Table 1

Clinical characteristics of the preterm infants

Patient number	Sex	Gestational age (weeks)	Birth weight (g)	Apgar score at 5 min	Age at blood transfusion (days)	Duration of oxygen therapy (days)	Age at the start of enteral feeding (days)	Age on reaching 100 ml/kg/day feeding (days)	Chronic complications
1	M	27	1076	9	25	3	5	29	ROP stage 1^1-150
2	M	27	1021	8	25	42	6	14	CLD
3	M	30	1318	9	79	56	2	19	CLD, ROP stage3
4	F	26	717	2	32	58	7	21	CLD, ROP stage 2
5	F	32	743	6	77	4	3	11	ROP stage 2
6	M	27	1070	8	38	63	9	33	CLD, ROP stage 2
7	F	31	972	7	52	1	4	10	None
8	M	29	1168	7	32	37	10	13	None
9	M	31	1644	7	56	9	3	6	None
10	M	27	1220	5	38	51	7	13	CLD, ROP stage 3
11	M	26	932	9	20	61	1	21	CLD, ROP stage 2
12	M	28	1244	9	46	10	7	13	None
13	F	32	1150	7	35	10	4	14	None
14	F	26	1132	9	31	64	5	19	ROP stage 2
15	M	27	929	7	19	36	3	9	CLD, ROP stage 2
16	F	32	608	3	14	120	9	101	CLD, ROP stage 3
17	F	24	742	8	29	84	4	33	CLD, ROP stage 3
18	M	25	800	6	25	162	5	40	CLD, ROP stage 4
19	F	27	1050	5	13	58	2	22	ROP stage 1
20	M	26	995	3	43	52	5	14	CLD, ROP stage 1
21	M	25	730	6	42	83	3	35	CLD, ROP stage 3
Median		27	1021	7	32	52	5	19