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Table 4 1-week symptom prevalence (bold font) with 95% confidence interval (95%-Cl) and total number of affected employees classified according to age groups. (prev.=prevalence)

From: Musculoskeletal symptoms of the upper extremities and the neck: A cross-sectional study on prevalence and symptom-predicting factors at visual display terminal (VDT) workstations

1-week prevalence Symptoms of neck Symptoms of shoulder Symptoms of elbow/forearm Symptoms of hand/wrist
    Prev. (%) 95%-CI n Prev. (%) 95%-CI n Prev. (%) 95%-CI n Prev. (%) 95%-CI n
Female, n = 379 Total female 28.0 23.4, 32.5 106 19.3 15.3, 23.2 73 4.0 2.0, 5.9 15 7.9 5.2, 10.6 30
  Age group < 30 30.7 21.0, 40.3 27 17.0 9.2, 24.9 15 1.1 * 1 4.5 * 4
   30–39 27.7 19.7, 35.8 33 15.1 8.7, 21.5 18 3.4 * 4 7.6 * 9
   40–49 29.0 20.4, 37.6 31 22.4 14.5, 30.3 24 3.3 * 7 9.3 3.8, 14.9 10
   50–59 23.1 12.8, 33.3 15 24.6 14.1, 35.1 16 4.6 * 3 10.8 * 7
Male, n = 678 Total male 16.4 13.5, 19.0 111 13.1 10.5, 15.5 89 5.5 3.7, 7.1 37 5.9 4.1, 7.6 40
  Age group < 30 16.3 8.2, 24.3 13 8.8 * 7 1.3 * 1 2.5 * 2
   30–39 12.7 8.5, 16.9 31 9.8 6.1, 13.5 24 3.3 * 8 5.3 2.5, 8.1 13
   40–49 13.2 8.4, 17.7 29 12.7 8.0, 17.5 28 5.9 2.6, 9.3 13 5.9 2.6, 9.3 13
   50–59 28.4 20.8, 36.0 38 22.4 15.3, 29.5 30 11.2 5.9, 16.5 15 9.0 4.2, 13.7 12
All n = 1,057 20.5 18.0, 22.8 217 15.3 13.0, 17.4 162 4.9 3.6, 6.2 52 6.6 5.1, 8.1 70
  1. * due to the small prevalence, a 95%-CI could not be calculated [38]