Screening Retinopathy of Prematurity in Extremely Low Birth Weight Infants in China and the Need for Earlier Screening Times

Table 2

Different birth weight and gestational age between infants with or without retinopathy of prematurity.

Variables	Infants without any ROP	Infants with any ROP	value
Birth weight (g), mean (SD)	898.6 (102.6)	898.7 (102.6)
Gestational age (weeks), mean (SD)	29.1 (2.0)	27.9 (1.6)

of variance.
SD: standard deviation.