. 2006 Jun 5;92(1):F25–F29. doi: 10.1136/adc.2005.086421

Table 2 Association of the investigated genotypes with ventilation characteristics and perinatal complications.

Results of multiple linear regression analysis
Dependent variable		Independent variables		p		B		e^B
Log (duration of mechanical ventilation)		Carrier state of the IFN T allele		0.002		−0.533		0.59
Log (duration of oxygen supplementation)		Carrier state of the IFN T allele		0.003		−0.438		0.65

Results of stepwise binary logistic regression analysis
Dependent variable	Independent variables		p		β		e^β = OR, 95% CI
Bronchopulmonary dysplasia	IFN T allele		0.049		−1.054		0.35, 0.12 to 0.99
	IFN AA×IL12 ID genotype		0.042		1.488		4.43, 1.06 to 18.6
Patent ductus arteriosus	IFN T allele		0.043		−0.837		0.43, 0.19 to 0.97
Idiopathic respiratory distress syndrome	IFN A allele		0.016		1.395		4.03, 1.30 to 12.5
Severe hypotension in infection	IFN A allele		0.049		1.225		3.40, 1.01 to 11.5
Pneumonia	IL12 D allele		0.009		−1.135		0.322, 0.138 to 0.750
	IL12 DI genotype		0.016		−1.076		0.341, 0.142 to 0.819
Necrotising enterocolitis	IL12 I allele		0.046		0.862		2.369, 1.013 to 5.533
	IL12 DI genotype		0.004		1.069		2.914, 1.410 to 6.015

β, standardised regression coefficient; B, raw regression coefficient; e^B, ratio of the durations of ventilation to oxygen supplementation between infants with and without IFN T allele; IFN, interferon; IL, interleukin.