Characteristic

Health workers

Petroleum workers

(N = 3084)

(N = 489)

n

%

n

%

Sex

Male

672

19.3

332

68.2

Female

2405

69.1

155

31.8

Age (years)

<30

705

23.0

24

4.9

31 to 45

1454

47.5

249

50.9

46 to 55

587

19.2

186

38.0

56 or more

315

10.3

30

6.1

Schooling level

Fundamental (1 to 9 years)

122

4.0

6

1.2

Medium (10 to 12 years)

1611

53.0

205

42.2

Higher (undergraduate/graduate)

1309

43.0

275

56.6