Variable

Occupational Group

N

Mean

SD

P Value

Blood lead levels

Welding and metal

42

54.25

26.94

Paint and pigment

38

49.36

20.73

Radiator and auto mechanic

37

48.89

24.13

Battery worker

37

52.59

28.05

NS

Petrol worker

36

46.16

22.46

Total

190

50.37

24.58