Case-Control Studies

Author, YearDid the Study Attempt to Enroll all or Random Sample of Cases Using Predefined Criteria?Were the Controls Derived From the Same Population as the Cases? Would They Have Been Selected as Cases if the Outcome was Present?Were the Groups Comparable at Baseline on key Prognostic Factors (e.g., by Restriction or Matching)?Did the Study Report the Proportion of Cases and Controls who met Inclusion Criteria That Were Analyzed?Did the Study use Accurate Methods for Identifying Outcomes?Did the Study use Accurate Methods for Ascertaining Exposures and Potential Confounders?Did the Study Perform Appropriate Statistical Analyses on Potential Confounders?Were Outcomes Prespecified and Defined, and Ascertained Using Accurate Methods?Quality Rating
Andersohn, 2006132YesYes; YesYesNoYesYesYesYesFair
Fischer, 2005133YesYes; YesNoNoYesYesYesYesFair
Garcia-Rodriguez, 2004134YesYes; UnclearYesYesYesYesYesYesFair
Garcia-Rodriguez, 2000237YesYes; YesNoNoYesYesYesYesFair
Garcia-Rodriguez, 200198YesYes; YesYesNoYesNoUnclearYesFair
Garcia-Rodriguez, 2007102YesYes; YesYesYesYesYesYesYesGood
Graham, 2005135YesYes; YesYesNoYesYesYesYesFair
Helin-Salmivaara, 2006129YesYes; YesNoNoYesYesYesYesFair
Hippisley-Cox, 2005136YesYes; YesYesNoYesYesYesYesFair
Johnsen, 2005137YesYes; YesYesNoYesYesYesYesFair
Kimmel, 2005138YesYes; YesNoNoYesYesYesYesFair
Lanas, 2006104YesYes; YesNoYesYesYesYesYesGood
Laporte, 2004105YesYes; YesYesUnclearUnclearYesYesYesFair
Levesque, 2005139YesYes; YesYesYesYesYesYesYesGood
Mamdani, 2002140YesNo; NoYesUnclearNoYesUnclearYesFair
Mann, 2004109NoN/AYesUnclearNoNoUnclearYesFair
Mellemkjar, 2002107YesUnclearYesUnclearYesUnclearUnclearYesFair
Patel, 2004259YesYes; YesYesNoYesYesYesYesFair
Rahme&Nedjar, 2007108YesNo; NoYesUnclearNoUnclearUnclearYesFair
Rahme, 2002141YesYes; YesYesYesYesYesYesYesFair
Ray, 2007297YesNo; NoYesUnclearNoYesUnclearYesFair
Schlienger, 2002143YesYes; YesYesNoYesYesNoYesFair
Solomon, 2002144YesYes; YesYesNoYesYesYesYesFair
Solomon, 2004a145YesYes; YesUnclearNoYesYesYesYesFair

From: Appendix G, Quality Assessment of Trials, Systematic Reviews, and Observational Studies*

Cover of Analgesics for Osteoarthritis
Analgesics for Osteoarthritis: An Update of the 2006 Comparative Effectiveness Review [Internet].
Comparative Effectiveness Reviews, No. 38.
Chou R, McDonagh MS, Nakamoto E, et al.
Copyright Notice

NCBI Bookshelf. A service of the National Library of Medicine, National Institutes of Health.