Structural consistency of the Pain Sensitivity Questionnaire in the Cooperative Health Research In South Tyrol (CHRIS) population-based study.
J Pain. 2018 Jul 06;:
Authors: Melotti R, Ruscheweyh R, Pramstaller PP, Hicks AA, Pattaro C
The self-reported Pain Sensitivity Questionnaire (PSQ) is a valid supplement to experimental pain testing. However, the latent constructs determining the originally proposed one general score (PSQ-total) and two sub-scores (PSQ-moderate, PSQ-minor) have not been consistently investigated in population-based studies or between genders. Based on a single construct hypothesized by expert knowledge or alternative constructs upon empirical evidence, PSQ structures were explored and confirmed among 4820 participants aged 18-93 years of the CHRIS study. By exploratory factor analysis, we identified 3 alternative sets of PSQ imagined painful situations comprising 14, 10 and 9 items respectively, which displayed simple structures of the rotated factor loadings of direct interpretation. In confirmatory analysis (CFA) of one latent factor, the 10-item set yielded acceptable goodness-of-fit overall, better fit than the alternative sets and consistent structural properties between genders. Separate analyses based on 14- and 9-item sets returned considerable correlations among two latent constructs. In higher-order CFA with each set, one first-order general factor explained large part of the variances of two second-order factors. One dominant construct consistently describes the factorial structure of the PSQ. Averaging across the 10-item set, the PSQ-short score represents a structurally robust, gender-consistent and practical measure of general pain sensitivity.
PERSPECTIVE: One dominant latent construct of general pain sensitivity consistently determines responses to the self-reported PSQ. The PSQ-short score maintains similar psychometric properties to the PSQ-total and between genders. This measure is attractive for large-scale research and clinical screening of pain sensitivity.
PMID: 30017960 [PubMed – as supplied by publisher]