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Table 5 Multivariable analysis of post-operative (12 months) changes in WOMAC domains

From: Factors affecting the quality of life after total knee arthroplasties: a prospective study

WOMAC *

 

Pain

Function

Stiffness

Variables

Diff† (95%CI)

P-value

Diff (95%CI)

P-value

Diff (95%CI)

P-value

Gender (Male vs Female)

0.02 (-0.84, 0.88)

0.2

1.30 (-1.68, 4.28)

0`.4

-0.15 (-0.52, 0.23)

0.4

Age (< 65 vs ≥65)

-0.48 (-1.28, 0.31)

0.9

-2.47 (-5.23, 0.28)

0.07

-0.18 (-0.53, 0.17)

0.3

BMI <30 vs ≥30

-0.15 (-0.85, 0.54)

0.6

-0.97 (-3.41, 1.46)

0.4

-0.06 (-0.37, 0.24)

0.4

Education (Low§ vs High)

-0.72 (-1.69, 0.44)

0.06

-3.08 (-6.76, 0.59)

0.09

-0.16 (-0.70, 0.28)

0.8

Social Support (Yes vs No)

-0.86 (-1.82, 0.09)

0.07

-2.24 (-5.55, 1.06)

0.1

-0.17 (-0.59, 0.25)

0.4

Residence (Rural vs Urban/semi)

-0.52 (-1.10, 0.42)

0.05

-2.25 (-4.87, 0.38)

0.09

-0.15 (-0.59, 0.22)

0.06

Pre-intervention Pain

0.10 (2.29, 0.02)

0.02

-

-

-

-

Pre-intervention Function

-

-

0.17 (0.06, 0.28)

0.002

-

-

Pre-intervention Stiffness

-

-

-

-

0.07 (-0.02, 0.17)

0.1

  1. * WOMAC scores: pain 0–20, function 0–68, stiffness 0–8; higher scores indicate greater difficulty.
  2. † Estimated differences between categories after adjustment by all other variables.
  3. § Elementary or less; - Not applicable.