Development and Psychometric Analysis of the Japanese Version of the Nottingham Health Profile: Cross-cultural Adaptation

Abstract

Objective To adapt the Nottingham Health Profile (NHP) for Japanese and to describe the results of the assessment of its psychometric properties.Methods Assessments included test-retest reliability over approximately a 2-week interval, internal consistency and construct validity in 133 patients with COPD.Results The distribution of scores indicated that most of the NHP sections exhibited a floor effect, although this is greatly reduced with the NHP-Distress scale. The testretest reliability was above 0.8 for all sections when patients reporting any change in their health status rating were excluded. Cronbach's alpha coefficients reflected the number of items contained in each section. The internal consistency of the emotional reactions section at one timepoint and the physical mobility section at both timepoints were lower than expected to be higher. All sections except the pain section could be used to distinguish patients who reported their health status to be good or fair from those who rated it to be poor or very poor.Conclusion The adaptation of the NHP for Japanese was successful. Most sections showed reasonable testretest reliability, indicating that they produced acceptable levels of random measurement error. The internal consistency of the sections was confirmed, although the alpha values of the emotional reactions and physical mobility sections were lower than might be expected for scales of their length. Different sections of the Japanese NHP were shown to have known group validity.

Cross-diagnostic validity of the Nottingham health profile index of distress (NHPD)

“…In accordance with expectations and previous observations [ 4 , 10 , 12 ] we found the NHPD to display considerably less floor effects than the original NHP dimension scores typically have and that the observed proportion met the suggested 15% criterion [ 42 ]. This is an important observation because large floor and ceiling effects impact the possibility to differentiate between respondents and detect changes over time [ 43 ].…”

“…The NHP index of Distress (NHPD) is a 24-item measure of illness-related distress embedded in the NHP [ 9 ]. While it has not been extensively used or evaluated, available data have shown promise and suggest that it can provide a unidimensional measure of illness-related distress [ 4 , 10 - 12 ]. Indeed, the NHPD has the potential, at least in part, to overcome limitations associated with NHP domain scores.…”

“…The larger number of items should improve reliability and precision of scores. Accordingly, available studies have shown less floor/ceiling effects and indicated better responsiveness and reliability of the NHPD than the six NHP domain scores [ 4 , 9 - 12 ]. However, its generic properties, i.e.…”

Migration status and self-reported health among high school students in Stockholm: A cross-sectional study

“…A high number of scores of 0 emerged giving medians of "0" (Congleton, Hodson, & Duncan-Skingle, 1998;Ecochard et al, 2001;Lamarca, Alonso, Santed, & Prieto, 2001). For this reason, the scores were categorized as good or fair (below mean score) and poor or very poor (above mean score) (Nishimura et al, 2004). Kruskal-Wallis and Mann-Whitney tests were used for ordinal variables and where there was deviation from normality.…”