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Table 2 Spirometry data of employees with selected occupations (prevalence 3 % or more)

From: Drillers and mill operators in an open-pit gold mine are at risk for impaired lung function

Occupations FVC, % pred. FEV1, % pred. FEV1/FVC, %
Overall NS S Overall NS S Overall NS S
Heavy-duty vehicles operators 107.8 ± 13.3 106.7 ± 13.8 108.1 ± 13.1 98.0 ± 12.9 98.1 ± 13.5 97.9 ± 12.8 75.1 ± 6.5 76.0 ± 5.4 74.9 ± 6.7
Other drivers 109.1 ± 13.6 109.4 ± 14.8 108.9 ± 13.3 100.3 ± 13.2 101.3 ± 13.3 99.9 ± 13.2 75.2 ± 6.0 75.9 ± 5.3 75.0 ± 6.3
Mechanics 109.1 ± 12.5 110.6 ± 11.2 108.7 ± 12.8 99.3 ± 12.4 101.3 ± 12.1 98.8 ± 12.5 75.9 ± 7.0 77.7 ± 7.0 75.9 ± 6.9
Cleaners 116.8 ± 13.4 116.9 ± 13.5 116.6 ± 13.4 105.3 ± 12.4 105.7 ± 12.6 103.6 ± 11.7 77.5 ± 5.7 77.9 ± 5.8 75.8 ± 5.1
Security staff 109.8 ± 11.2 110.0 ± 10.2 109.7 ± 11.6 99.7 ± 11.2 101.1 ± 11.0 99.1 ± 11.2 75.2 ± 5.0 76.4 ± 6.3 74.7 ± 4.4
Drillers 105.7 ± 12.5 103.5 ± 11.9 106.5 ± 12.6 97.8 ± 13.2 94.9 ± 11.3 98.8 ± 13.7 76.7 ± 7.2 75.8 ± 4.7 77.0 ± 7.9
Office staff 108.5 ± 13.3 108.0 ± 13.5 108.8 ± 13.3 100.4 ± 12.9 101.8 ± 13.9 99.6 ± 12.3 77.7 ± 7.1 79.1 ± 8.5 76.3 ± 5.9
Engineers 108.2 ± 13.2 110.8 ± 17.4 105.3 ± 11.8a 101.2 ± 16.0 115.2 ± 17.7 96.6 ± 12.8a 77.7 ± 7.2 80.8 ± 3.6 76.7 ± 7.8
Food handlers 113.0 ± 13.1 115.4 ± 12.6 106.6 ± 12.8a 99.4 ± 11.8 101.6 ± 12.3 93.9 ± 8.2a 75.5 ± 7.1 75.8 ± 7.4 74.8 ± 6.4
Mill operators, including grinder operators and metallurgists 108.5 ± 12.4 109.9 ± 12.1 107.8 ± 12.8 98.7 ± 13.4 100.5 ± 14.7 97.7 ± 12.9 75.0 ± 7.4 75.1 ± 7.0 74.7 ± 7.6
  1. NS never smokers, S smokers and ex-smokers. Heavy-duty vehicles operators include mine truck operators, bulldozer, grader and loader/shovel operators; a significant difference when compared to never-smokers. Data presented as mean ± standard deviation