Table 1.

List of non-imaging variables fed into logistic regression models to make predictions of whether a patient would undergo TKR within 5 years. Abbreviations used: Body Mass Index (BMI), Nonsteroidal Anti-inflammatory drugs (NSAIDS), Blood Pressure (BP), Physical Activity Scale for the Elderly (PASE), Knee Injury and Osteoarthritis Outcome Score (KOOS), Quality of Life (QOL), Western Ontario and McMaster Universities Arthritis Index (WOMAC), Short Form 12 (SF-12).

Non-imaging variables used to augment image-based predictions
Age	Comorbidity score
BMI	Injections to treat arthritis in previous 6 months
Education	Seen physician for arthritis in previous year
Ethnicity	Knee valgus negative alignment (degrees)
Income	Isometric leg strength
NSAID usage	Back pain in previous 30 days
Analgesics usage	Difficulty squatting in previous 7 days
Systolic BP	Difficulty kneeling in previous 7 days
Considering TKR	Baseline frequent knee pain status
PASE	Previous knee injury that limited walking
KOOS QOL	0-10 global rating assessing effect of knee pain
KOOS pain	SF-12 physical component score
WOMAC pain	SF-12 mental component score
WOMAC disability