Table 3.

External Validation for the Prediction of Incident Frequent Knee Pain in Rotterdam Study-III-1

Candidate PredictorStudy Population (n = 236)
OR (95% CI)P Value
Age (years)1.01 (0.89–1.15).88
BMI (kg/m2)1.08 (0.98–1.18).13
Mild knee symptoms*1.80 (0.84–3.87).13
Knee problems while climbing stairs2.14 (0.95–4.82).07
Morning stiffness1.65 (0.66–4.16).29
Postmenopausal status0.98 (0.36–2.69).96
Physically demanding work§1.14 (0.49–2.66).76
AUC of the model0.71 (0.62–0.79)
Calibration: Hosmer-Lemeshow P value.57
Variance explained (Nagelkerke), %12.2
  • AUC, area under the curve of the receiver operating characteristic; BMI, body mass index; CI, confidential interval; OR, odds ratio.

  • * Pain in or around the knee within the last 12 months.

  • Defined with the Knee Injury and Osteoarthritis Outcome Score (KOOS) on physical functioning.

  • Defined with the KOOS on stiffness.

  • § Defined as doing intense work (regularly lifting heavy objects at work).