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Table 1 Injury incidence and the relationship between the demographic and behavior characteristics and injuries in a sample of 4,138 students in Shenzhen, China

From: Characteristics and related factors of nonfatal injuries among adolescents and college students in Shenzhen city of China

Variables N Injury Non-injury χ 2 P
   n % n %   
Gender        
  Male 2,134 365 17.10 1,769 82.90 48.02 <0.001
  Female 2,004 195 9.73 1,809 90.27   
Registered permanent residence        
  Local 3,026 414 13.68 2,612 86.32 0.21 0.645
  Non-local 1,112 146 13.13  966 86.87   
BMI Category        
  Normal weight 3,727 492 13.20 3,235 86.80 3.96 0.138
  Overweight  308  49 15.91  259 84.09   
  Obesity  103  19 18.45  84 81.55   
Grade        
  Primary school 2,302 327 14.21 1,975 85.79 2.62 0.270
  Secondary school 1,138 150 13.18  988 86.82   
  College  698  83 11.89  615 88.11   
Self-perceived agrypnia        
  No 1,412 130 9.21 1,282 90.79 57.64 <0.001
  Sometimes 2,260 324 14.34 1,936 85.66   
  Often  466 106 22.75  360 77.25   
Having PE class        
  ≤2 classes/week 2,184 261 11.95 1,923 88.05 9.90 0.002
  >2 classes/week 1,954 299 15.30 1,655 84.70   
Sexual behavior        
  No 3,924 509 12.97 3,415 87.03 20.45 <0.001
  Yes  214  51 23.83  163 76.17   
Trying smoking        
  No 3,074 378 12.30 2,696 87.70 15.62 <0.001
  Yes 1,064 182 17.11  882 82.89   
Alcohol consumption        
  No 1,505 159 10.56 1,346 89.44 17.81 <0.001
  Yes 2,633 401 15.23 2,232 84.77   
Physical fighting        
  No 3,360 368 10.95 2,992 89.05 101.72 <0.001
  Yes  778 192 24.68  586 75.32   
Unsafe cycling        
  No 3,123 355 11.37 2,768 88.63 51.04 <0.001
  Yes 1,015 205 20.20  810 79.80   
Skating in unsafe places        
  No 3,941 510 12.94 3,431 87.06 24.81 <0.001
  Yes  197  50 25.38  147 74.62   
Walking on the zebra crossing or pedestrian overpass or underpass
  No 1,976 313 15.84 1,663 84.16 17.20 <0.001
  Yes 2,162 247 11.42 1,915 88.58   
Swimming in unsafe places        
  No 3,820 491 12.85 3,329 87.15 19.63 <0.001
  Yes  318  69 21.70  249 78.30   
  1. BMI, body mass index; PE, physical education.