| Controls | Non-chronic arthritis | JIA | |||||
---|---|---|---|---|---|---|---|---|
(n = 10,189) | (n = 105) | OR (95% CI) | p | (n = 29) | OR (95% CI) | p | ||
End of exclusive breastfeeding | ||||||||
 | Months 1-4 (0-120 days) | 3261 (37%) | 27 (34%) | 1 (ref) | 0.700 | 16 (57%) | 1 (ref) | 0.023 |
Months 5-8 (121-240Â days) | 5374 (60%) | 48 (61%) | 0.9 (0.6-1.3) | 0.458 | 12 (43%) | 0.3 (0.1-0.7) | 0.006 | |
Months 9-12 (241-365Â days) | 269 (3%) | 4 (5%) | 1.1 (0.5-2.8) | 0.800 | 0 (0%) | 0 | 0.994 | |
End of total breastfeeding | ||||||||
 | Months 1-4 (0-120 days) | 1579 (15%) | 20 (19%) | 1 (ref) | 0.558 | 11 (38%) | 1 (ref) | 0.003 |
Months 5-8 (121-240Â days) | 3569 (35%) | 34 (32%) | 0.8 (0.4-1.3) | 0.315 | 11 (38%) | 0.4 (0.2-1.0) | 0.056 | |
Months 9-12 (241-365Â days) | 5041 (50%) | 51 (49%) | 0.8 (0.5-1.3) | 0.397 | 7 (24%) | 0.2 (0.1-0.5) | 0.001 |