Table 3.

Characteristics of enrolled gas and oilfield workers.

Behavior Data
Current smoker, n (%)	15 (18.7%)
Cigarettes/d range	3–5
Alcohol consumption, n (%)	25 (31.25%)
Wine or beer glasses/d	One or twice a day
Complaints
Diarrhea, n (%)	6 (7.55 %)
Abdominal pain, n (%)	5 (6.25%)
Headaches and dizziness, n (%)	4 (5 %)
Cold, n (%)	2 (2.5 %)
Educational grade
Secondary school, n (%)	65 (81.25%)
high school, n (%)	15 (18.75%)
Occupational grade
Coordinator, n (%)	9 (11.25%)
Supervisor, n (%)	12 (15%)
Operator, n (%)	59 (73.75%)
Marital status
Single, n (%)	30 (37.5%)
Married, n (%)	50 (62.5%)