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Table 3 One year prevalence of NSP and LBP in relation to individual factors

From: Neck/shoulder pain and low back pain among school teachers in China, prevalence and risk factors

Variable %with NSP (no. of teachers with NSP/Total number) Pvalue %with LBP (no. of teachers with LBP/Total number) Pvalue
Gender   0.01   0.1
Male 42.7 (126/295)   41.7 (123/295)  
Female 51.7 (309/598)   47.5 (284/598)  
Age (yrs)   0.18   0.03
19-29 46.2 (184/398)   41.2 (164/398)  
30-39 48.5 (165/340)   46.8 (159/340)  
40-49 57.5 (73/127)   55.9 (71/127)  
≥50 46.4 (13/28)   46.4 (13/28)  
Seniority (yrs)   0.25   0.16
1-9 46.0 (210/457)   42.7 (195/457)  
10-19 51.5 (151/293)   47.4 (139/293)  
20-29 49.1 (53/108)   48.1 (52/108)  
≥30 60.0 (21/35)   60.0 (21/35)  
Body mass index (kg/m2)   0.44   0.08
≤23.9 49.4 (344/697)   44.5 (310/697)  
24-27.9 43.5 (57/131)   47.3 (62/131)  
≥28 53.5 (8/15)   73.3 (11/15)  
School level   <0.001   <0.001
Primary school 48.9 (137/280)   46.8 (131/280)  
Junior middle school 31.4 (83/264)   28.0 (74/264)  
Senior middle school 61.6 (215/349)   57.9 (202/349)  
  1. χ2 test for categorical variables. Statistically significant differences (P < 0.05) are marked in bold.