Fig. 4From: Patient-reported outcomes in a Chinese cohort of osteogenesis imperfecta unveil psycho-physical stratifications associated with clinical manifestationsPCA and clustering analyses of parental PROMIS data. A Scatter plot showing the first two PCs, with density contours. Red curves indicate saddle and valley between the two peaks/clusters. B Bar charts showing the ordered loading scores for the first and second PC. C Heatmap with clustering showing data in their original values. Marginal ridge plots show the marginal densities either per-patient (row-wise) or per PROMIS-item (column-wise), with an aggregated density for all data points placed on the top right corner. The meanings of the colors were explained by the smile or sad face symbols. The PROMIS items are abbreviated by their categories and a representative keyword. Refer to Additional file 1 for corresponding questions in fullBack to article page