Validation and reliability of the Dutch version of the EORTC QLQ-BLM30 module for assessing the health-related quality of life of patients with muscle invasive bladder cancer

Table 4 Interclass correlation coefficient of the QLQ-BLM30 subscales for 81 MIBC patients participating in the test-retest analysis of BlaZIB

Scale	Assessment of stability	Number of stable patients^a	ICC	(95% CI)	SEM^b
Scales
US	urinary function	29	0.76	(0.55–0.88)	8.9
UP	urinary function	24	0.61	(0.29–0.81)	10.5
FW	total function	42	0.68	(0.48–0.81)	13.7
BAF	bowel function	39	0.47	(0.18–0.68)	11.0
BI	total function	40	0.80	(0.64–0.89)	8.9
SX	sexual function	36	0.69	(0.50–0.82)	12.1
SXmen	sexual function	29	0.73	(0.53–0.86)	20.8
Single items
CAT	urinary function	2	NA	NA	NA
UPi	urinary function	24	0.79	(0.56–0.90)	9.6
UPe	urinary function	25	0.57	(0.24–0.79)	10.5
UPs	urinary function	24	0.76	(0.51–0.89)	11.8
SXi	sexual function	17	0.42	(−0.03–0.73)	17.0
SXcp	sexual function	16	0.21	(−0.27–0.60)	24.2
SXen	sexual function	17	0.74	(0.42–0.90)	16.1
SXfem	sexual function	0	NA	NA	NA

BAF Abdominal bloating and flatulence, BI Body image, CAT Single catheter use problem, CI Confidence Interval, FW Future worries, ICC Intraclass Correlation Coefficient, UP Urostomy problem, UPe Urostomy embarrassment, UPi Urostomy irritation, Ups Urostomy support, US Urinary symptom, SEM Standard Error of Measure, SX Sexual functioning, SXcp Risk of contaminating partner, SXen Sexual enjoyment, SXfem Female sexual problems, SXi Sexual intimacy, SXmen Male sexual problems
^a Patients 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
^b Using the Restricted Maximum Likelihood (REML) approach

ISSN: 1477-7525