From: Income and patient-reported outcomes (PROs) after primary total knee arthroplasty
 | 2 years | 5 years | ||||||
---|---|---|---|---|---|---|---|---|
 | Better | Much better | Better | Much better | ||||
 | Odds ratio (95% CI) | P value | Odds ratio (95% CI) | P value | Odds ratio (95% CI) | P value | Odds ratio (95% CI) | P value |
≤ US$35, 000 | 1.9 (1.0 to 3.6) | 0.06 | 1.4 (0.8 to 2.5) | 0.26 | 1.7 (0.8 to 3.4) | 0.16 | 1.5 (0.9 to 2.8) | 0.15 |
> US$35, 000 to US$45, 000 | 1.4 (0.8 to 2.4) | 0.25 | 1.4 (0.9 to 2.3) | 0.14 | 1.2 (0.6 to 2.2) | 0.64 | 1.0 (0.6 to 1.7) | 0.93 |
> US$45, 000 (ref) | 1.00 | Â | 1.00 | Â | 1.00 | Â | 1.00 | Â |