Table 4 Results of stratified analyses by adiposity traits for the association between exposure to air pollution and free thyroxine
Abdominal adiposity | Exposure | FT4 (ng/dL) | |||||||
|---|---|---|---|---|---|---|---|---|---|
Normal adiposity | High adiposity | ||||||||
Crude Model | Adjusted Modela | Crude Model | Adjusted Modela | ||||||
β (SE) | p | β (SE) | p | β (SE) | p | β (SE) | p | ||
WC (cm) | Sample n | WC < 90 cm (n = 1016) | WC ≥ 90 cm (n = 1424) | ||||||
PM10 (μg/m3) | 0.0004 (0.0070) | 0.9515 | − 0.0004 (0.0072) | 0.9511 | − 0.0113 (0.0059) | 0.0530 | − 0.0098 (0.0061) | 0.1063 | |
NO2 (ppb) | − 0.0097 (0.0062) | 0.1168 | − 0.0123 (0.0063) | 0.0507 | − 0.0086 (0.0050) | 0.0836 | − 0.0085 (0.0051) | 0.0919 | |
SO2 (ppb) | − 0.0035 (0.0064) | 0.5861 | − 0.0036 (0.0064) | 0.5713 | 0.0012 (0.0052) | 0.8217 | 0.0004 (0.0052) | 0.9425 | |
CO (ppm) | − 0.0006 (0.0082) | 0.9373 | − 0.0024 (0.0083) | 0.7757 | − 0.0135 (0.0065) | 0.0393 | − 0.0133 (0.0066) | 0.0443 | |
VAT (cm2) | Sample n | VAT < 100 cm2 (n = 678) | VAT ≥ 100 cm2 (n = 1762) | ||||||
PM10 (μg/m3) | 0.0093 (0.0089) | 0.2966 | 0.0107 (0.0092) | 0.2471 | − 0.0112 (0.0052) | 0.0314 | − 0.0119 (0.0054) | 0.0275 | |
NO2 (ppb) | 0.0064 (0.0074) | 0.3844 | 0.0066 (0.0075) | 0.3777 | − 0.0146 (0.0045) | 0.0013 | − 0.0166 (0.0046) | 0.0004 | |
SO2 (ppb) | 0.0093 (0.0079) | 0.2390 | 0.0083 (0.0079) | 0.2949 | − 0.0044 (0.0047) | 0.3558 | − 0.0044 (0.0047) | 0.3528 | |
CO (ppm) | 0.0029 (0.0101) | 0.7728 | 0.0012 (0.0102) | 0.9093 | − 0.0119 (0.0060) | 0.0456 | − 0.0135 (0.0060) | 0.0249 | |
SAT (cm2) | Sample n | SAT < 100 cm2 (n = 543) | SAT ≥ 100 cm2 (n = 1897) | ||||||
PM10 (μg/m3) | − 0.0018 (0.0103) | 0.8647 | 0.0016 (0.0107) | 0.8843 | − 0.0067 (0.0050) | 0.1788 | − 0.0071 (0.0052) | 0.1719 | |
NO2 (ppb) | − 0.0013 (0.0085) | 0.8815 | − 0.0012 (0.0087) | 0.8909 | − 0.0105 (0.0043) | 0.0157 | − 0.0121 (0.0044) | 0.0064 | |
SO2 (ppb) | 0.0092 (0.0083) | 0.2680 | 0.0093 (0.0083) | 0.2621 | − 0.0036 (0.0047) | 0.4415 | − 0.0041 (0.0047) | 0.3790 | |
CO (ppm) | 0.0007 (0.0112) | 0.9513 | − 0.0000 (0.0112) | 0.9966 | − 0.0105 (0.0058) | 0.0700 | − 0.0116 (0.0058) | 0.0467 | |
VSR | Sample n | VSR < 1.0 (n = 1379) | VSR ≥ 1.0 (n = 1061) | ||||||
PM10 (μg/m3) | 0.0053 (0.0060) | 0.3831 | 0.0069 (0.0063) | 0.2676 | − 0.0201 (0.0067) | 0.0028 | − 0.0220 (0.0070) | 0.0017 | |
NO2 (ppb) | 0.0000 (0.0053) | 0.9960 | − 0.0002 (0.0054) | 0.9663 | − 0.0188 (0.0057) | 0.0009 | − 0.0207 (0.0058) | 0.0004 | |
SO2 (ppb) | 0.0055 (0.0057) | 0.3315 | 0.0045 (0.0057) | 0.4296 | − 0.0066 (0.0058) | 0.2612 | − 0.0052 (0.0058) | 0.3724 | |
CO (ppm) | 0.0012 (0.0070) | 0.8689 | 0.0007 (0.0071) | 0.9245 | − 0.0190 (0.0076) | 0.0123 | − 0.0210 (0.0076) | 0.0059 | |