Reliability of 95% confidence interval revealed by expected quality-of-life scores: an example of nasopharyngeal carcinoma patients after radiotherapy using EORTC QLQ-C 30

Table 2 Comparisons of test reliability between observed and expected scores by numbers of person.

Response Types	Numbers of Person	Test Reliability	95% Confidence Interval
			Lower Bound	Upper Bound
Observed scores	115	0.909	0.883	0.931
	230	0.909	0.891	0.925
	345	0.909	0.894	0.922
Expected scores	115	0.920	0.898	0.94
	230	0.920	0.905	0.934
	345	0.920	0.908	0.932

ISSN: 1477-7525