Internal consistency and convergent and divergent validity of the Liverpool jetlag questionnaire.

Internal consistency and convergent and divergent validity of the Liverpool jetlag questionnaire. Chronobiol Int. 2020 Jan 14;:1-9 Authors: Ledger S, Bin YS, Nour M, Cistulli P, Bauman A, Allman-Farinelli M, Naismith SL, Stamatakis E, Caillaud C, De Chazal P, Simpson SJ Abstract Objective measures of circadian disruption are difficult to capture in a free-living environment hence the importance of validating subjective measures of jetlag. We aimed to assess the internal consistency of the 15-item Liverpool Jetlag Scale and its convergent and divergent validity with indicators of fatigue and anxiety in a large sample of air passengers. Online survey of passengers was conducted after travel on a range of long-haul flights. Jetlag was captured using the Liverpool scale, fatigue was measured using the Vitality subscale of the Short-Form Health Survey (SF-36), and the presence of anxiety or worry before, during, and after flight was self-reported. Inter-item correlations and Cronbach's alpha were calculated to assess the internal consistency of the scale. Exploratory factor analysis was used to examine whether the scale was consistent with one underlying construct of circadian disruption. Correlations between fatigue and anxiety (flying, situational, symptoms) with jetlag were used to assess convergent and divergent validity. Linear regression was used to determine the most important symptoms contributing to subjective jetlag rating. N = ...
Source: Chronobiology International - Category: Biology Authors: Tags: Chronobiol Int Source Type: research