Fig. 9From: Validation and psychometric properties of the Somatic and Psychological HEalth REport (SPHERE) in a young Australian-based population sample using non-parametric item response theorySummary of NIRT item validation and selection. Items from the original scales are indicated by an x. Items included in the new version of the scales are indicated by a rectangle of colour. Items not present in any scale after the reduction to 21 items appear in light grey Back to article page