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Table 2 Group average (mean) for measures of Knee injury and Outcome Score (KOOS) scale (0–100) for pain, symptoms, function in daily living (ADL), sport and recreation (Sport_re), and quality of life (QOL)

From: Symptomatic knee disorders in floor layers and graphic designers. A cross-sectional study

KOOS subscales Pain Symptom ADL Sport_re QOL
mean P-value* mean P-value* mean P-value* mean P-value* mean P-value*
Floor layers (n=134) 79.67 < 0.001 81.28 < 0.001 82.22 < 0.001 69.28 0.007 67.57 0.002
Graphic designers (n=120) 89.44   89.57   89.23   78.43   78.53  
Tibio-femoral knee OA**
  yes (n=216) 72.69 < 0.001 71.83 < 0.001 75.08 < 0.001 56.81 < 0.001 53.65 <0.001
  no (n=37) 86.19   87.41   87.26   76.40   75.92  
Patello-femoral knee OA**
  yes (n=220) 78.82 0.009 80.69 0.009 79.32 0.001 62.34 0.007 62.50 0.013
  no (n=33) 85.03   85.80   86.40   75.21   74.19  
MRI-detected meniscal lesion in one or both knees#
  yes (n=74) 82.64 0.220 83.83 0.280 84.35 0.029 72.36 0.073 69.01 0.039
  no (n=50) 81.62   81.76   83.29   69.26   72.34  
  1. * Computed by multivariate analyses and adjusted for covariates (age, BMI, sports, and traumas).
  2. ** One missing.
  3. # Missing 17: seven floor layers and nine graphic designers did not answer the KOOS questionnaire, and one did not respond on all the questions in the primary questionnaire.