Preliminary validity testing using the EQ5D items provided support for the PIPP Impact subscales.
Non-WinFS file formats can be stored in WinFS stores, using the File Item, provided by WinFS.
For CTT-based methods (SM and TTD), simple imputation of missing items was performed by using the mean of the answered items, provided at least half of the items were answered by the patient, in accordance with the recommendation of the EORTC HRQoL questionnaires (personal mean score) to estimate the score.
Walmart, like other online retailers, has to classify items using the data provided by the manufacturer, reseller, or marketplace provider, to determine what the item is, how it should be categorized within Walmart's own product database, how it should be tagged, and more.
Health literacy was assessed using the three 'best performing' items provided by Chew et al. [ 12, 13], which have been widely used in surveys [ 40, 41].
Missing values were imputed using the mean values of the remaining items, provided that a sufficient proportion of remaining items were available, as specified by the scoring guidelines for each measure.
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A modified Sleep Problems Index (SPI), using all six sleep items, provided a measure of overall sleep quality.
