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Table 2 Internal consistency coefficients by measure

From: Serial personal digital assistant data capture of health-related quality of life: A randomized controlled trial in a prostate cancer clinic

Mode of Application

IPSS (Cronbach's alpha range)

IIEF-5 (Cronbach's alpha range)

Paper

.78 to .85

.97 to .98

PDA

.85 to .87

.97 to .98

  1. Note: This analysis was not performed on the PORPUS as this scale uses 10 independent questions to measure 10 quality of life domains and is not an appropriate scale for internal consistency analysis.