Value in health : the journal of the International Society for Pharmacoeconomics and Outcomes Research · 2009
Validation of Gastrointestinal Quality of Life Index in Swedish for assessing the impact of gallstones on health-related quality of life.
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Sandblom Gabriel, Videhult Per, Karlson Britt-Marie, Wollert Staffan, Ljungdahl Mikael, Darkahi Bahman, Liljeholm Haakan, Rasmussen Ib Christian
Аннотация
OBJECTIVE: The aim of the present study was to validate a Swedish translation of the Gastrointestinal Quality of Life Index (GIQLI) questionnaire in patients with gallstone disease.
METHODS: Sensitivity to change, internal consistency, and test-retest stability were tested in 187 consecutive patients who underwent planned cholecystectomy. Construct validity was assessed by comparing the GIQLI score with the bodily pain scale of SF-36 and four single-item questions in a separate group of 104 patients.
RESULTS: A significant increase in all five domains as well as in the overall GIQLI score 6 months after surgery (all P < 0.05) was seen. All five domains correlated significantly with other measures of gallstone-related symptoms except one single-item question. Intraclass correlations ranged from 0.62 to 0.87. Cronbach's alpha ranged from 0.77 to 0.89.
CONCLUSION: The Swedish translation of GIQLI has a high validity and reliability for assessing the impact of gallstones on quality of life.
METHODS: Sensitivity to change, internal consistency, and test-retest stability were tested in 187 consecutive patients who underwent planned cholecystectomy. Construct validity was assessed by comparing the GIQLI score with the bodily pain scale of SF-36 and four single-item questions in a separate group of 104 patients.
RESULTS: A significant increase in all five domains as well as in the overall GIQLI score 6 months after surgery (all P < 0.05) was seen. All five domains correlated significantly with other measures of gallstone-related symptoms except one single-item question. Intraclass correlations ranged from 0.62 to 0.87. Cronbach's alpha ranged from 0.77 to 0.89.
CONCLUSION: The Swedish translation of GIQLI has a high validity and reliability for assessing the impact of gallstones on quality of life.