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Table 2 Prevalence of pain and function outcomes by income category

From: Income and patient-reported outcomes (PROs) after primary total knee arthroplasty

  Moderate to severe pain Moderate to severe functional limitation Overall knee status
    Better Much better
2 years:     
≤ US$35, 000 5.7% 19.6% 10.9% 85.7%
> US$35, 000 to US$45, 000 6.7% 22.9% 8.8% 87.5%
> US$45, 000 8.2% 23.1% 8.5% 87.6%
5 years:     
≤ US$35, 000 7.2% 28.0% 9.4% 85.6%
> US$35, 000 to US$45, 000 7.5% 29.7% 9.3% 85.4%
> US$45, 000 8.2% 29.6% 9.7% 84.4%