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Table 3 Association between the study participants’ characteristics and the WOMAC scores 6 months after total knee arthroplasty (n = 138)

From: Determinants of pain, functional limitations and health-related quality of life six months after total knee arthroplasty: results from a prospective cohort study

WOMAC SCORE 6 MONTHS AFTER TKA β 95% CI p value
Pain score (R 2= 0.11)    
  WOMAC pain score before surgery (%) 0.25 0.08 to 0.41 0.004
  Cruciate retaining implant§ - 8.21 −15.01 to −1.34 0.02
  Number of in-hospital complications - 5.96 −10.76 to −1.16 0.01
Function score (R 2= 0.16)    
  WOMAC function score before surgery (%) 0.35 0.16 to 0.54 <0.001
  Marital status (single, separated, divorced or widowed) ° - 6.84 −12.74 to −0.95 0.02
  Occupational status (unemployed or retired) Δ - 7.77 −14.70 to −0.87 0.03
  Number of in-hospital complications - 5.04 −9.83 to −0.26 0.04
  1. TKA: Total knee arthroplasty.
  2. Stepwise multiple regression analysis.
  3. Multivariate unstandardized linear regression coefficients. For each unit of the participants’ characteristics, there is in average a β increase (+) or a decrease (−) on the WOMAC score at 6 months after TKA. A positive β has a positive effect on the participants’ condition and a negative β has a negative effect.
  4. WOMAC pain and function scores before surgery treated as continuous variables. Higher pain or function scores signify better patient status.
  5. Other independent variables are categorical.
  6. § Cruciate retaining compared to postero-stabilized implant.
  7. Reference category = 0 complication compared to 1 and ≥ 2 complications.
  8. ° Single, separated, divorced or widowed compared to married or common law status.
  9. ΔUnemployed or retired compared to employed.