Author and date	Ref ID	Description of groups	Reason for exclusion
		'Historically controlled studies'
Barton 1990	1647	1983‐4 baseline rates 1984 postcard reminders 1985 postcard reminders + feedback to service chiefs 1986 postcard reminders + feedback to service chiefs + feedback to physicians	Excluded as cannot assess secular trends for increase in rest of population
Chodroff 1990		1986 historical baseline 1986‐1990 residents given preventive checklists	Excluded as cannot assess secular trends for increase in rest of population
Davidson 1984	1772	Intervention for nurse reminder: 50% of eligibles in 2 consecutive years Control: rest of eligible participants (called historical controls but are same years)	Excluded as cannot assess secular trends for increase in rest of population
De Wals 1988	1677	1984 baseline 1985 information campaign by family physicians 1986 same + collective info campaign	Excluded as cannot assess secular trends for increase in rest of population
Donato 2007	2016	2002 nurses screened participants' reminders 2003 standing orders 2004 education campaign	Excluded as cannot assess secular trends for increase in rest of population
Gill 2000	1114,1251, 1311	1997 baseline rates 1998 reminder to nurse and physician during visit	Excluded as cannot assess secular trends for increase in rest of population
Harris 1990	1633	Retrospective analysis 1979‐80 baseline 1981 nurse prompt 1984 computer prompt	Excluded as cannot assess secular trends for increase in rest of population
Humair 2002	2607	1995 baseline 1996 intervention	Excluded as cannot assess secular trends for increase in rest of population
Hutchinson 1991		1982‐3 historical baseline 1987‐88 reminder placed on all charts	Excluded as cannot assess secular trends for increase in rest of population
Knoell 1991	1619	1987‐8 baseline 1989 intervention	Excluded as cannot assess secular trends for increase in rest of population
Malmvall 2007	293	1999‐2001 baseline date (rates were increasing) 2002‐2005 same intervention in each of 4 years Appears initially to be a time series but is a series of same repeated interventions)	Excluded as cannot assess secular trends for increase in rest of population
		2 GEOGRAPHICAL AREAS (“Non‐randomized controlled trials”)
Etkind 1996	1405	2 Massachusetts counties One reimbursement for vaccination + education campaigns One usual care	Excluded, non‐comparable control
Harris 2006	34	S Adelaide; intervention N and W Adelaide; control	Excluded, non‐comparable control
Honkanen 1997 (same data bases as Honkanen 2006)		Admin Area A: risk of disease‐based influenza vaccination programme Admin Area B: age‐based vaccination programme offered Autumn 1993 and 1994 Admin Area C: age‐based vaccination programme offered 1992‐94	Non randomised; control areas may not be comparable
Honkanen 2006	404	14 municipalities: risk of disease‐based intervention x 2 years 29 municipalities: age‐based intervention x 2 years 12 municipalities; cross‐over from disease‐based intervention in 1992 to age‐based intervention in 1993	Excluded, control areas may not be comparable
		RETROSPECTIVE CHART REVIEWS
Goebel 2005	564	Retrospective chart review of physicians who used standing orders and did not	Excluded, non‐comparable control
Jacobs 2001	1045	Retrospective chart review of use of interpreters and non‐use	Excluded, non‐comparable control
		COHORTS, NOT HISTORICAL
Bou‐Mias  2006	450	1 group assigned voice mail reminders 1 group no voice mail reminders	Excluded, non‐comparable control
Charles 1994	120	Allocated by physician team: Control Intervention	Excluded, non‐comparable control
Crawford 2005	507	1 group assigned voice mail reminders 1 group no voice mail reminders	Excluded, non‐comparable control
Leirer 1989	1661	2 groups assigned voice mail reminders 2 groups no voice mail reminders	Excluded, non‐comparable control
Margolis 1992	No ref ID as found by reading reference lists	2 clinics assigned as intervention and 2 as control clinics	Excluded, non‐comparable control
		CASE‐CONTROL
Earle 2003	846	Comparison of participants in SEER (Survival, Epidemiology and End Results Tumour Registry) area with case‐matched controls