TABLE 1

						Exposed and nonexposed individuals			Exposure ascertained by
Reference	Independent validation of cases	Appropriately selected cases must meet all 4 criteria^a	Controls from same population as cases	Explicit statement controls have no history of outcome	Matched	Matched by second factor	Adjusted by 1 factor when no matching	Adjusted by >1 factor when no matching	Secure record (chart/file)	Structured interview^b	Same method of ascertaining cases and controls	Response rates same for cases and controls
Brown et al,³²1997		Yes									Yes
Cachelin et al,³⁴ 2005		Yes	Yes							Yes	Yes
Cheasty et al,⁷ 1998		Yes	Yes								Yes
De Bellis et al,³⁷1994					Yes	Yes			Yes
Deep et al,³⁸1999			Yes	Yes	Yes	Yes				Yes
Figueroa et all,⁴⁴ 1997										Yes	Yes
Garnefski et al,⁴⁷1992		Yes	Yes	Yes	Yes	Yes					Yes
Pettigrew & Burcham,⁵¹ 1997			Yes	Yes					Yes
Price et al,⁵³ 2002		Yes	Yes		Yes				Yes	Yes
Roelofs et al,⁵⁵ 2002		Yes			Yes	Yes				Yes	Yes	Yes
Spitzer et al,⁵⁷ 2008		Yes	Yes	Yes	Yes	Yes					Yes
Steiger et al,⁵⁸ 2000				Yes							Yes
Striegel-Moore et al,⁵⁹ 2002		Yes	Yes	Yes	Yes	Yes					Yes
Stuart et al,⁶⁰1990				Yes	Yes	Yes					Yes
Tanskanen et al,⁶¹ 2004		Yes	Yes	Yes	Yes	Yes					Yes
Welch & Fairburn,⁶² 1996		Yes	Yes	Yes	Yes	Yes					Yes
Wise et al,⁶⁴2001	Yes	Yes	Yes								Yes