and multivariable models for the association of mean NCI with baby and hospital characteristics

	Model 1: univariable associations				Model 2: multivariable associations
	Coefficient	95% CI	P value	R2	Coefficient	95% CI	P value
Gender
Male	Ref			0.003
Female	1.99	−2.84 to 6.81	0.418
Birth weight (kg)
<1.4	Ref			0.026
1.5 to <1.9	−7.75	−14.23 to −1.28	0.020
2.0 to <2.4	−3.37	−11.92 to 5.17	0.440
≥2.5	−3.84	−9.68 to 2.01	0.200
Age (days)
≤2	Ref			0.061	Ref
3–7	−0.16	−6.34 to 6.02	0.959		1.78	−3.06 to 6.64	0.469
8–28	8.82	2.70 to 14.95	0.005		7.46	2.55 to 12.36	0.003
Nursing shift
Day				0.013
Night	−4.03	−8.79 to 0.73	0.100
Neonatal care category
A (severe illness)	Ref			0.015	Ref
B (moderate severity)	−3.25	−9.09 to 2.59	0.274		−4.27	−8.78 to 0.23	0.063
C (stable)	−5.34	−11.23 to 0.56	0.076		−7.65	−12.29 to −3.02	0.001
Baby:nurse ratio
1–3 babies/nurse	Ref			0.406	Ref
4–11 babies/nurse	−11.79	−16.65 to −6.92	<0.001		−11.49	−16.26 to −6.73	<0.001
≥12 babies/nurse	−25.89	−30.13 to −21.65	<0.001		−24.41	−28.64 to −20.17	<0.001
Sector
Mission	Ref			0.556
Private	9.13	5.21 to 13.05	<0.001
Public	−22.40	−26.32 to −18.49	<0.001

NCI, nursing care index.