Samenvatting

Abstract
Background: To assess the internal consistency reliability and construct validity of the Dutch version of the World
Health Organization Quality of Life Instrument-Older Adults Module (WHOQOL-OLD).
Methods: The psychometric properties of the Dutch WHOQOL-OLD were examined in a cross-sectional study using
a sample of 1,340 people aged 60 years or older. Participants completed a Web-based questionnaire, the ‘Senioren
Barometer’. Reliability was evaluated using Cronbach’s alpha and corrected item-total correlations. Construct validity
of the Dutch WHOQOL-OLD was evaluated with confirmatory factor analyses, and correlations within and between
scales, using scales WHOQOL-BREF, Short Form Health Survey (SF-12), Tilburg Frailty Indicator (TFI), and the
Emotional and Social Loneliness Scale (ESLS).