Table 5

Factors associated with poor self-reported Physical Functioning in TKA participants (verified)

Difference in MOS-PF from reference
Age (years)
 45–54Reference
 55–64−2.1 (−8–3.9)
 65–740.5 (−5.4–6.4)
 75–84−5.5 (−11.5–0.6)
 85+−17.4 (−24.7–−10.2)
Sex
 MaleReference
 Female−11.6 (−13.8–−9.5)
Education level
 Less than high schoolReference
 High school−0.2 (−3.9–3.5)
 Trade/apprenticeship0.1 (−2.2–2.4)
 University degree4.2 (0.9–7.5)
Income/year
 <$20kReference
 $20–49k2.5 (−0.1–5)
 $50–69k4 (−0.4–8.3)
 $70k+2.7 (−1.4–6.7)
 Rather not say2 (−0.9–4.8)
Self-related health
 Excellent or goodReference
 Fair or poor−20 (−22.5–−17.5)
Number of conditions−1.6 (−2.2–−0.9)
Private health insurance status
 NoneReference
 Private w/extras0.7 (−2.9–4.3)
 Private no extras−0.9 (−4.9–3.2)
 DVA healthcare−10.5 (−16.2–−4.9)
 Health care−4.7 (−8.6–−0.8)
Used paracetamol in the last week
 NoReference
 Yes−5.1 (−7.2–−3)
Level of psychological distress (K10)
 LowReference
 Moderate−5.7 (−8.6–−2.8)
 High/very high−10.6 (−14.6–−6.5)
Treated for osteoarthritis in last month
 NoReference
 Yes−6.4 (−8.7–−4.1)
BMI category
 Healthy weightReference
 Underweight (<18.5)−10.6 (−23.4–2.3)
 Overweight (25–29)−0.6 (−3.4–2.3)
 Obese (30+)−6.3 (−9.2–−3.4)
PA sessions/week
 0–3 sessionsReference
 4–9 sessions12.7 (9.9–15.5)
 10–17 sessions17.4 (14.5–20.3)
 18+ sessions19 (15.5–22.6)
Time since TKA
 1Reference
 2−1.8 (−6–2.5)
 3−4 (−8.2–0.2)
 4−2.4 (−6.8–2)
 5−2.5 (−7–2)
 6+−5.5 (−9.5–−1.5)
Model fit
 Pseudo R20.627
Summary
 N2916
 n at lower bound (0)72
 n at upper bound (100)108
  • BMI, body mass index; PA, physical activity; TKA, total knee arthroplasty.