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Table 3 Comparative pre- and post-intervention results on prevalence of WMSDs

From: Assessing the effects of an educational program for the prevention of work-related musculoskeletal disorders among school teachers

Places Pre-intervention Six months post-intervention 12 months post-intervention χ 2 P
n % n % n %
Neck 222 63.43 204 62.20 148 46.40 24.099 0.000
Shoulder 183 52.29 174 53.05 133 41.69 10.470 0.005
Upper back 132 37.71 133 40.55 90 28.21 11.777 0.003
Elbow 46 13.14 46 14.02 37 11.60 0.864 0.649
Lower back 165 47.14 170 51.83 108 33.86 22.763 0.000
Wrist/hand 88 25.14 68 20.73 57 17.87 5.373 0.068
Hip/thigh 58 16.57 48 14.63 39 12.22 2.539 0.281
Knee 93 26.57 85 25.91 81 25.39 0.122 0.941
Ankle/foot 74 21.14 60 18.29 56 17.55 1.578 0.454