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Factor structure and psychometric properties of the trier inventory for chronic stress (TICS) in a representative german sample

DOI: 10.1186/1471-2288-12-42

Keywords: Chronic stress, Representative survey, Factor analysis, Measurement invariance

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Abstract:

The TICS was answered by N = 2,339 healthy participants aged 14 to 99. The sample was selected by random-route sampling. Exploratory factor analyses with Oblimin-rotated Principal Axis extraction were calculated. Confirmatory factor analyses applying Robust Maximum Likelihood estimations (MLM) tested model fit and configural invariance as well as the measurement invariance for gender and age. Reliability estimations and effect sizes are reported.In the exploratory factor analyses, both a two-factor and a nine-factor model emerged. Confirmatory factor analyses resulted in acceptable model fit (RMSEA), with model comparison fit statistics corroborating the superiority of the nine-factor model. Most factors were moderately to highly intercorrelated. Reliabilities were good to very good. Measurement invariance tests gave evidence for differential effects of gender and age on the factor structure. Furthermore, women and younger individuals, especially those aged 35 to 44, tended to report more chronic stress than men and older individuals.The proposed nine-factor structure could be factorially validated, results in good scale reliability, and heuristically can be grouped by two higher-order factors: "High Demands" and "Lack of Satisfaction". Age and gender represent differentiable and meaningful contributors to the perception of chronic stress.Stress research indicates that chronic stress increases the risk of acute illness and impaired physical health [1,2]. Chronic stress has an influence on sleeping disorders [3], acute coronary syndrome [4], and chronic pain [5]. It follows that the conceptualization and the operationalization via instruments investigating chronic stress are of relevance to the psychology of health [6].The concept of chronic stress is based on how frequently the stressors appear [7]. Chronic stress is defined as the repeated occurrence of different stressors with uncontrollable consequences or the absence of adaptive coping mechanisms [8,9]. In addit

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