The eight performance-based tests based on items of the BASFI included: climbing stairs (no. 1), bending (no. 2), reaching up (no 3), putting on socks (no. 4), reclining and declining from a chair (no. 5), getting up from the floor (no. 6), looking over the shoulder (no. 7) and a physically demanding activity (no. 8) as previously described by van Weely et al. [ 22].
To understand the association between exercise recommendation barriers and exercise recommendations, we analyzed the percent of oncologists' exercise recommendation based on items of oncologists' exercise recommendation barriers.
We are aware of several rules developed or validated in a primary care setting and based on items of the medical history and clinical examination.
The WDQ has been developed based on items of the existing NDI and semi-structured interviews conducted with 83 patients by Hoving and colleagues [ 7].
Moreover, a questionnaire called "Side-Effects of Psychotherapy" scale (SEPS), based on items of the Inventory of Negative Effects of Psychotherapy (INEP) [ 62], a scale assessing negative effects of psychotherapy in different areas of life, as well as items constructed by the workgroup assessing negative outcomes of the intervention, will be administered post treatment and follow-up.
The scale was developed based on item response theory from a pool of items of widely used HRQoL instruments.
After removal based on item duplication, redundancy and application of inclusion criteria, 51 items remained for pilot testing (Table 1).
MFRM is based on Item Response Theory (IRT), a branch of Latent Trait Theory.
Each subscale is calibrated to yield scaled scores based on item response theory and Bayesian estimation of ability.
Recent advances in health profile measurement include the development of measures based on item response theory.
