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Table 3 Risk score model of KOA incident prediction

From: Development of a model for predicting the 4-year risk of symptomatic knee osteoarthritis in China: a longitudinal cohort study

Predictors Risk score Predictors Risk score
Age (years)   Depression  
 45–49 0 No 0
 50–59 1 Mild 7
 60–69 3 Moderate-to-severe 12
  ≥ 70 0 Comorbidities  
Sex   None 0
 Male 0 1 ~ 2 2
 Female 5 ≥3 4
Waist circumference, cm in male/female   Health Status  
  < 85/80 0 Very good 0
  ≥ 85/80 1 Good 1
Residence Area   Fair 8
 Urban 0 Poor 11
 Rural 2 Very poor 13
ADLs/IADLs difficulty   MPA score  
 No 0 No PA 0
 Yes 4 Low level 3
Hip fracture   Middle-to-high level 3
 No 0   
 Yes 4   
  1. Total score of 0 indicates lowest risk and score of 51 indicates greatest risk
  2. A cut-off of 20.5 was identified, which meant patients with a 20.5 or more total risk scores were at the greatest risk to develop symptomatic KOA in 4 years
  3. The incident probability of KOA within 4 years was calculated by the total risk score divided by 51 and multiplied by 100%
  4. MPA moderate physical activity, AD activities of daily living, IADL instrumental activities of daily living