| Variables | Cases, n (%) | Controls, n (%) |
| Gender |
|
|
| Male | 94 (47.0) | 107 (53.5) |
| Female | 103 (52.3) | 93 (46.5) |
| Gestational age groups (weeks) |
|
|
| 22 - <28 | 3 (1.5) | _ |
| 28 - <32 | 47 (22.0) | _ |
| 32 - <34 | 62 (31.0) | _ |
| >34 - <37 | 91 (45.5) | _ |
| ≥37 | _ | 200 (100) |
| Birth weight(g) [M +/− SD] | 1880.28 +/− 458.703 | 3399.35 +/− 632.899 |