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Table 3 Difference in opinions about SSFs and SIFS by composite measure and specific goals

From: Public opinions about supervised smoking facilities for crack cocaine and other stimulants

  Supervised smoking Supervised injection Difference p-value Design Degrees of Freedom
Goal of facilitya Weighted percent (95 % Confidence Interval) Weighted percent (95 % Confidence Interval) Weighted percent (95 % Confidence Interval)
Composite measure
 Strongly agree 19.6 % (16.5 % to 23.2 %) 28.3 % (24.6 % to 32.3 %) -8.7 % (-12.2 % to -5.2 %) <0.001 772
 Somewhat agree/disagree 64.2 % (60.1 % to 68.2 %) 60.1 % (55.9 % to 64.2 %) 4.1 % (0.1 % to 8.1 %) 0.046
 Strongly disagree 16.1 % (13.3 % to 19.4 %) 11.6 % (9.1 % to 14.6 %) 4.6 % (2.6 % to 6.5 %) <0.001
Supervised smoking facilities should be made available to people who smoke drugs like crack cocaine and methamphetamine to encourage safer drug use
 Strongly agree 20.5 % (17.3 % to 24.%) 30.6 % (27.% to 34.5 %) -10.1 % (-13.7 % to -6.6 %) <0.001 838
 Somewhat agree/disagree 40.5 % (36.5 % to 44.6 %) 40.3 % (36.3 % to 44.4 %) 0.2 % (-4.0 % to 4.3 %) 0.932
 Strongly disagree 39.1 % (35.2 % to 43.1 %) 29.1 % (25.6 % to 32.9 %) 10.% (6.9 % to 13.%) <0.001
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 35.2 % (31.4 % to 39.2 %) 49.4 % (45.4 % to 53.4 %) -14.2 % (-17.7 % to -10.7 %) <0.001 881
 Somewhat agree/disagree 39.9 % (36.0 % to 43.9 %) 32.4 % (28.9 % to 36.2 %) 7.4 % (3.5 % to 11.4 %) <0.001
 Strongly disagree 24.9 % (21.7 % to 28.4 %) 18.1 % (15.3 % to 21.4 %) 6.8 % (4.3 % to 9.3 %) <0.001
Supervised smoking facilities should be made available if they can increase drug users’ contact with health and social workers
 Strongly agree 40.1 % (36.3 % to 44.1 %) 48.3 % (44.4 % to 52.3 %) -8.2 % (-11.3 % to -5.%) <0.001 886
 Somewhat agree/disagree 40.% (36.2 % to 44.%) 37.2 % (33.4 % to 41.1 %) 2.9 % (-0.5 % to 6.3 %) 0.097
 Strongly disagree 19.8 % (16.9 % to 23.1 %) 14.5 % (11.9 % to 17.5 %) 5.3 % (3.1 % to 7.5 %) <0.001
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 45.7 % (41.8 % to 49.7 %) 56.1 % (52.2 % to 60.%) -10.4 % (-13.4 % to -7.4 %) <0.001 910
 Somewhat agree/disagree 36.6 % (32.9 % to 40.4 %) 31.% (27.5 % to 34.8 %) 5.6 % (2.4 % to 8.7 %) <0.001
 Strongly disagree 17.7 % (15.% to 20.8 %) 12.9 % (10.5 % to 15.7 %) 4.8 % (3.1 % to 6.6 %) <0.001
  1. aSupervised injection questions were worded correspondingly to ask about drug injection. Proportions estimated using complex survey designs. Differences calculated using t-distribution for differences with specified degrees of freedom. For our survey design, sample size = design degrees of freedom + number of strata (6)