Study	Reason for exclusion
Allen 2002	Randomisation less than one year
Andersen 2002	Randomisation less than one year
Chu 2004	Intervention not targeted at service level
Collen 1991	Non‐randomised controlled trial
Corr 1995	Randomisation less than one year
Drummond 1995	Randomisation less than one year
Duncan 1998	Randomisation less than one year
Eng 2003	Non‐randomised controlled trial
Frayne 2000	Patients not living at home at the time of randomisation
Gilbertson 2000	Randomisation less than one year
Jongbloed 1991	Randomisation less than one year
Lincoln 2004	Randomisation less than one year
Logan 1997	Randomisation less than one year
Logan 2003	Randomisation less than one year
Logan 2004	Randomisation less than one year
Meikle 1979	Randomisation less than one year
Page 2004	Intervention not targeted at the service level
Salbach 2004	Randomisation less than one year
Salbach 2005	Randomisation less than one year
Sandhu 1993	Patients not living at home at the time of randomisation
Smith 1981	Randomisation less than one year
Sun 2001	Intervention not targeted at the service level
van de Gaag 2005	Non‐randomised controlled trials
von Koch 2001	Randomisation less than one year
Walker 1999	Randomisation less than one year
Wall 1987	Randomisation less than one year
Weiss 2000	Non‐randomised controlled trial
Wolfe 2000	Randomisation less than one year
Woodhead 1997	Non‐randomised controlled trial
Young 1992	Randomisation less than one year