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This study represents the first validation of the DN4 questionnaire, originally validated into French, into another language.
Strengths of the study lie in its moderate sample size and the use of the well-validated AUDIT-C screening test (albeit originally validated in the format of verbal administration rather than as part of a written questionnaire).
The foot function index (FFI) is another validated, self-reported foot questionnaire that was originally validated in patients with rheumatoid arthritis (Budiman-Mak et al. 1991), but it was revised and there are now several versions in different languages.
The FQ was originally validated in primary care, and has demonstrated good face and discriminant validity and good and stable psychometric properties across populations [ 27, 28].
Notably, the adaptation of items and/or of entire questionnaires resulted in the loss of their originally validated psychometric properties.
We also note those methods often perform better in datasets in which they were originally validated, which is somewhat expected due to fine tuning procedures.
Methods are often better in the datasets they were originally evaluated: We also note those methods perform better in datasets in which they were originally validated, which is somewhat expected due to fine tuning procedures.
Similar(4)
The questionnaire, originally developed, validated and used in a similar study [ 19], was translated into Italian (see Additional file 1).
Accordingly, the HDQ demonstrated higher construct validity among Canadian participants who resembled the sample from which the HDQ was originally derived, validated and refined.
As the APACHE-II was originally not validated for cardiac surgery patients, a subgroup analysis was also performed without cardiac surgery patients.
For assessing score of quality of life attributes, the Indonesia Health Related Quality of Life Questionnaire, which was originally developed, validated and patented by one of the authors, Rivany (9), was adapted and modified for the disaster setting in Padang city.
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