Figure 2From: Quantification of the whole-body burden of radiographic osteoarthritis using factor analysis Scree plot. Scree plot using Johnston County Osteoarthritis Project radiographic data. Based on the eigenvalue (the dashed line indicates an eigenvalue of 1.0) and scree plot criteria, a three-, four-, or five-factor solution would be acceptable. Subjective examination based on interpretability and simple structure led the authors to use a four-factor solution.Back to article page