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Table 1 Characteristics of the study population

From: Work related complaints of neck, shoulder and arm among computer office workers: a cross-sectional evaluation of prevalence and risk factors in a developing country

  All Males Females
Province (number required*)    
   Western (1100) 1116 (50.5%) 548 (48.8%) 568 (52.2%)
   Central (240) 280 (12.7%) 92 (8.2%) 188 (17.3%)
   Sabaragamuwa (140) 170 (7.7%) 90 (8.1%) 80 (7.4%)
   North-Western (160) 164 (7.4%) 80 (7.1%) 84 (7.7%)
   Southern (160) 162 (7.3%) 82 (7.3%) 80 (7.4%)
   Eastern (80) 84 (3.8%) 76 (6.8%) 8 (0.7%)
   Northern (70) 84 (3.8%) 76 (6.8%) 8 (0.7%)
   North-Central (80) 82 (3.7%) 42 (3.7%) 40 (3.7%)
   Uva (60) 68 (3.1%) 36 (3.2%) 32 (2.9%)
Age    
   < 20 years 100 (4.5%) 26 (2.3%) 74 (6.8%)
   20 - 29 years 1062 (48.0%) 522 (46.5%) 540 (49.6%)
   30 - 39 years 740 (33.5%) 400 (35.7%) 340 (31.2%)
   40 - 49 years 196 (8.9%) 104 (9.3%) 92 (8.5%)
   = 50 years 112 (5.1%) 70 (6.2%) 42 (3.9%)
Number of working years in current position    
   1 to 5 years 1670 (75.6%) 846 (75.4%) 824 (75.7%)
   6 to 10 years 210 (9.5%) 116 (10.3%) 94 (8.6%)
   11 to 15 years 192 (8.7%) 84 (7.5%) 108 (10.0%)
   15 years and more 138 (6.2%) 76 (6.8%) 62 (5.7%)
Number of working hours with computer/day    
   2 to 5 hrs 532 (24.1%) 230 (20.5%) 302 (27.8%)
   6 to 9 hrs 978 (44.2%) 512 (45.6%) 466 (42.8%)
   > 9 hrs 700 (31.7%) 380 (33.9%) 320 (29.4%)
  1. * Number required from each province, based on percentage computer usage in each province and total provincial population (PPS method)