Purpose: To culturally adapt into Spanish and validate the outcome "Pain: Adverse psychological response" (code 1306) in patients with chronic pain.
Methods: A three-stage study was conducted: (a) translation and cultural adaptation, (b) content validation, and (c) clinical validation.
Findings: The Spanish version of the outcome "Pain: Adverse psychological response" has high content validity ( 0.91). Fourteen indicators were organized into two factors. This version offers good reliability in both inter-observer agreement (kappa = 0.72) and internal consistency (alpha = 0.89).
Conclusions: The Spanish adaptation of "Pain: Adverse psychological response" is a reliable and valid instrument for the measurement of emotional aspects of chronic pain.
Implications for nursing practice: The Spanish adaptation of this outcome offers nurses a set of structured indicators to measure the adverse emotional impact of chronic pain.
Keywords: Chronic pain; Nursing Outcomes Classification; emotional response; psychometric validation.
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