Lung function impairment

Gasoline pump attendant n = 140

Control

n = 140

Statistical test*

Normal

89 (63.6%)

124 (88.6%)

x² = 24.05

Restrictive

39 (27.9%)

12 (8.6%)

P = 0.001

Obstructive

12 (8.6%)

4 (2.9%)