Table 2.
Descriptive Statistics of Cases and Controls
| Demographic Characteristics | Cases (n=99) | Controls (n=97) |
|---|---|---|
| Gestational Age | ||
| <37 weeks | 11 (11%) | 7 (7%) |
| 37+ weeks | 84 (85%) | 90 (93%) |
| Missing | 4 (4%) | 0 |
| Birth Weight (grams) | ||
| <2500 | 9 (9%) | 4 (4%) |
| 2500-3500+ | 86 (87%) | 92 (95%) |
| Missing | 4(4%) | 1 (1%) |
| Birth Month | ||
| Nov-Apr | 47 (47%) | 47 (47%) |
| May-Oct | 48 (48%) | 49 (49%) |
| Missing | 4 (4%) | 1 (1%) |
| Breech Presentation (p= 0.026) | ||
| Yes | 9 (9%) | 2 (2%) |
| No | 84 (85%) | 94 (97%) |
| Missing | 6(6%) | 1 (1%) |
| Maternal Age at Conception (p=0.033) | ||
| <25 | 33 (35%) | 17 (18%) |
| 25-34 | 46 (46%) | 56 (58%) |
| 35+ | 8 (8%) | 15 (15%) |
| Missing | 12(12%) | 9 (9%) |
| Maternal smoking during pregnancy | ||
| Yes | 1 (1%) | 0 |
| No | 96 (97%) | 97 (100%) |
| Missing | 2 (2%) | 0 |
| Maternal diabetes | ||
| Yes | 0 | 1 (1%) |
| No | 95 (96%) | 64 (66%) |
| Missing | 4 (4%) | 32 (33%) |
| Maternal Education (years) | ||
| <12 | 64 (65%) | 60 (62%) |
| >12 | 32 (32%) | 36 (37%) |
| Missing | 3 (3%) | 1 (1%) |
| Maternal Marital Status | ||
| Married | 96 (97%) | 97 (100%) |
| Single | 1 (1%) | 0 |
| Missing | 2 (2%) | 0 |
| Paternal age at conception | ||
| <25 | 9 (9%) | 3 (3%) |
| 25-34 | 54 (55%) | 54 (56%) |
| 35+ | 23 (23%) | 31 (32%) |
| Missing | 13 (13%) | 9 (9%) |
| Paternal smoking | ||
| Yes | 61 (62%) | 60 (62%) |
| No | 28 (28%) | 36 37%) |
| Missing | 10 (10%) | 1 (1%) |