Table 4.
Distribution of Lung Function Test Results by Occupation and Smoking Status
| Study factor | Spray painters Mean ±SD | Controls Mean ±SD | p-value |
|---|---|---|---|
| All participants | |||
| Total number of subjects (n) | 120 | 120 | |
| FVC (liters) | 3.6±0.6 | 3.7±0.5 | 0.046 |
| FVC % of predicted values | 93.9±10.8 | 96.7±8.2 | <0.001 |
| FEV1 (liters) | 3.1±0.6 | 3.3±0.5 | 0.002 |
| FEV1% of predicted values | 94.6±12.2 | 100.3±9.1 | <0.001 |
| FEV1/FVC | 85.5±8.7 | 87.9±6.2 | 0.005 |
| Non-smokers | |||
| Total number of subjects (n) | 106 | 94 | |
| FVC (liters) | 3.7±0.6 | 3.8±0.44 | 0.087 |
| FVC % of predicted values | 94.40±10.9 | 96.79±8.5 | 0.083 |
| FEV1 (liters) | 3.1±0.6 | 3.3±0.5 | 0.002 |
| FEV1% of predicted values | 94.8±12.2 | 100.6±9.6 | <0.001 |
| FEV1/FVC | 85.4±8.5 | 88.4±6.2 | 0.006 |
| Ever-smokers | |||
| Total number of subjects (n) | 14 | 26 | |
| FVC | 3.2±0.4 | 3.6±0.6 | 0.030 |
| FVC % of predicted values | 89.9±9.4 | 96.6±7.2 | 0.016 |
| FEV1 | 2.8±0.6 | 3.1±0.4 | 0.071 |
| FEV1% of predicted values | 93.4±12.3 | 99.0±6.7 | 0.069 |
| FEV1/FVC | 85.9±10.6 | 86.0±6.0. | 0.961 |
Abbreviations: SD, standard deviation