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Table 1 Demographic characteristics of the office workers

From: Prevalence and risk factors of self-reported wrist and hand symptoms and clinically confirmed carpal tunnel syndrome among office workers in China: a cross-sectional study

Items Whole group
(n=969)
Males
(n = 359)
Females
(n = 610)
Age 28.5 (6.39) 29.2 (5.92) 28.1 (6.63)
BMI 20.8 (3.11) 22.2 (3.18) 20.1 (2.79)
Working experience (yr) 6.4 (5.99) 6.8 (5.89) 6.1 (1.77)
Handedness
 Right-handed 892 (92.1%) 322 (89.7%) 570 (93.4%)
 Left-handed 52 (5.4%) 26 (7.3%) 26 (4.3%)
Education
 Secondary or below 106 (10.9%) 39 (10.9%) 67 (11.3%)
 Diploma level 300 (31.0%) 104 (29.0%) 196 (32.1%)
 Bachelor level 418 (43.1%) 172 (47.9%) 246 (40.3%)
 Master level or above 120 (12.4%) 39 (10.9%) 81 (13.3%)
Marital status
 Single 465 (48.0%) 171 (47.6%) 294 (48.2%)
 Married 376 (38.8%) 146 (40.7%) 230 (37.7%)
 Divorced 4 (0.4%) 3 (0.8%) 1 (0.2%)
 Other 95 (9.8%) 30 (8.4%) 65 (10.7%)
Smoking
 Yes 112 (11.6%) 96 (26.7%) * 16 (2.6%) *
 No 823 (84.9%) 250 (69.6%) 573 (93.9%)
Physical exercise
 Yes 456 (47.1%) 202 (56.3%) * 254 (41.6%) *
 No 489 (50.5%) 149 (41.5%) 340 (55.7%)
Working days per week
(d/w, mean (SD))
5.4 (1.39) 5.4 (0.67) 5.4 (1.68)
Daily working hours
(hr/d, mean (SD))
8.3 (1.53) 8.4 (1.71) 8.2 (1.41)
Daily computer use time (hr/d, mean (SD)) 7.9 (2.55) 7.9 (3.03) 7.8 (2.23)
Daily keyboard use time (hr/d, mean (SD)) 6.2 (2.78) 6.0 (3.09) 6.3 (2.56)
Sleep hours per day
(hr/d, mean (SD))
7.3 (1.01) 7.2 (0.88) 7.4 (1.07)
  1. Note: Mean values (SD) present for age, BMI, working experience, working days per week, daily working hours, daily computer and keyboard use and sleep hours per day, while handedness, education level, marriage status, smoking and exercise are expressed as counts (% of respective group). * represents p < 0.05 and means there were significant differences between men and women workers. Abbreviations: BMI body mass index, yr year, SD standard deviation, d/w days per week, hr./d hours per day