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Table 1 Demographic, life style and work characteristics of primary (n = 1003), junior secondary (n = 559) and senior secondary teachers (n = 170) in Botswana

From: Low back pain among school teachers in Botswana, prevalence and risk factors

Characteristics Primary school teachers Junior secondary school teachers Senior secondary school teachers Overall
  % % % %
Gender     
Male 17.0 39.2 48.2 27.3
Female 83.0 60.8 51.8 72.7
Age (years)
≤30 15.6 34.3 10.2 21.1
31-40 29.5 49.4 53.6 38.3
41-50 40.4 14.1 31.7 31.0
>50 14.5 2.2 5.4 9.6
Body mass index     
<18.5 5.0 7.1 3.7 5.6
18-24.9 35.7 51.9 43.7 42.1
25-29.9 29.3 25.1 34.8 28.5
≥30 30.0 15.9 17.8 23.9
Marital status     
Single 53.8 54.7 42.4 53.0
Married 38.7 42.8 50.6 41.2
Separated/divorced/widowed 7.5 2.5 7.1 5.8
Education level     
Certificate 9.2 0.2 0.6 5.4
Diploma 71.7 53.1 0.6 58.7
Bachelors’ degree 19.1 46.7 98.8 35.9
Number of children less than 6 years     
1 73.9 72.5 73.0 73.2
≥2 26.1 27.5 27.0 26.8
Hours of physical exercise per week (hours)     
≤5 89.5 84.3 84.6 87.2
>5 10.5 15.7 15.4 12.8
Length of employment (years)     
≤10 38.0 68.9 42.9 48.4
11-20 34.0 28.3 47.1 33.4
21-30 24.1 2.5 8.8 15.6
>30 3.9 0.4 1.2 2.5
Work hours per week (hours)     
40 88.8 85.7 83.5 87.3
>40 11.2 14.3 16.5 12.7
Number of students taught on average     
≤25 5.2 25.8 9.4 12.2
26-30 20.4 8.1 4.7 14.9
31-35 39.4 11.3 15.3 27.9
36-40 32.6 32.6 55.9 34.9
>40 2.4 22.4 14.7 10.0
Extracurricular activities     
No 22.6 45.8 55.9 33.4
Yes 77.4 54.2 44.1 66.6