Table 4.

Multivariate logistic regression analysis of risk factors for the clinical outcome in the internalizing, externalizing, and total behavior problems measured with Child Behavior Checklist (CBCL) and fair quality of life (QoL)*

		OR (95% CI)
	CBCL internalizing	CBCL externalizing	CBCL total	Fair QoL
Male gender (reference group: girls)	1.34 (0.81-2.21)	1.00 (0.57-1.76)	1.00 (0.59-1.69)	2.16 (1.25-3.74)
Child’s age when tested (years)	0.86 (0.74-0.99)	0.80 (0.67-0.94)	0.85 (0.72-0.99)	1.14 (0.97-1.33)
Mother’s age at delivery (years)	0.93 (0.88-0.97)	0.95 (0.90-1.01)	0.94 (0.89-0.99)	1.02 (0.97-1.07)
Complicated pregnancy	0.94 (0.56-1.59)	1.02 (0.57-1.86)	1.02 (0.58-1.78)	1.34 (0.75-2.39)
Cesarean section delivery (reference group: vaginal delivery)	0.75 (0.41-1.37)	0.83 (0.42-1.65)	0.62 (0.32-1.19)	0.89 (0.47-1.71)
Apgar score at 5 minutes	0.99 (0.84-1.19)	1.09 (0.89-1.34)	1.12 (0.93-1.38)	0.97 (0.80-1.18)
Duration of ICU treatment (days)	1.05 (1.00-1.10)	1.06 (1.01-1.11)	1.08 (1.03-1.14)	0.99 (0.94-1.04)
Mechanical ventilation	1.34 (0.59-3.03)	1.48 (0.62-3.53)	2.05 (0.86-4.89)	4.03 (1.69-9.60)
Mothers’ educational level (higher education is reference group)	0.63 (0.35-1.15)	0.95 (0.47-1.90)	0.65 (0.34-1.25)	1.11 (0.58-2.14)
Family socioeconomic status
good	reference	reference	reference	reference
medium	1.84 (0.93-3.61)	1.59 (0.73-3.48)	2.44 (1.14-5.24)	0.88 (0.43-1.80)
poor	1.35 (0.45-4.01)	1.87 (0.57-6.12)	4.22 (1.39-12.84)	2.57 (0.89-7.43)
Study group
FT-ICU	reference	reference	reference	reference
LP-ICU	4.76 (2.37-9.56)	3.08 (1.44-6.61)	6.29 (2.86-13.83)	12.79 (5.56-29.41)
LP-non-ICU	4.82 (2.25-10.37)	2.68 (1.14-6.28)	7.38 (3.08-17.69)	5.05 (2.04-12.48)

*Abbreviations: OR – odds ratio, CI – confidence interval, ICU – intensive care unit, FT-ICU – full-term infant treated in the ICU, LP-ICU – late preterm infant treated in the ICU, LP-non-ICU – late preterm infant not treated in the ICU.