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Table 3 Scoring formula and the observed probability of required rehabilitation duration

From: Identifying factors predicting prolonged rehabilitation after simultaneous bilateral total knee arthroplasty: a retrospective observational study

Scoring formula Outcomes
Factors Points Total score n Compliance group Delayed group Observed probability of required rehabilitation duration conformance, %
  +  10 0–1 1 0 1 0.0%
Age, (years) × −0.09 1–2 9 2 7 22.2%
BMI × −0.09 2–3 40 20 20 50.0%
Living alone × −0.56 3–4 74 52 22 70.3%
KSS: stairs × 0.03 4–5 47 41 6 87.2%
Hemoglobin, g/dL × 0.34 5–6 13 11 2 84.6%
ASA class × −1.1 6–7 7 6 1 85.7%
  1. n number, KSS knee society score, BMI body mass index