Journal of Ophthalmology / 2021 / Article / Tab 4

Research Article

Fundus Examination of 23,861 Newborns by Digital Imaging in Ningbo

Table 4

Factors affecting ROP in premature infants by univariate analysis.

Affecting factorsTotalN (%)χ2

GenderMale1583338 (0.214)0.1230.726
Female1340279 (0.208)

Delivery modeVaginal delivery612123 (0.201)0.4750.491
Caesarean section2311494 (0.214)

HypertensionYes32172 (0.224)0.3780.539
No2602545 (0.209)

DiabetesYes35879 (0.221)0.2250.635
No2565538 (0.210)

Gestational age26–28 + 6w7349 (0.671)381.789<0.001
29–31 + 6w819305 (0.369)
32–34 + 6w1298257 (0.188)
35–36 + 6 w7336 (0.009)

Birth weight<1000 g6946 (0.681)404.664<0.001
1000–2000 g1187423 (0.356)
2000–3000 g1453147 (0.101)
>3000 g2140 (0.000)

Feeding methodsHuman milk1098289 (0.263)28.689<0.001
Formula1825328 (0.180)

Oxygen inhalationYes1921523 (0.272)125.913<0.001
No100294 (0.094)

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