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Table 1 Prevalence of having tried and being a regular waterpipe user by demographic characteristics and cigarette use

From: Waterpipe smoking in students: Prevalence, risk factors, symptoms of addiction, and smoke intake. Evidence from one British university

   Ever use (n = 937 all students) Regular use (n = 355 all who tried waterpipes)
  Totals n (%) Unadjusted OR (95%CI) Adjusted OR (95%CI)2 n (%) Unadjusted OR (95%CI) Adjusted OR (95%CI)2
Age   N/A 1.02 (0.97–1.07)1 1.00 (0.94–1.06) N/A 0.91 (0.77–1.07) 0.90 (0.74–1.10)
Gender        
   Female 544 (58.1) 193 (35.5%) 1.00 1.00 32 (16.6%) 1.00 1.00
   Male 393 (41.9) 162 (41.2%) 1.28 (0.98–1.67) 1.49 (1.10–2.01) 43 (26.5%) 1.82 (1.09–3.04) 1.86 (1.07–3.23)
Ethnic group        
   White 675 (72.0) 257 (38.1%) 1.00 1.00 48 (18.7%) 1.00 1.00
   Asian 159 (17.0) 65 (40.9%) 1.13 (0.79–1.60) 1.21 (0.83–1.75) 16 (24.6%) 1.42 (0.75–2.71) 1.65 (0.85–3.23)
   Chinese 36 (3.8) 5 (13.9%) 0.26 (0.10–0.68) 0.21 (0.08–0.56) 2 (40.0%) 2.90 (0.47–17.85) 2.51 (0.38–16.82)
   Black 46 (4.9) 12 (26.1%) 0.57 (0.29–1.13) 0.61 (0.30–1.24) 3 (25.0%) 1.45 (0.38–5.56) 1.32 (0.33–5.36)
   Arab 16 (1.7) 13 (81.3%) 7.05 (1.99–24.97) 6.44 (1.73–23.94) 5 (38.5%) 2.72 (0.85–8.69) 2.51 (0.74–8.51)
   Other 5 (0.5) 3 (60.0%) 2.44 (0.41–14.70) 2.38 (0.33–17.02) 1 (33.3%) 2.18 (0.19–24.50) 1.80 (0.12–26.90)
Year of course        
   1 350 (37.4) 101 (28.9%) 1.00 1.00 23 (22.8%) 1.00 1.00
   2 372 (39.7) 158 (42.5%) 1.82 (1.34–2.48) 2.26 (1.61–3.18) 31 (19.6%) 0.83 (0.45–1.52) 1.25 (0.63–2.47)
   3 215 (22.9) 96 (44.7%) 1.99 (1.40–2.84) 2.63 (1.74–3.96) 21 (21.9%) 0.95 (0.49–1.86) 1.79 (0.78–4.09)
Cig smoking        
   No 849 (90.6) 286 (33.7%) 1.00 1.00 49 (17.1%) 1.00 1.00
   Yes 88 (9.4) 69 (78.4%) 7.15 (4.22–12.11) 8.06 (4.63–14.01) 26 (37.7%) 2.93 (1.64–5.20) 2.77 (1.52–5.06)
  1. 1 For a 1 year increase in age.
  2. 2 Adjusted for all variables listed in table