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. 2016 Feb 9;11:8. doi: 10.1186/s13011-016-0052-7

Table 5.

Agreement with goals of a supervised smoking facility by level of awarenessa

Aware of supervised smoking facilities
Goal of facility No (95 % CI) Yes (95 % Cl) Difference (95 % CI) p-value (difference) p-value (distribution) Degrees of freedom
Composite measure
 Strongly agree 16.8 % (13.6 % to 20.6 %) 28.4 % (21.0 % to 37.3 %) 11.6 % (2.7 % to 20.5 %) 0.011 Difference: 829 Distribution: F(1.99, 1652.12) = 4.0000
 Somewhat agree/disagree 66.7 % (62.3 % to 70.8 %) 55.1 % (45.4 % to 64.4 %) -11.6 % (-22.1 % to -1.1 %) 0.030
 Strongly disagree 16.5 % (13.5 % to 20.0 %) 16.5 % (10.5 % to 25.0 %) 0.0 % (-7.9 % to 7.9 %) 0.995 0.019
Supervised smoking facilities should be made available to people who smoke drugs like crack cocaine and methamphetamine to encourage safer drug use
 Strongly agree 17.3 % (14.2 % to 21.0 %) 30.2 % (22.7 % to 38.9 %) 12.8 % (4.0 % to 21.6 %) 0.005 Difference: 889 Distribution: F(1.97, 1752.21) = 5.3906
 Somewhat agree/disagree 41.2 % (37.0 % to 45.6 %) 40.3 % (31.0 % to 50.3 %) -0.9 % (-11.6 % to 9.8 %) 0.863
 Strongly disagree 41.4 % (37.2 % to 45.7 %) 29.6 % (22.0 % to 38.5 %) -11.9 % (-21.2 % to -2.5 %) 0.013 0.005
Supervised smoking facilities should be made available if it can be shown that they reduce infectious disease among people who smoke drugs like crack cocaine and methamphetamine
 Strongly agree 31.8 % (27.8 % to 36.0 %) 46.7 % (37.4 % to 56.3 %) 14.9 % (4.5 % to 25.3 %) 0.005 Difference: 910 Distribution: F(1.98, 1802.95) = 4.4720
 Somewhat agree/disagree 42.3 % (38.1 % to 46.6 %) 30.5 % (22.0 % to 40.5 %) -11.8 % (-22.1 % to -1.6 %) 0.023
 Strongly disagree 25.9 % (22.4 % to 29.7 %) 22.8 % (16.0 % to 31.4 %) -3.1 % (-11.6 % to 5.4 %) 0.478 0.012
Supervised smoking facilities should be made available if they can increase drug users’ contact with health and social workers
 Strongly agree 37.7 % (33.6 % to 42.0 %) 48.8 % (39.3 % to 58.4 %) 11.1 % (0.6 % to 21.6 %) 0.039 Difference: 919 Distribution: F(1.98, 1823.00) = 2.2802
 Somewhat agree/disagree 42.1 % (37.9 % to 46.3 %) 33.1 % (24.3 % to 43.3 %) -9.0 % (-19.5 % to 1.5 %) 0.093
 Strongly disagree 20.2 % (17.1 % to 23.8 %) 18.1 % (12.0 % to 26.4 %) -2.1 % (-10.0 % to 5.8 %) 0.599 0.103
Supervised smoking facilities should be made available if it can be shown that they reduce neighbourhood problems related to use of drugs like crack cocaine and methamphetamine
 Strongly agree 44.0 % (39.8 % to 48.2 %) 50.7 % (41.1 % to 60.2 %) 6.7 % (-3.8 % to 17.2 %) 0.213 Difference: 934 Distribution: F(1.97, 1844.31) = 1.1145
 Somewhat agree/disagree 38.3 % (34.3 % to 42.4 %) 30.7 % (22.0 % to 40.9 %) -7.6 % (-18.0 % to 2.8 %) 0.151
 Strongly disagree 17.8 % (14.9 % to 21.1 %) 18.7 % (12.5 % to 26.9 %) 0.9 % (-6.9 % to 8.8 %) 0.821 0.328

aCI denotes confidence interval. Proportions estimated using complex survey designs. Differences calculated using t-distribution for differences with specified degrees of freedom. Test statistic for distribution uses Pearson’s chi-square test converted to an F-statistic for the survey design with the second-order correction of Rao and Scott with specified degrees of freedom [46]