Analysis of Current Status and Strategies of Retinopathy of Prematurity Screening during 6 Years in Local Regions of China: Implication and Caution

Table 1

The time of initial screening for infants with different gestational age.

Groups	GAs; (weeks)	Postnatal age of initial screening; (weeks)
Group 1 (<30.00 weeks)	28.62 ± 0.99	9.23 ± 4.73^∧
Group 2 (30.00~31.86 weeks)	30.88 ± 0.61	8.07 ± 5.85^*
Group 3 (32.00~33.86 weeks)	32.79 ± 0.61	7.10 ± 3.96^*∧
Group 4 (34.00~35.86 weeks)	34.75 ± 0.60	7.00 ± 4.22^*∧
Group 5 (≥36.00 weeks)	37.20 ± 1.39	6.91 ± 3.95^*∧
		32.784
		0.000

Versus Group 1; versus Group 2; GA = gestational age and it was expressed as mean ± standard deviation.