Figure 3.
Illustrative example of the nomogram using data from “Patient 1” in the discussion. Scores for each item in the nomogram are marked with a line extending to the Points line on the top of the nomogram. The scores for each item are as follows: contralateral knee OA = 42 points, index knee baseline KL grade of 1 = 39 points, BMI of 35 = 50 points, Average WOMAC total score of 50 = 47 points. When summed, the total nomogram score = 178 points which is equivalent to a 53% probability of developing a KL grade of 3 or 4 in the index knee in the following 4 to 5 years.