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Table 3 Studies examining the psychometric properties of the EPIC-26 since 2012

From: Psychometric properties of the expanded prostate cancer index composite - 26 instrument in a cohort of radical prostatectomy patients: theoretical and practical examinations

Study (reference) Psychometric findings
Korzeniowski et al. 2016 [16] Informative and useful for patient communication as judged by clinicians
Sharma et al. 2016 [17] Good feasibility both on paper and electronically
Skolarus et al. 2012 [18] Good feasibility both on paper and automatic telephone response
Sampurno et al. 2015 [19] Good feasibility both on paper and interactive voice method
Fosså et al. 2016 [20] Internal consistencies alpha 0.64–0.91 of the 5 domains
Skolarus et al. 2012 [18] Good test-retest reliability
Sampurno et al. 2015 [19] Good test-retest reliability
Ellison et al. 2013 [21] Criterion validity with the Incontinence Severity Index
Fosså et al. 2016 [20] Criterion validity with the International Prostate Symptom Score
Punnen et al. 2013 [22] Convergent validity of urinary and sexual bother scores and Generalized Anxiety Disorders Screener (GAD-7) and Distress Thermometer, and sexual bother with Patient Health Questionnaire-9 (depression)
Evans et al. 2015 [23] Convergent validity with the SF-12 (quality of life)
Watson et al. 2015 [24] Convergent validity of urine and bowel domains with health (EQ-5D-5 L), unmet needs (SCNS-SF34), anxiety/depression (HADS), and self-efficacy (Cancer Survivors Self Efficacy Scale)
Schofield et al. 2012 [25] Divergent validity with unmet needs (SCNF-SF 34)
Evans et al. 2015 [23] Predictive validity with the SF-12 (quality of life)
Recklitis et al. 2014 [26] Predictive validity of hormonal subscale score and more suicidal ideation
Evans et al. 2015 [23] Responsiveness to change (minimally important differences)
Skolarus et al. 2015 [27] Responsiveness to change (minimally important differences)
Tavlarides et al. 2015 [28] Responsiveness to change documented
Fosså et al. 2016 [20] Responsiveness to change documented