. Author manuscript; available in PMC: 2015 Oct 1.

Published in final edited form as: Graefes Arch Clin Exp Ophthalmol. 2014 Jul 23;252(10):1669–1677. doi: 10.1007/s00417-014-2716-1

Table 3.

Odds ratios from multivariate logistic regression analysis for presence of any retinopathy of prematurity (ROP) based on weight subgroups (birth weight <500g, 500–749g, 1251–1500g, >1500g).

	Whole cohort (N= 1354)	<500g (N= 15)	500–749g (N= 223)	1251–1500g (N= 293)	>1500g (N= 183)

Risk Factor	Odds ratios and (95% Confidence interval)
Female	^*	^*	^*	^*	^*
Birth Weight (100g)	0.819 (.740, .905)^†	^*	^*	^*	^*
Gestational age	0.738 (0.676, 0.805)^†	^*	^*	0.660 (0.571, 0.843)^†	^*
Multiple gestation	^*	^*	^*	^*	^*
Assisted conception	1.720 (1.207, 2.453)^†	^*	8.957 (1.154, 69.543)^†	^*	^*
Mechanical ventilation	^*	^*	1.996 (1.024, 3.891)^†	^*	^*
Sepsis	2.466 (1.498, 4.060)^†	^*	5.015 (1.118, 22.505)^†	^*	^*
Intraventricular hemorrhage	^*	^*	^*	^*	^*
Bronchopulmonary dysplasia	3.301 (1.534, 7.103)^†	^*	^*	^*	^*
Necrotizing enterocolitis	^*	^*	^*	^*	^*
Race/Ethnicity^‡:
Black non-Hispanic	0.484 (0.321, 0.729)^†	^*	^*	0.394 (0.128, 1.214)	^*
Hispanic	2.883 (1.639, 5.072)^†	^*	^*	1.688 (0.520, 5.476)	^*
Asian	1.255 (0.738, 2.136)	^*	^*	0.347 (0.073, 1.643)	^*
Other race/ethnicity	0.501 (0.353, 0.712)^†	^*	^*	0.362 (0.141, 0.930)^†	^*

Variable entered in the model but excluded from final regression equation.

^†

Statistically significant at the p < 0.05 level.

^‡

Odds ratios for race/ethnicity are compared to reference category White, non-Hispanic.

Eleven clinical and demographic risk factors were modeled as discrete variables (presence or absence) except for gestational age (GA, continuous variable with odds ratio calculated per 1-week increase), birth weight (BW, continuous variable with odds ratio calculated per 100-gram increase), and race/ethnicity (categorical variable).