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Correlation of smoking with pulmonary function in coal-mine drillers with different cumulative total dust exposure.
| Smoking subgroup | Non-smoking subgroup | |||
|---|---|---|---|---|
| Index | r | P-value | r | P-value |
| FVC | −0.013 | 0.064 | −0.049 | 0.519 |
| FEV1 | −0.184 | 0.009 | −0.031 | 0.681 |
| FEV1/FVC | −0.083 | 0.241 | −0.035 | 0.645 |
FVC, forced vital capacity; FEV1, forced expiratory volume in one second.
