C) The third phase of de-duplication identified item content overlap between the SF-36 items and other items in the pool.
According to Streiner [ 39], the Cronbach's alpha values that are higher than 0.90 may reflect unnecessary duplication of items which will result in a needlessly long questionnaire.
The main barriers were duplication of items within existing checklists (16/18 centres), poor communication between surgeon and anaesthetist (10/18), time spent completing the checklist for no perceived benefit, and lack of understanding and timing of item checks (9/18), ambiguity (8/18), unaccounted risks (7/18) and a time-honoured hierarchy (6/18).
eTG ≥ 200 or TCH ≥ 240 or LDL ≥ 160 or HDL < 40 fPFG > 110 gUA > 420 for male, UA > 360 for female FI = x/34 While there may appear to be duplication of items in Table 1, such as dementia and memory loss, deafness and hearing loss etc., they represent deficits from different perspectives, since diagnosis of chronic diseases by doctors may differ from the list of geriatric syndromes.
Additionally, items were flagged for deletion when the inter-item correlation was > 0.70, indicating duplication within the item pool; or the item-total correlation was < 0.20, indicating the question was measuring a concept different from the other questions in the item pool.
Items contained in overlapping rearrangements were considered once, avoiding duplications of items or sizes.
Four items were removed on the basis of duplication and low item-domain correlations, including the two extra clinical items.
After removal based on item duplication, redundancy and application of inclusion criteria, 51 items remained for pilot testing (Table 1).
After excluding item duplication, we calculated correlation coefficients between each item and the subscale that it belonged to.
We hypothesized that the duplication of some items on the WOMAC's pain and function subscales contributed to this shortcoming.
Our hypothesis was that the duplication of some items on the WOMAC's pain and function subscales contributes to this shortcoming.
