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Table 1 Sexual behaviour in Ibiza and UK by casual workers in Ibiza (cases) and holidaymakers (controls)

From: Sexual behaviour among casual workers in an international nightlife resort: a case control study

   Cases Controls   
   % n % n X 2 P
Total sample   92 828   
Visited Ibiza with partner (%) Yes 15.4 91 23.2 793 2.871 0.090
Had sex in Ibiza (%) Yes 81.5 92 49.7 729 33.317 <0.001
Used alcohol in:        
   Ibiza (%) Yes 98.9 92 98.4 819 0.137 0.711
   UK (%) Yes 97.8 89 99.0 822 1.201 0.273
Used drugs in:        
   Ibiza (%) Yes 95.7 92 51.2 819 66.339 <0.001
   UK (%) Yes 95.6 90 57.4 820 49.624 <0.001
Those arriving in Ibiza without a partner only
Sub sample   77 610   
Had sex in Ibiza (%) Yes 80.5 77 40.7 550 43.112 <0.001
Number of sexual partners (%) 0 20.5 73 59.4 549   
  1 21.9   19.1    
  2–5 34.2   13.7    
  6+ 23.3   7.8   50.919 <0.001
Had sex with non UK resident in Ibiza (%)* Yes 27.4 73 11.4 500 14.014 <0.001
Number of sexual partners in 6 months prior to visiting Ibiza (%) 0 2.8 72 14.3 546   
  1 26.4   39.4    
  2–5 56.9   36.8    
  6+ 13.9   9.5   17.133 <0.001
Those arriving in Ibiza without a sexual partner and having sex in Ibiza only
Sub sample   62 224   
Had unprotected sex Yes 65.5 58 40.4 223 11.746 <0.005
Number of unprotected partners in Ibiza(%) 0 34.5 58 59.6 223   
  1 17.2   20.2    
  2–5 34.5   12.1    
  6+ 13.8   8.0   20.959 <0.001
Number of sexual partners per week spent in Ibiza (%) <1 91.1 56 19.8 222   
  1–2 5.4   50.0    
  >2 3.6   30.2   100.927 <0.001
  1. n = number of respondents
  2. * Respondents providing a "don't know" response were classified as no for this analysis (n = 28)