Assessing Items on the SF-8 Japanese Version for Health-Related Quality of Life: A Psychometric Analysis Based on the Nominal Categories Model of Item Response Theory

Abstract

The SF-8 instrument performs well among those with poor QOL across the continuum of the latent trait and thus can recognize more effectively persons with relatively poorer QOL than those with relatively better QOL.

Mental illness and a high‐risk, elderly Japanese population: characteristic differences related to gender and residential location

“…NPD level was dichotomized based on recommended cut-off points; low (0-4) or high (5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24), which maximize the sum of sensitivity and specificity. 20,23 Other independent variables were categorized as follows: age (65-69 years or 70-74 years); years of education (<13 years or ≥13 years (attended or completed university)), working hours (not working (0 hours), part-time work (1-34 hours), or full-time work (≥35 hours)), and physical limitation (No (not at all) or Yes (very little, somewhat, quite a lot, and could not do daily work)).…”

Gender Disparities in Quality of Life and Psychological Disturbance in Patients With Implantable Cardioverter-Defibrillators

“…Both summary scores are reported on a scale from 0 to 100, with higher scores indicating better physical and mental health. 19, 20 The BDI is the most frequently used self-report method of depression screening in general populations, and it also pro- 3. I am afraid of being alone if the ICD fires and I need help.…”

Sociodemographic, biological, psychological, and behavioral correlates of cycling in community-dwelling Japanese older adults: A cross-sectional study

“…The existence of physical barriers was evaluated based on one questionnaire item that assessed physical functioning: "During the past 4 weeks, how much did physical health problems limit your usual physical activities (such as walking or climbing stairs)?" 25) ; participants who answered "Could not do physical activities" were excluded. The final number of participants included in our analysis was 1,938.…”

“…This scale was translated into Japanese and has shown good reliability and validity 27,29) . Self-rated health was measured with an item from the Short Form-8 (SF-8) 25) , which is an instrument commonly used to assess health-related quality of life (QOL): "Overall, how would you rate your health during the past 4 weeks?" The answers were categorized into "good" (options: excellent, very good, and good) and "bad" (options: fair, poor, and very poor).…”