Validation of Gastrointestinal Quality of Life Index in Swedish for assessing the impact of gallstones on health-related quality of life.
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.


CONCLUSIONS
The Swedish translation of GIQLI has a high validity and reliability for assessing the impact of gallstones on quality of life.
Sandblom
Gabriel
G
Department of Surgery, University Hospital of Lund, Lund, Sweden. gabriel.sandblom@med.lu.se
Videhult
Per
P
Karlson
Britt-Marie
BM
Wollert
Staffan
S
Ljungdahl
Mikael
M
Darkahi
Bahman
B
Liljeholm
Haakan
H
Rasmussen
Ib Christian
IC
D000328:Adult; D017281:Cost of Illness; D005260:Female; D042882:Gallstones; D006801:Humans; D008297:Male; D008875:Middle Aged; D011788:Quality of Life; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires; D013548:Sweden; D055815:Young Adult