Association between serum calcium and gestational age of LBW
| Calcium | Gestational age(week) | Total(%) | Chi-square | p-value | |||
|---|---|---|---|---|---|---|---|
| 28–31(%) | 31–34(%) | 34–37(%) | 37–40(%) | ||||
| Low | 25 | 31.25 | 31.25 | 12.5 | 100 | 3.63 | 0.727 |
| Normal | 12.2 | 26.82 | 36.58 | 24.4 | 100 | ||
| High | 33.3 | 0 | 33.3 | 33.4 | 100 | ||