Table 1:
Odds ratios for childhood cancer by season of child’s birth using hypothetical data (Cases n = 134, Controls n = 261)
| Season of birthÞ | Odds ratio | 95% Confidence interval |
|---|---|---|
| Winter vs. Spring | 1.2 | (0.68–2.1) |
| Spring vs. Fall | 1.0 | (0.56–1.8) |
| Winter vs. Fall | 1.2 | (0.67–2.2) |
| Winter vs. Summer | 1.8 | (0.99–3.3) |
| Spring vs. Summer | 1.5 | (0.84–2.7) |
| Fall vs. Summer | 1.5 | (0.82–2.8) |
Þ
Spring = {March, April, May}; Summer = {June, July, August}; Fall = {September, October, November}; Winter = {December, January, February}.