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Table 2 Odds risk ratio of self-reported knee complaints in 1994/95 and 2005 among 81 floor layers presently working in the trade in 1994/95 relative to graphic designers

From: Knee complaints and consequences on work status; a 10-year follow-up survey among floor layers and graphic designers

Knee complaints Employment in the trade in year 2005 Knee complaints 1995 Knee complaints 2005
   N n (%) ORcrude 95% CI ORadj 95% CI n (%) ORcrude 95% CI ORadj 95% CI
  Presently at work            
  - Floor layers 56 39 (69.6%) 8.5 3.8–18.7 9.2 3.8–22.2 32 (56.1%) 2.2 1.1–4.5 2.7 1.2–5.8
  - Graphic designers 75 16 (21.3%) 1 - 1 - 28 (36.8%) 1 - 1 -
During the past 12 months Presently off work *            
  - Floor layers 16 10 (62.5%) 5.1 1.6–16.3 7.7 2.1–28.9 7 (43.8%) 1.9 0.6–5.9 2.7 0.8–8.9
  - Graphic designers 66 16 (24.2%) 1 - 1 - 19 (28.8%) 1 - 1 -
  Change of occupation            
  - Floor layers 9 8 (88.9%) 27.4 2.9–258.4 26.9 2.7–265.0 7 (70.0%) 7.7 1.4–43.9 11.7 1.1–124.8
  - Graphic designers 32 7 (21.9%) 1 - 1 - 10 (31.3%) 1 - 1 -
  Presently at work            
  - Floor layers 56 23 (41.1%) 5.8 2.3–14.2 5.5 2.2–13.9 15 (26.3%) 1.3 0.6–.2.9 1.4 0.6–3.3
  - Graphic designers 75 8 (10.7%) 1 - 1 - 17 (20.7%) 1 - 1 -
Daily or > 30 days during the past 12 months Presently off work *            
  - Floor layers 16 8 (50.0%) 7.1 2.1–24.3 9.1 2.4–34.4 5 (29.0%) 2.6 0.7–8.9 3.8 1.0–15.0
  - Graphic designers 66 8 (12.1%) 1 - 1 - 10 (16.7%) 1 - 1 -
  Change of occupation            
  - Floor layers 9 5 (55.6%) 11.7 2.0–68.8 15.3 2.1–113.4 5 (50.0%) 8.8 1.6–47.0 13.8 1.7–115.1
  - Graphic designers 32 3 (9.4%) 1 - 1 - 4 (12.5%) 1 - 1 -
  1. * Off work due to early retirement, old – age pension, disability pension, rehabilitation or long illness
  2. OR, odds risk ratio adjusted for seniority, body mass index & earlier knee injuries
  3. CI, confidence interval