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. Author manuscript; available in PMC: 2022 Sep 1.
Published in final edited form as: Graefes Arch Clin Exp Ophthalmol. 2021 Mar 29;259(9):2661–2669. doi: 10.1007/s00417-021-05158-4

Table 1.

Demographic and ocular characteristics of study population

Infant Characteristics (n = 66)

n %
Gestational age (weeks)
23 2 3.0
24 9 13.6
25 5 7.6
26 10 15.2
27 6 9.1
28 14 21.2
29 12 18.2
30 4 6.1
> 30 4 6.1
Birthweight (grams)
≤ 750 19 28.8
> 750 to ≤ 1000 17 25.8
> 1000 to ≤ 1250 23 34.8
> 1250 7 10.6
Sex
Female 33 50.0
Male 33 50.0
Race
White 33 50.0
Black 28 42.4
Asian 2 3.0
Others 3 4.5
Multiparity
Singleton 46 69.7
Multiple gestation 20 30.3
Eye characteristics (n = 132)
Highest retinopathy of prematurity stage ever present before 42 weeks postmenstrual age n %
0 45 34.1
1 25 18.9
2 48 36.4
3 13 9.8
4 1 0.8
Treated for retinopathy of prematurity 8 6.1