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Table 2 The relationship between O3 exposure, TSH level, and TNs

From: Association of Ozone Exposures with the risk of thyroid nodules in Hunan Province: a population-based cohort study

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

  1. Higher groupa, 1-year average O3 concentrations above the threshold (0.0408 ppm); Lower groupb, 1-year average O3 concentrations below the threshold; Higher TSH groupc, TSH level above the threshold (3.2 mIU/L); Lower TSH groupd, TSH level below the threshold
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Environmental Health

ISSN: 1476-069X