Table 1

 Increases in saliva cotinine levels after visits to randomly selected bars in urban, suburban and surrounding rural areas of Auckland, Wellington and Invercargill, before and after the introduction the of comprehensive smoke-free legislation in December 2004

Before smoke-free law changeAfter smoke-free law change
Winter round 2004Spring round 2004Winter round 2005Spring round 2005
Participants, n139127103101
    Auckland, n (%)68 (49)48 (38)50 (49)55 (54)
    Wellington, n (%)46 (33)55 (43)33 (32)30 (30)
    Invercargill, n (%)25 (18)24 (19)20 (19)16 (16)
Mean (SE) baseline cotinine (ng/ml)0.25 (0.05)0.17 (0.03)0.05 (0.004)0.05 (0.001)
    Auckland0.26 (0.07)0.15 (0.06)0.03 (0.01)0.02 (0.01)
    Wellington0.28 (0.09)0.15 (0.04)0.09 (0.01)0.06 (0.02)
    Invercargill0.16 (0.04)0.24 (0.10)0.02 (0.01)0.09 (0.04)
Mean (SE) increase in cotinine following visit (ng/ml)0.76 (0.05)0.54 (0.04)0.10 (0.01)0.07 (0.01)
    Auckland0.60 (0.04)0.37 (0.03)0.09 (0.01)0.06 (0.01)
    Wellington0.75 (0.07)0.47 (0.04)0.10 (0.02)0.07 (0.01)
    Invercargill1.26 (0.19)1.03 (0.17)0.12 (0.04)0.10 (0.03)
Total lit cigarette count88992801
    Auckland, n (%)248 (28)190 (20)0 (0)0 (0)
    Wellington, n (%)232 (26)194 (21)0 (0)1 (100)
    Invercargill, n (%)409 (46)544 (59)0 (0)0 (0)
Total count of patrons4944448048494761
    Auckland, n (%)2083 (42)1359 (30)2238 (46)1797 (38
    Wellington, n (%)1600 (32)1677 (37)1470 (301798 (38)
    Invercargill, n (%)1261 (26)1444 (321141 (241166 (24