Study	Reason for exclusion
Anderson 1996	Not randomised or controlled
Avia 1996	Not randomised
Bouman 1998	No control group included
Bouman 2002	Not randomised or controlled
Brown 1936	Case series
Buwalda 2006	No Control group included
Fried 1978	Not randomised or controlled; no diagnosis of hypochondriasis made
Hassan 1989	Not randomised or controlled
Jones 2002	Health anxiety identified by GP, but no diagnosis of hypochondriasis made
Kellner 1971	Only half the participants had hypochondriasis; not controlled
Kellner 1982	Not randomised or controlled
Kellner 1983	Not randomised or controlled
Kenyon 1964	Not randomised or controlled
Langlois 2004	Not randomised or controlled
Martinez 2005	Not randomised or controlled
Papageorgiou 1998	Not randomised
Rhinard 1967	Case report
Salkovskis 1986	Case series
Salkovskis 2001	Not completed
Schmieschek 1968	Not randomised or controlled
Stern 1991	Not randomised or controlled
Townend 1994	Case series
Tyrer 1999	Hypochondriacal personality disorder present in some but no diagnosis of hypochondriasis made. Treatments given for generalised anxiety disorder, panic and dysthymia (rather than hypochondriasis)
Visser 1992	Not randomised or controlled
Warwick 1988	Not randomised or controlled
Wattar 2005	Not randomised or controlled