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

Table 5

Mean CCT of different GAs at each PMA.

PMA	GA				t
	<30 w		>30 w
	CCT (μm)	N	CCT (μm)	N
34 w	619.67 ± 56.18	237	588.63 ± 54.35	287	6.41	<0.0001
36 w	605.33 ± 59.24	271	581.72 ± 50.43	452	5.70	<0.0001
38 w	589.96 ± 51.80	245	575.78 ± 50.75	340	3.31	0.001
40 w	572.54 ± 52.27	187	558.56 ± 50.67	342	3.00	0.003
42 w	554.22 ± 46.90	132	549.68 ± 45.18	161	0.84	0.40
44 w	552.40 ± 47.77	89	542.33 ± 42.05	69	1.38	0.17
46 w	541.08 ± 42.00	67	532.03 ± 45.99	81	1.24	0.22
48 w	540.03 ± 35.78	61	535.42 ± 38.78	52	0.66	0.51
52 w	535.11 ± 35.86	81	529.35 ± 42.50	69	0.13	0.37
64 w	533.56 ± 43.25	61	518.82 ± 37.15	45	1.84	0.07
76 w	531.93 ± 40.20	36	525.67 ± 34.41	33	0.18	0.85
88 w	539.85 ± 37.87	41	525.67 ± 34.41	24	0.25	0.53

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