Arquivos de neuro-psiquiatria
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Multicenter Study
Psychometric properties of the Brazilian version of the Pain Catastrophizing Scale for acute low back pain.
Measurement instruments of pain catastrophizing for middle-aged and elderly individuals are needed to understand its impact on low back pain. The goals were to cross-culturally adapt the Pain Catastrophizing Scale, assess the construct validity through Rasch analysis, and verify reliability and convergent validity of pain catastrophizing with psychosocial factors. 131 individuals aged 55 years and older with acute low back pain were interviewed. The intra-rater reliability was Kp = 0.80 and interrater Kp = 0.75. ⋯ The pain catastrophizing correlated with most psychosocial factors. The instrument proved to be clinically useful. Subsequent studies should carry out the same analysis in different populations.