Assessment of a patient-reported outcome measure in men with prostate cancer who had radical surgery: a Rasch analysis.

ABSTRACT:

Objectives

To evaluate the psychometric properties (and identify specific anomalies to be resolved) of urinary and sexual function scales of the Symptom Tracking and Reporting (STAR) instrument for use in clinical practice with individual men using Rasch analysis.

Design

Prospective cohort study.

Setting

9 UK surgery centres in secondary care.

Participants

403 men diagnosed with prostate cancer and completed at least one questionnaire immediately before and at 1 or 3 months after radical prostatectomy.

Primary and secondary outcomes

STAR instrument before surgery and 1 and 3 months afterwards.

Results

Neither scale fitted the Rasch model (both scales p<0.001). Both urinary (seven items) and sexual function (six items) had disordered thresholds, su

SUBMITTER: Protopapa E 

PROVIDER: S-EPMC7668365 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature