External validation of the Moroccan Arabic version of the European Organization for Research and Treatment of Cancer colorectal (CR29) module: Monocentric study

Table 3 Convergent and discriminant validity of the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire-CR29

QLQ-CR29 scales	Total sample (n = 221)			Patients without stoma (n = 50)			Patients with stoma (n = 171)
	Convergent	Discriminant	α	Convergent	Discriminant	α	Convergent	Discriminant	α
Urinary frequency	0.905-0.907	-0.00-0.25	0.795	0.83-0.84	-0.00-0.21	0.66	0.91-0.92	-0.12-0.25	0.82
Blood or mucus in stool	0.74-0.89	-0.27-0.35	0.615	0.62-0.96	-0.44-0.35	0.581	0.79-0.87	-0.20-0.30	0.65
Body image	-0.66-0.75	-0.00-0.36	0.672	-0.51-0.89	-0.20-0.39	0.690	-0.63-0.72	-0.07-0.19	0.64
Stool frequency	0.83-0.96	-0.30-0.39	0.8351	0.83-0.96	-0.31-0.39	0.804	-0.85-0.91	-0.14-0.34	0.87

¹Mean of cronbach’s alpha coefficient for patients without and with stoma.

Multitrait scaling analysis’ summary of the results; ranges for convergent and discriminant validity of each multiitem scale and their internal consistency using cronbach’s alpha. QLQ: Quality of Life Questionnaire.