Comparison of the characteristics of cases and controls
| Characteristics | Total | Case n (%) | Control n (%) | χ2 | p-value |
|---|---|---|---|---|---|
| Total | 639 (100.0) | 213 (33.3) | 426 (66.7) | na | na |
| Sex | |||||
| Male | 360 (56.3) | 100 (27.8) | 260 (72.2) | 11.45 | <0.001* |
| Female | 279 (43.7) | 113 (40.5) | 166 (59.5) | ||
| Age at DF diagnosis (years) | |||||
| < 1 | 197 (30.8) | 98 (49.7) | 99 (50.3) | 34.97 | <0.001* |
| 1–5 | 191 (29.9) | 53 (27.7) | 138 (72.3) | ||
| ⩾ 6 | 251 (39.3) | 62 (24.7) | 189 (75.3) | ||
| Growth | |||||
| Under normal | 221(34.6) | 66 (29.9) | 155 (70.1) | 85.04 | <0.001* |
| Normal | 275 (43.0) | 55 (20.0) | 220 (80.0) | ||
| Over normal | 143 (22.4) | 92 (64.3) | 51 (35.7) | ||
| Immunization | |||||
| No or not complete | 118 (18.5) | 41 (34.8) | 77 (65.2) | 0.12 | 0.718 |
| Yes | 521 (81.5) | 172 (33.0) | 349 (67.0) | ||
| Congenital disease | |||||
| No | 543 (84.9) | 175 (32.2) | 368 (67.8) | 1.98 | 0.158 |
| Yes | 96 (15.0) | 38 (39.6) | 58 (60.4) | ||
| Breastfeeding | |||||
| Yes | 603 (94.8) | 199 (33.0) | 404 (67.0) | 0.529 | 0.466 |
| No | 36 (5.2) | 14 (38.9) | 22 (61.1) | ||
| Characteristics | Total | Case | Control | ||
|---|---|---|---|---|---|
| Total | 639 (100.0) | 213 (33.3) | 426 (66.7) | na | na |
| Male | 360 (56.3) | 100 (27.8) | 260 (72.2) | 11.45 | <0.001* |
| Female | 279 (43.7) | 113 (40.5) | 166 (59.5) | ||
| < 1 | 197 (30.8) | 98 (49.7) | 99 (50.3) | 34.97 | <0.001* |
| 1–5 | 191 (29.9) | 53 (27.7) | 138 (72.3) | ||
| ⩾ 6 | 251 (39.3) | 62 (24.7) | 189 (75.3) | ||
| Under normal | 221(34.6) | 66 (29.9) | 155 (70.1) | 85.04 | <0.001* |
| Normal | 275 (43.0) | 55 (20.0) | 220 (80.0) | ||
| Over normal | 143 (22.4) | 92 (64.3) | 51 (35.7) | ||
| No or not complete | 118 (18.5) | 41 (34.8) | 77 (65.2) | 0.12 | 0.718 |
| Yes | 521 (81.5) | 172 (33.0) | 349 (67.0) | ||
| No | 543 (84.9) | 175 (32.2) | 368 (67.8) | 1.98 | 0.158 |
| Yes | 96 (15.0) | 38 (39.6) | 58 (60.4) | ||
| Yes | 603 (94.8) | 199 (33.0) | 404 (67.0) | 0.529 | 0.466 |
| No | 36 (5.2) | 14 (38.9) | 22 (61.1) | ||
Note: *Statistically significant at p<0.05
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