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Table 1 Demographics of the 3587 very preterm infants included in the study

From: Using ROPScore and CHOP ROP for early prediction of retinopathy of prematurity in a Chinese population

Characteristics No ROP
(N = 3215)
Type 2 ROP
(N = 192)
Type 1 ROP
(N = 180)
P value
Male 1938(60.2) 113(58.9) 111(61.7) 0.857
BW (g)* 1210.3 ± 217.1 1120.1 ± 225.0 1091.5 ± 221.3 < 0.001
GA (weeks)* 28.8 ± 3.7 27.9 ± 3.3 27.6 ± 3.5 < 0.001
Mean WG rate at the third week of life (g/d)* 22.1 ± 20.1 21.8 ± 15.0 18.5 ± 16.1 < 0.001
Mean WG rate at the fourth week of life (g/d)* 24.6 ± 23.1 20.6 ± 17.8 16.4 ± 12.7 < 0.001
Mean WG rate at the fifth week of life (g/d)* 19.5 ± 13.4 13.2 ± 14.6 11.2 ± 12.1 < 0.001
Mean WG rate at the Sixth week of life (g/d)* 16.8 ± 12.7 13.8 ± 14.5 13.2 ± 11.3 < 0.001
  1. *Data are expressed as the mean ± SD; BW Birth Weight; GA Gestational Age; ROP Retinopathy of Prematurity; SD Standard Deviation; WG Weight gain