98 Chapter 5 Table 2. Baseline characteristics All (n=87) Gender, n (%) Male 44 (50.6) Female 43 (49.4) Ethnicity, n (%) White 66 (75.9) Other 21 (24.1) Gestational age (weeks), mean (SD) 29.0 (1.8) Birthweight (g), mean (SD) 1210 (216) Birthweight SDS, mean (SD) 0.0 (0.7) Birthweight SDS < -1.3, n (%) 3 (3.4) Birth length (cm), mean (SD) 37.4 (3.2) Birth length SDS, mean (SD) 0.0 (0.9) Birth head circumference (cm), mean (SD) 26.7 (2.2) Birth head circumference SDS, mean (SD) 0.3 (1.0) BPD, n (%) Yes 30 (34.4) No 57 (65.5) NEC, n (%) Yes 8 (9.2) No 79 (90.8) LOS, n (%) Yes 30 (34.5) No 57 (65.5) PDA, n (%) No PDA 68 (78.2) Hemodynamically insignificant PDA 11 (12.6) Hemodynamically significant PDA 8 (9.2) ROP, n (%) No ROP 82 (94.3) ROP stage I 4 (4.6) ROP stage III 1 (1.1) IVH, n (%) No IVH 64 (73.6) IVH grade I 8 (9.2) IVH grade II 11 (12.6) IVH grade III 4 (4.6)
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