Table 2

Characteristics of the studies included in this review

Author	Year of publication	Data collection	Study design	Instrument based on	Country	Participants, number GPs	Response rate, %
Sánchez López et al20	2010	2007	Focus groups		Spain	19	100

Carlsen and Norheim17	2008	2007	Semi-structured group interviews		Norway	27	100

Yew and Reid16	2008	2001	Telephone interviews	Green62	US	10	(10/16) = 63
				Hyde63
				Greenhalgh64

Hannes et al15	2005	2002–2003	Focus groups		Belgium	31	100

Tracy et al14	2003	2002	Semi-structured interviews		Canada	15	(15/23) = 65

Freeman and Sweeney34	2001	Unknown	Balint style groups		UK	19	100

Cranney et al13	2001	Unknown	Semi-structured interviews		UK	34	9/76 practices = 12

Oswald and Bateman19	2000	Unknown	Interviews		UK	6	100

Mayer and Piterman18	1999	1996–1997	Focus groups		Australia	27

Kahveci and Meads32	2009	2006–2007	Survey	McColl24	Turkey	138	73

Barghouti et al31	2009	2007	Survey	Al-Almaie65	Jordan	141	71
				Al-Ansary66
				McColl24

Trevena et al30	2007	2003	Telephone interviews	Degner67	Australia	107	(107/155) = 69

Amin et al29	2006	2004	Survey	Fedorowicz68	Bahrain	81	(81/124) = 65

Upton and Upton28	2006	Unknown	Survey	Upton69	UK	302	60

Chan and Teng21	2005	2003	Survey	McColl24	Singapore	40	40

Butzlaff et al23	2004	2001	Randomised controlled trial		Germany	72	73

McKenna et al27	2004	2000–2001	Survey	Funk70	UK	356	65 (overall)
				Nylenna71

Taylor et al26	2002	2000	Survey and interviews		Australia	89	86

Cotton and Sullivan25	1999	1995–1997	Survey		UK	228	74

McColl et al24	1998	1997	Survey		UK	302	(302/452) = 67

Gupta et al22	1997	1993–1995	Survey		Australia	286	77

Young and Ward33	2001	1999	Survey and interviews	McColl24	Australia	60	100
				Young72,73