. 2018 Aug 23;7(10):1090–1095. doi: 10.1530/EC-18-0185
This work is licensed under a Table 2.
Cox regression of the association between month and season of birth and risk of Graves´ disease and toxic nodular goitre, respectively, as compared to controls.
| Month/season | Hazard ratio, 95% CI5 | |
|---|---|---|
| GD3 | TNG4 | |
| January1 | 1.00 (0.95–1.05) | 0.90 (0.91–1.05) |
| February1 | 0.99 (0.94–1.05) | 0.99 (0.92–1.06) |
| March1 | 1.02 (0.97–1.08) | 1.01 (0.95–1.08) |
| April1 | 1.02 (0.47–1.07) | 1.00 (0.93–1.06) |
| May1 | 1.00 (0.95–1.05) | 1.00 (0.93–1.07) |
| June1 | 1.03 (0.97–1.07) | 1.05 (0.98–1.12) |
| July1 | 1.04 (0.99–1.09) | 1.02 (0.90–1.1) |
| August1 | 1.00 (0.96–1.06) | 0.99 (0.93–1.06) |
| September1 | 1.04(0.99–1.04) | 1.01 (0.95–1.08) |
| October1 | 0.99 (0.94–1.04) | 1.02 (0.95–1.09) |
| November1 | 0.95 (0.90–1.00) | 1.04 (0.97–1.11) |
| Spring2 | −0.002 (−0.031–0.026) | 1.01 (0.98–1.05) |
| Summer2 | 0.004 (−0.02–0.038) | 1.03 (0.99–1.08) |
| Autumn2 | −0.017 (−0.047–0.012) | 1.03 (0.99–1.08) |
1Reference month December. 2Reference season winter. 3Graves’ disease. 4Toxic nodular goitre. 5Confidence interval.