Systematic Reviews
Copyright ©The Author(s) 2015.
World J Gastroenterol. Mar 28, 2015; 21(12): 3679-3693
Published online Mar 28, 2015. doi: 10.3748/wjg.v21.i12.3679
Table 7 Descriptive characteristics of studies on the association between cholecystectomy and liver cancer
Ref.Period of studyStudy designNo. of casesNo. of controlsExposure ascertainmentOutcome ascertainmentFollow-up (yr)Effect estimateAdjustmentsQuality of publication
Nogueira et al[21], 20141992-2005Case-control332/102192572/100000Medicare databaseCancer registry> 6OR = 1.23 (1.15-1.33)Age, gender, diabetes49
Chow et al[34], 19991977-1993Cohort48/42461NANational registryCancer registry≥ 41.1 (0.7-1.5)Age, gender, obesity, years of follow-up, other comorbidities33
Goldacre et al[22], 20051963-1999Cohort38/39245306/334813NHS databaseCancer registryNA0.91 (0.64-1.25)Age, gender, calendar year, residence36
Chen et al[29], 20142000-2010Cohort87/5850163/5850National databaseCancer registry101.17 (0.90-1.52)Age, gender, comorbidities53