Table 2 Bivariate analysis of the risk factors for intussusception
| Â | Cases | Controls | OR (95% CI) | Pv |
|---|---|---|---|---|
Age (months), n (%) | Â | Â | Â | Â |
< 3 | 10 (5.3) | 33 (11.2) | Reference | <0.001 |
3-5 | 48 (25.3) | 21 (7.1) | 7.54 (3.14-18.07) | Â |
6-11 | 76 (40.0) | 88 (29.8) | 2.85 (1.31-6.16) | 0.008 |
12-23 | 44 (24.4) | 136 (46.1) | 1.06 (0.48-2.34) | 0.87 |
24-59 | 12 (6.3) | 17 (5.8) | 2.32 (0.83-6.48) | 0.10 |
Paternal age (yrs), mean (SD)a | 34.7 (5.8) | 33.3 (5.6) | 1.04 (0.99-1.09) | 0.078 |
Maternal age (yrs), mean (SD)a | 31.0 (5.1) | 29.6 (5.1) | 1.05 (1.00-1.11) | 0.045 |
SES of residence town, n (%)a | Â | Â | Â | Â |
Low | 66 (42.9) | 73 (29.4) | 2.29 (1.32-3.97) | 0.003 |
Intermediate | 60 (39.0) | 104 (41.9) | 1.46 (0.85-2.51) | 0.16 |
High | 28 (18.2) | 71 (28.6) | Reference | Â |
Birth weight, n (%) | Â | Â | Â | Â |
Birth weight < 2500 gra | 6 (4.2) | 14 (6.0) | Reference | 0.44 |
Birth weight ≥ 2500 gr | 138 (95.8) | 221 (94.0) | 1.45 (0.54-3.88) |  |
Birth week, n (%) | Â | Â | Â | Â |
Less than 37Â weeks | 6 (4.3) | 10 (4.6) | Reference | 0.86 |
≥ 37 weeks | 135 (95.7) | 206 (95.4) | 1.09 (0.38-3.07) |  |
Gastroenteritis before admission, n (%) | Â | Â | Â | Â |
Yes | 12 (6.3) | 1 (0.3) | 19.82 (2.55-153.72) | <0.001 |
No | 178 (93.7) | 294 (99.7) | Reference | Â |
Breastfeeding < 1Â yr, n (%) | Â | Â | Â | Â |
Breastfed aged < 1Â yr | 50 (37.3) | 40 (28.2) | Reference | 0.10 |
Not breasted children aged <1Â yr | 84 (62.7) | 102 (71.8) | 0.65 (0.39-1.09) | Â |
Breastfeeding 1–4 yrs, n (%) |  |  |  |  |
Breastfed children age 1-4Â yrs | 9 (16.1) | 8 (5.2) | Reference | Â |
Not breasted children age 1-4Â yrs | 47 (83.9) | 145 (94.8) | 0.28 (0.10-0.78) | 0.011 |