Parameters | Total | With TNs | Without TNs | P Value |
---|---|---|---|---|
O3 exposure classification | ||||
 Higher O3 groupa | 94,695 | 42,671(45,1) | 52,024(54.9) | < .001 |
 Lower O3 groupb | 96,662 | 39,230(40.6) | 57,432(59.4) | |
TSH classification | ||||
 Higher TSH groupc | 9689 | 4516 | 5173 | < .001 |
 Lower TSH groupd | 28,392 | 12,276 | 16,116 | |
Higher O3 group | ||||
 With TSH data | 18,214 | 9034 | 9180 |  |
 TSH, median (IQR) |  | 2.21(1.47–3.30) | 2.18(1.48–3.14) | 0.006 |
 Higher TSH group | 4658 | 2448 | 2210 | < .001 |
 Lower TSH group | 13,556 | 6586 | 6970 | |
Lower O3 group | ||||
 With TSH data | 19,867 | 7758 | 12,109 |  |
 TSH, median (IQR) |  | 2.21(1.47–3.3) | 2.20(1.50–3.17) | 0.245 |