Table 4.
Lung function estimates in the linear mixed model analysis according to monthly exposure time to extreme cold temperatures
| Parameter | Intercept at 1st examination (95% CI) | Difference (p-value) | Slope (95% CI) | |
|---|---|---|---|---|
| ≤ 16 h | > 16 h | |||
| FEV1 (%-pred.) | 95.52 (90.30–100.73) | 94.70 (90.28–99.13) | 0.82 (p = 0.809) | 0.32 (0.15 to 0.48) |
| FVC (%-pred.) | 95.68 (90.99–100,37) | 98.36 (94.39–102.34) | − 2.67 (p = 0.379) | 0.43 (0.28 to 0.57) |
| FEV1/FVC (%-pred.) | 98.73 (96.14–101.32) | 95.69 (93.50–97.88) | 3.04 (p = 0.075) | − 0.07 (− 0.13 to 0.00) |
| DL,CO (%-pred.) | 93.85 (87.55–100.15) | 95.19 (89.52–100.87) | − 1.34 (p = 0.748) | − 0.10 (− 0.42 to 0.22) |
| DL,CO VA (%-pred.) | 93.93 (87.96–99.90) | 95.66 (90.31–101.01) | − 1.73 (p = 0.661) | 0.27 (− 0.07 to 0.61) |
CI: confidence interval, DL,CO: diffusion capacity for CO, DL,CO/VA: Krogh-factor, FEV1: forced expiratory volume in the first second, FEV1/FVC: Tiffeneau-Index, FVC: forced vital capacity, SD: standard deviation