Table 8.

Multivariate analyses–visual assessment at 12 months and at 20 years.

Multivariate analysis-visual assessment at 12 months Remarks = 491 LR Chi2 (2) = 19.07 Pseudo R2 = 0.08 p > chi2 <0.01
Outcome variable: refractive error or ROP at 12 months vs. normal vision.	raw OR 95% CI	p
Ballard at birth	0.82 [0.71, 0.94]	<0.01

Visual assessment at 20 years
Outcome variable: Uni or bilateral normal vision vs. abnormal bilateral vision or abnormal unilateral vision and moderate refractive error in the other eye (with or without correction).	raw OR 95% CI	p
Ballard at birth (483 obs; R2 0.05)	0.79 [0.69, 0.91]	<0.01
Total days with oxygen in the neonatal period (265 obs; R2 0.04)	1.06 [1.01, 1.10]	<0.01

LR, Likelihood ratio. Chi2, Chi2 test. ROP, Retinopathy of prematurity. GA, GA. OR, Odds ratio. CI, confidence Interval. Obs, observations.