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Table 1 Socio-professional characteristics of workers

From: Effects of noise exposure among industrial workers in power plants of the National Electricity Company in N’Djamena, Chad

 

n

%

Sex

 Male

88

95.7

 Female

4

4.3

Total

92

100.0

Age range (year)

 30–39

40

43.5

 40–50

23

25.0

 20–29

17

18.5

 > 50

12

13.0

Total

92

100.0

Level of study

 Secondary level or higher

83

90.2

 Primary level

5

5.4

 Uneducated

4

4.3

Total

92

100.0

Information on security measures

 Yes

92

100.0

 No

0

0.0

Total

92

100.0

Security training

 Yes

47

51.1

 No

45

48.9

Total

92

100.0

Duration of exposure (year)

 0–5

31

33.7

 11–20

27

29.3

 6–10

22

23.9

 > 20

12

13.0

Total

92

100.0

Type of exposure

 Intermittent exposure

83

90.2

 Continuous exposure

9

9.8

Total

92

100.0

Daily hourly time

 > 8 h

47

51.1

 < 8 h

39

42.4

 8 h

6

6.5

Total

92

100.0