Table 1.
Descriptive Data of Group 1 and Group 2
| Group 1(n = 725) (mean ± SD) | Group 2 (n = 869) (mean ± SD) | |||||
|---|---|---|---|---|---|---|
| Variables | <30 weeks (n = 168) | 31–32 weeks (n = 246) | 32–34 weeks (n = 311) | 35–36 weeks (n = 393) | 37–42 weeks (n = 476) | P |
| Gender (female/male) | 81/87 | 111/135 | 151/160 | 163/230 | 213/263 | >0.05 |
| Birth weight (g) | 1,185 ± 289 | 1,576 ± 277 | 2,021 ± 468 | 2,598 ± 438 | 3,264 ± 458 | <0.05a |
| Hemoglobin (g/dl) | 16.52 ± 2.7 | 17.22 ± 2.2 | 17.54 ± 2.1 | 17.45 ± 2.13 | 17.3 ± 1.98 | <0.05b |
| Hematocrit (%) | 49.7 ± 8.9 | 51.5 ± 7.8 | 54.5 ± 7.4 | 54.3 ± 7.2 | 53.2 ± 6.9 | <0.05b |
| MCV (fl) | 115.6 ± 5.4 | 114.0 ± 7.3 | 113.4 ± 6.2 | 117 ± 5.4 | 119 ± 9.3 | <0.05c |
MCV, mean corpuscular volume.
a
aSignificant differences among all groups.
b
bSignificant differences between <30 week of gestation and the other groups.
c
cSignificant differences between 35–36 weeks and 37–42 weeks and the other groups.