Table 6.

Sampling and recruitment procedures with response rates per country

Country	Sampling procedurea	Recruitment methods	FPs invited	FPs participated	Response rate
Europe
Austria	B	E-mail, personal contact	3050	173	6%
Belgium	B	Letter, telephone, e-mail	5000	382	8%
Bulgaria	B	Telephone, face-to-face	350	209	60%
Cyprus	A	Letter, telephone	90	67	74%
Czech Republic	B	Letter, telephone, personal contact	520	205	39%
Denmark	B	E-mail	2000	199	10%
England	C	Letter, e-mail	1508	160	11%
Estonia	A	Letter, telephone, e-mail	802	121	15%
Finland	D	Letter, e-mail, telephone, personal contact	1000	270	27%
Germany	B	Letter	3825	223	6%
Greece	D	Telephone, letter	300	206	69%
Hungary	B	E-mail and personal contact	400	209	52%
Iceland	A	Letter and personal contact	95	75	79%
Ireland	D	Letter, e-mail, personal contact, advertisement	2515	158	6%
Italy	E	Telephone	Not known	204	Not known
Latvia	B	Telephone, e-mail	545	205	38%
Lithuania	B	Personal contact, telephone	508	211	42%
Luxembourg	A	Telephone	120	73	61%
Macedonia	B	Letter, e-mail	240	134	56%
Malta	B	Telephone	78	65	83%
Netherlands	B	Letter, e-mail, telephone	1400	224	16%
Norway	E	Letters, telephone, conferences	500	185	37%
Poland	C	Letter, telephone, e-mail	665	206	31%
Portugal	B	Letter, e-mail, telephone	800	203	25%
Romania	B	Letter, telephone, e-mail, personal contact	399	206	52%
Spain	C	E-mail, telephone	500	402	80%
Slovakia	B	Letter, telephone, personal contact	1000	206	21%
Slovenia	B	Letter, telephone, e-mail	1173	194	17%
Sweden	B	Letter	1000	91	9%
Switzerland	B	Letter, telephone	2027	186	9%
Turkey	C	Letter and personal contact	1300	281	22%
Non-European
Australia	D	Letter	3201	142	4%
Canada	B	Letter, e-mail, telephone	23,671	502	2%
New Zealand	B	Letter	1371	157	11%

Notes: ^aSampling procedures codes: A) almost entire FP population; B) random national sample (stratified or not); C) random sample in pre-selected regions; D) mixed procedure (random procedure plus selected FPs); E) opportunity sampling and volunteers