Table 1.

Number of participants and prevalence of second-hand smoke (SHS) exposure by study centre

	n	SHS exposure in ECRHS I, %	SHS exposure in ECRHS II, %	SHS exposure in ECRHS III, %
Antwerp South (Belgium)	104	48.1 (50/104)	32.7 (34/104)	7.7 (8/104)
Antwerp City (Belgium)	99	50.5 (50/99)	36.4 (36/99)	9.1 (9/99)
Hamburg (Germany)	110	46.4 (51/110)	26.4 (29/110)	10.0 (11/110)
Erfurt (Germany)	107	38.3 (41/107)	26.2 (28/107)	6.5 (7/107)
Barcelona (Spain)	54	64.8 (35/54)	40.7 (22/54)	14.8 (8/54)
Galdakao (Spain)	139	74.1 (103/139)	51.1 (71/139)	23.0 (32/139)
Albacete (Spain)	69	68.1 (47/69)	42.0 (29/69)	15.9 (11/69)
Oviedo (Spain)	50	56.0 (28/50)	52.0 (26/50)	28.0 (14/50)
Huelva (Spain)	43	58.1 (25/43)	53.5 (23/43)	18.6 (8/43)
Bordeaux (France)	63	50.8 (32/63)	28.6 (18/63)	6.3 (4/63)
Grenoble (France)	212	34.0 (72/212)	25.5 (54/212)	6.6 (14/212)
Montpellier (France)	88	34.1 (30/88)	13.6 (12/88)	1.1 (1/88)
Paris (France)	186	40.3 (75/186)	33.3 (62/186)	4.8 (9/186)
Pavia (Italy)	51	64.7 (33/51)	47.1 (24/51)	2.0 (1/51)
Turin (Italy)	39	51.3 (20/39)	38.5 (15/39)	12.8 (5/39)
Verona (Italy)	57	35.1 (20/57)	17.5 (10/57)	7.0 (4/57)
Ipswich (UK)	93	31.2 (29/93)	20.4 (19/93)	7.5 (7/93)
Norwich (UK)	88	36.4 (32/88)	11.4 (10/88)	3.4 (3/88)
Reykjavik (Iceland)	197	47.2 (93/197)	26.4 (52/197)	7.1 (14/197)
Bergen (Norway)	186	30.1 (56/186)	11.8 (22/186)	5.4 (10/186)
Gothenburg (Sweden)	149	46.3 (69/149)	6.7 (10/149)	2.7 (4/149)
Umea (Sweden)	162	22.2 (36/162)	8.6 (14/162)	4.9 (8/162)
Uppsala (Sweden)	216	18.1 (39/216)	3.7 (8/216)	1.4 (3/216)
Basel (Switzerland)	221	24.4 (54/221)	16.3 (36/221)	6.8 (15/221)
Melbourne (Australia)	165	13.3 (22/165)	8.5 (14/165)	1.8 (3/165)
Tartu (Estonia)	63	34.9 (22/63)	25.4 (16/63)	3.2 (2/63)
Overall	3011	38.7 (1164/3011)	23.0 (694/3011)	7.1 (215/3011)