Table 1.

Demographics, health, and work characteristics of onshore maintenance petroleum workers (n = 46).

Demographic characteristics	N (%)	Mean (SD)a
Age (years)	46 (100)	29.8 (11.1)
Gender	46 (100)
Female	8 (17.4)
Male	38 (82.6)
Cardiorespiratory fitnessb (ml/kg/min)	46 (100)
Female	8 (17.4)	36.9 (6.4)
Male	38 (84.3)	44.5 (8)
Body mass index (kg/m2)	46 (100)
Female	8 (17.4)	25.5 (4.2)
Male	38 (84.3)	27.3 (4.5)
Marital status	41 (89.2)
Married/partner	21 (45.7)
Not married/living alone	20 (43.5)
Education (years)	46 (100)
High school (up to 3 years)	13 (28.3)
Certificate of completed apprenticeship	29 (63)
College/university	4 (8.7)
Worked in Petroleum industry (years)	46 (100)	6 (6.9)
Work demandsc	46 (100)
Work requires you to work fast	46 (100)	2.5 (0.7)
Work requires you to work hard	46 (100)	2.7 (0.5)
Work requires too much effort	46 (100)	2.5 (0.7)
Work requires ingenuity	46 (100)	3 (0.6)
Decide how to perform your work tasks	46 (100)	3.2 (0.8)
Decide your own work tasks	46 (100)	2.6 (0.6)
Tired after work	46 (100)	2.1 (0.5)
WAId	46 (100)	8.8 (1.4)
Perceived healthe	46 (100)	3.1 (0.4)
Experienced pain at least three consecutive months during the last year	46 (100)
Yes	26 (56.5)
No	20 (43.5)
Regions with pain at least three consecutive months during the last year	10 (21.7)
Neck	8 (17.4)
Shoulders	10 (21.7)
Elbow	2 (4.3)
Wrist and fingers	4 (8.7)
Upper back	3 (6.5)
Lower back	10 (21.7)
Hip	1 (2.2)
Knees	9 (19.6)
Calves	1 (2.2)
Feet and ankles	5 (10.9)
Prevented activities during work because of this pain	3 (6.5)
Sick leave last 12 months	26 (56.5)
<2 weeks	23 (50)
>2 weeks	3 (6.5)
Self-reported leisure-time physical activity	46 (100)
Never	6 (13)
Once a week	11 (23.9)
2–3 times a week	17 (37)
Every day	12 (26)

^aSD = standard deviation.

^b $\dot{\mathbf{V}}{\mathbf{O}}_{2\mathbf{m}\mathbf{a}\mathbf{x}}$ .

^c1 = Never, 2 = No/rarely, 3 = Yes/sometimes 4 = Yes/frequently.

^dWork ability index, 0 = Cannot work, 10 = Best.

^e1 = Poor, 2 = Not that good, 3 = Good, 4 = Very good