The observed means for lung function, the prediction curves, and predicted values for black and white miners
| Lung function | Observed values | Regression coefficient (SE) | R2(%) | SEE | Prediction, age 40, height 1.7 m | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean | SE | Intercept | Age | Height | |||||||||
| Black miners n=15772, age 38.7 (SE 0.06), height 1.71 m (SE 0.005): | |||||||||||||
| FVC (l) | 4.10 | 0.005 | −2.901 (0.120) | −0.025 (0.001) | 4.655 (0.068) | 33.5 | 0.528 | 4.02 | |||||
| FEV1(l) | 3.44 | 0.005 | −1.654 (0.109) | −0.030 (0.001) | 3.665 (0.061) | 35.5 | 0.477 | 3.38 | |||||
| FEF (l/s) | 3.96 | 0.010 | 1.363 (0.274) | −0.056 (0.001) | 2.780 (0.154) | 14.6 | 1.200 | 3.86 | |||||
| FEV1% | 84.1 | 0.055 | 102.56 (1.511) | −0.237 (0.007) | −5.437 (0.848) | 7.24 | 6.627 | 83.8 | |||||
| White miners n=2752, age 36.9 (SE 0.06), height 1.80 m (SE 0.001): | |||||||||||||
| FVC (l) | 4.96 | 0.016 | −4.407 (0.339) | −0.036 (0.001) | 5.940 (0.182) | 44.1 | 0.547 | 4.24 | |||||
| FEV1 (l) | 4.04 | 0.014 | −2.341 (0.300) | −0.038 (0.001) | 4.314 (0.161) | 43.4 | 0.484 | 3.49 | |||||
| FEF (l/s) | 4.14 | 0.024 | 0.824 (0.640) | −0.050 (0.002) | 2.866 (0.344) | 16.8 | 1.039 | 3.70 | |||||
| FEV1% | 81.7 | 0.129 | 107.68 (3.601) | −0.172 (0.014) | −10.932 (1.94) | 5.8 | 6.555 | 82.2 | |||||