Table 8.

One year follow-up of the premature infants

group	Number of cases	MDI		PDI
		6 months	12 months	6 months	12 months
weight < 1000g group	11	85.47 + 6.12	90.32 + 5.82	81.45 + 5.49	84.45 + 5.98
Weight ≥ 1000~1250 g group	32	90.56 + 5.89	95.43 + 4.29	87.92 + 4.78	90.67 + 6.12
weight ≥ 1250~1500 g group	64	94.78 + 5.34	102.44 + 4.12	93.55 + 5.23	97.43 + 5.26
t	-	1.31	2.34	4.19	4.99
P	-	0.09	0.12	0.027	0.01

Note: A significant difference is P < 0.05.