Validation and reliability of the Dutch version of the EORTC QLQ-NMIBC24 Questionnaire Module for patients with non-muscle-invasive bladder cancer

Journal of Patient-Reported Outcomes

Table 5 Intraclass correlation coefficient of the QLQ-NMIBC24 subscales for 134 NMIBC patients participating in the test–retest analysis of BlaZIB

Scale	Assessment of stability	Number of stable patients^b	ICC	(95% CI)	SEM^a
Urinary symptoms	Urinary function	80	0.70	(0.57–0.80)	10.0
Malaise	Total function	78	0.07	(− 0.15 to 0.29)	12.9
Future worries	Total function	60	0.78	(0.66–0.86)	8.4
Bloating and flatulence	Bowel function	56	0.65	(0.46–0.78)	12.4
Sexual functioning	Sexual function	58	0.82	(0.72–0.89)	8.9
Male sexual problems	Sexual function	49	0.74	(0.57–0.84)	18.3
Intravesical treatment issues	Total function	76	0.38	(0.17–0.56)	11.8
Sexual intimacy	Sexual function	22	0.73	(0.46–0.88)	11.4
Risk of contaminating partner	Sexual function	20	0.40	(− 0.04 to 0.71)	15.2
Sexual enjoyment	Sexual function	20	0.71	(0.40–0.87)	14.9
Female sexual problems	Sexual function	0

ICC, intraclass correlation coefficient, CI confidence interval, SEM standard error of measure
^aUsing the Restricted Maximum Likelihood (REML) approach
^bPatients who (self-reported) remained the same with respect to the specific assessment of stability (i.e. urinary, bowel, sexual or total function) between the T12mo and T12mo + 2wk questionnaire