The median floor effect was 92.0% (87.0-97.0%) for the PF items, 60.0% (47.0-72.0%) for the HRQoL PhH items, and 66.0% (66.0-72.0%) for the HRQoL PsH items. The median ceiling effect was 0.0% (0.0-1.0%) for the PF items, 4.0% (3.0-7.0%) for the HRQoL PhH items, and 0.0% (0.0-0.0%) for the HRQoL PsH items. The median floor effect was 47.0% for the pain VAS, 39.0% for the disease activity VAS and 48.0% for the well-being VAS. The median ceiling effect was 1.0% for the pain VAS, 3.0% for the disease activity VAS and 0% for the well-being VAS. Equal items-scale correlations (second Likert assumption) Pearson items-scale correlations corrected for overlap were roughly equivalent for items within a scale for 86.7% of the PF items, with the exception of PF items 5 and 15, and for 90% of the HRQoL items, with the exception of HRQoL item 1. Items internal consistency (third Likert assumption) Pearson items-scale correlations were 0.4 for 86.7% of items of the PF (except for PF items 5 ≥ and 15) and 100% of items of the HRQoL. Cronbach’s alpha internal consistency Cronbach’s alpha was 0.82 for PF-LL, 0.74 for PF-HW, 0.64 for PF-US. Cronbach’s alpha was 0.86 for HRQoL-PhH and 0.85 for HRQoL-PsH. Interscale correlation The Pearson correlation of each item of the PF and the with all items included in the remaining scales of the questionnaires was lower than the Cronbach’s alpha, with the exception of the PF item 3.
The median floor effect was 92.0% (87.0-97.0%) for the PF items, 60.0% (47.0-72.0%) for the HRQoL PhH items, and 66.0% (66.0-72.0%) for the HRQoL PsH items. The median ceiling effect was 0.0% (0.0-1.0%) for the PF items, 4.0% (3.0-7.0%) for the HRQoL PhH items, and 0.0% (0.0-0.0%) for the HRQoL PsH items. The median floor effect was 47.0% for the pain VAS, 39.0% for the disease activity VAS and 48.0% for the well-being VAS. The median ceiling effect was 1.0% for the pain VAS, 3.0% for the disease activity VAS and 0% for the well-being VAS. Equal items-scale correlations (second Likert assumption) Pearson items-scale correlations corrected for overlap were roughly equivalent for items within a scale for 86.7% of the PF items, with the exception of PF items 5 and 15, and for 90% of the HRQoL items, with the exception of HRQoL item 1. Items internal consistency (third Likert assumption) Pearson items-scale correlations were ≥ 0.4 for 86.7% of items of the PF (except for PF items 5 and 15) and 100% of items of the HRQoL. Cronbach’s alpha internal consistency Cronbach’s alpha was 0.82 for PF-LL, 0.74 for PF-HW, 0.64 for PF-US. Cronbach’s alpha was 0.86 for HRQoL-PhH and 0.85 for HRQoL-PsH. Interscale correlation The Pearson correlation of each item of the PF and the with all items included in the remaining scales of the questionnaires was lower than the Cronbach’s alpha, with the exception of the PF item 3.
JAMAR_SLOVENIA_v.7_tbs.docx