Roberto Meroni1, Daniele Piscitelli1, Francesca Bonetti2, Mattia Zambaldi3, Cesare G Cerri1, Andrew A Guccione4, Paolo Pillastrini5. 1. Department of Translational Medicine and Surgery, PhD Program in Neuroscience, University of Milan Bicocca, Carate Brianza, Italy. 2. Studio Fisio Bonetti, Roma, Italy. 3. Centro di Fisioterapia e Medicina dello Sport Kinesi, Trento, Italy. 4. Department of Rehabilitation Science, College of Health and Human Services, George Mason University, Fairfax, VA, USA. 5. Department of Biomedical and Neuromotor Sciences, University of Bologna, PT, Italy.
Abstract
OBJECTIVE: The aim of this study was to investigate the psychometric properties of the Italian version of the Pain Catastrophizing Scale (PCS-I) in patients with chronic low back pain. METHODS: In a cross sectional study a total of 150 subjects with chronic low back pain were included. The Italian translation of the PCS was administered to all subjects. The properties of the Italian version of the PCS were explored by a Rasch analysis. RESULTS: The PCS-I, by means of few modifications, fitted the Rasch model and passed the independent t-test for a unidimensional scale. The response categories for item 2 ``I fell I can't go on'' needed to be collapsed from 4 to 3 levels. Only the item 7 ``I keep thinking to of other painful events'' showed fit residual that exceeded the chosen thresholds of ± 2.5. No Differential functioning (DIF) was observed for age, sex, marital status, BMI and smoking. CONCLUSION: The Italian version of PCS, with the purposed modifications, seems to reflect a unidimensional construct of Pain Catastrophizing. The scale seemed to be quite robust across age, sex, marital status, BMI and smoking. Targeting of the scale was moderate. A raw score to metric conversion was proposed.
OBJECTIVE: The aim of this study was to investigate the psychometric properties of the Italian version of the Pain Catastrophizing Scale (PCS-I) in patients with chronic low back pain. METHODS: In a cross sectional study a total of 150 subjects with chronic low back pain were included. The Italian translation of the PCS was administered to all subjects. The properties of the Italian version of the PCS were explored by a Rasch analysis. RESULTS: The PCS-I, by means of few modifications, fitted the Rasch model and passed the independent t-test for a unidimensional scale. The response categories for item 2 ``I fell I can't go on'' needed to be collapsed from 4 to 3 levels. Only the item 7 ``I keep thinking to of other painful events'' showed fit residual that exceeded the chosen thresholds of ± 2.5. No Differential functioning (DIF) was observed for age, sex, marital status, BMI and smoking. CONCLUSION: The Italian version of PCS, with the purposed modifications, seems to reflect a unidimensional construct of Pain Catastrophizing. The scale seemed to be quite robust across age, sex, marital status, BMI and smoking. Targeting of the scale was moderate. A raw score to metric conversion was proposed.
Authors: Diego Gaddi; Angelo Mosca; Massimiliano Piatti; Daniele Munegato; Marcello Catalano; Giorgia Di Lorenzo; Marco Turati; Nicolò Zanchi; Daniele Piscitelli; Kevin Chui; Giovanni Zatti; Marco Bigoni Journal: Front Med (Lausanne) Date: 2022-07-07