The validation of the standard Chinese version of the European Organization for Research and Treatment of Cancer Quality of Life Core Questionnaire 30 (EORTC QLQ-C30) in pre-operative patients with brain tumor in China

Table 1 Descriptive statistics and scale reliability of the QLQ-C30

	Items*	Mean	Median	Mode	SD	Cronbach's alpha coefficient$
Functioning scales^
PF	1-5	81.0	86.7	100.0	23.23	0.88
RF	6, 7	79.4	100.0	100.0	28.30	0.91
EF	21-24	78.0	83.3	100.0	18.40	0.80
CF	20, 25	76.2	83.3	100.0	20.95	0.33
SF	26, 27	70.7	66.7	100.0	27.74	0.80
QL	29, 30	54.7	58.3	67.0	26.55	0.85
Symptom scales and/or items§
FA	10, 12, 18	31.2	33.3	33.0	23.71	0.81
NV	14, 15	11.3	0.0	0.0	20.91	0.84
PA	9, 19	26.5	16.7	0.0	26.33	0.75
DY	8	10.8	0.0	0.0	19.72
SL	11	18.5	0.0	0.0	28.60
AP	13	19.9	0.0	0.0	28.09
CO	16	14.5	0.0	0.0	24.19
DI	17	2.8	0.0	0.0	10.03
FI	28	47.1	33.3	33.0	36.33

* Numbers correspond to the item numbers in the questionnaire.
$ Alpha values >.70 indicate adequate scale reliability.
^ Scores range from 0 to 100, with a higher score representing a higher level of functioning.
§Scores range from 0 to 100, with a higher score representing a greater degree of symptoms.
Abbreviations: AP Appetite loss, CF Cognitive functioning; CO Constipation; DI Diarrhoea; DY Dyspnoea; EF Emotional functioning; FA Fatigue; FI Financial difficulties; NV Nausea and vomiting; PA Pain; PF physical function; QL Global health status; RF role function; SF Social functioning; SD standard deviation; SL Insomnia

ISSN: 1471-2288