[Development of the general module of the system of quality of life instruments for cancer patients: reliability and validity analysis].
OBJECTIVE
The general module of the system of quality of life instruments for cancer patients (QLICP-GM) has been developed by us, but its psychologic properties need to be evaluated. This study was to evaluate the reliability and validity of QLICP-GM.


METHODS
The QOL data of 600 patients with lung cancer, breast cancer, colorectal cancer, gastric cancer, and head and neck cancer were analyzed by paired t-tests, correlation analysis, equivalence tests, and structural equation models to evaluate QLICP-GM.


RESULTS
The test-retest reliability for all domains and the overall scale was above 0.85. Internal consistency alpha values for all domains except social function domain were above 0.70. The alpha value and split-half reliability of the overall scale were 0.88 and 0.93, respectively. Correlation analyses and structural equation models displayed good construction validity of the scale. It also showed good criterion-related validity when FACT-G was used as the criterion.


CONCLUSIONS
QLICP-GM can be used to measure QOL for cancer patients with good reliability and validity.
Wan
Chong-Hua
CH
Faculty of Public Health, Kunming Medical College, Kunming, Yunnan, PR China. Chonghua_wan@yahoo.com.cn
Meng
Qiong
Q
Yang
Zheng
Z
Tang
Xue-Liang
XL
Zhang
Can-Zhen
CZ
Lu
Yu-Bo
YB
Luo
Jia-Hong
JH
Zhang
Xiao-Qing
XQ
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D044466:Asian People / Q000523:psychology; D002648:Child; D016001:Confidence Intervals; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009369:Neoplasms / Q000523:psychology*; D011594:Psychometrics / Q000379:methods*; D011788:Quality of Life / Q000523:psychology*; D011795:Surveys and Questionnaires; D055815:Young Adult