Measurement and Analysis of Central Corneal Thickness at Different Postnatal Stages in Chinese Premature Infants

Table 3

Mean CCT of different genders at each PMA.

PMA	Male CCT (mean ± SD)	N	Female CCT (mean ± SD)	N	t
34 w	611.13 ± 58.78	310	590.41 ± 52.76	214	4.13	＜0.001
36 w	601.35 ± 56.01	412	576.27 ± 50.41	311	6.22	＜0.001
38 w	588.86 ± 49.50	323	572.92 ± 52.92	262	3.75	＜0.001
40 w	572.86 ± 52.08	264	554.17 ± 49.54	265	4.23	＜0.001
42 w	557.88 ± 47.98	169	543.33 ± 41.75	124	2.71	0.01
44 w	554.32 ± 44.52	82	541.20 ± 45.85	76	1.83	0.07
46 w	541.40 ± 43.59	87	535.37 ± 46.78	61	0.80	0.42
48 w	539.32 ± 36.85	68	535.78 ± 37.78	45	0.49	0.62
52 w	537.18 ± 42.06	90	525.38 ± 33.07	60	1.83	0.07
64 w	532.49 ± 45.06	67	518.39 ± 32.29	39	1.71	0.09
76 w	529.29 ± 37.61	41	524.14 ± 26.87	28	0.62	0.54
88 w	531.59 ± 39.76	39	526.65 ± 35.79	26	0.51	0.61

PMA: postmenstrual age; N: number of infants; CCT: central corneal thickness.