Table 3

Associations between chemsex and risk behaviours, sexual healthcare-seeking behaviours and sexual health outcomes in the past year, by perceived HIV status, 2013 and 2016 data combined

Perceived current HIV status
HIV negative/unknown statusHIV positive
% (n/N)PR (95% CI)aPR* (95% CI)% (n/N)PR (95% CI)aPR† (95% CI)
More than 10 male partners in the past year
 No chemsex in the past year23.1 (251/1089)1.001.0036.6 (30/82)1.001.00
 Chemsex in the past year48.4 (136/281)2.10 (1.79 to 2.47)2.11 (1.79 to 2.50)75.8 (50/66)2.07 (1.51 to 2.84)2.21 (1.60 to 3.04)
 P value<0.0001<0.0001<0.0001<0.0001
CAI in the past year
 No chemsex in the past year69.0 (747/1083)1.001.0069.1 (58/84)1.001.00
 Chemsex in the past year77.3 (218/282)1.12 (1.04 to 1.21)1.10 (1.02 to 1.19)92.5 (62/67)1.34 (1.14 to 1.57)1.32 (1.13 to 1.55)
 P value0.0030.0110.00030.0005
CAI with a casual partner in the past year
 No chemsex in the past year32.9 (306/930)1.001.0045.3 (34/75)1.001.00
 Chemsex in the past year47.4 (111/234)1.44 (1.22 to 1.70)1.43 (1.21 to 1.68)75.5 (40/53)1.66 (1.24 to 2.23)1.62 (1.18 to 2.20)
 P value<0.001<0.0010.00070.003
CAI with serodifferent or unknown HIV serostatus partner in the past year
 No chemsex in the past year11.1 (77/697)1.001.0014.3 (8/56)1.001.00
 Chemsex in the past year25.6 (46/180)2.31 (1.67 to 3.21)2.36 (1.68 to 3.30)51.3 (20/39)3.59 (1.76 to 7.33)4.19 (1.85 to 9.50)
 P value<0.0001<0.00010.00050.0006
STI diagnosis in the past year
 No chemsex in the past year13.1 (144/1099)1.001.0020.5 (17/83)1.001.00
 Chemsex in the past year27.5 (77/280)2.10 (1.64 to 2.68)2.10 (1.64 to 2.69)58.2 (39/67)2.84 (1.77 to 4.55)2.56 (1.57 to 4.20)
 P value<0.0001<0.0001<0.00010.0002
Sexual health clinic attendance in the past year
 No chemsex in the past year50.8 (555/1093)1.001.0084.3 (70/83)1.001.00
 Chemsex in the past year68.6 (194/283)1.35 (1.22 to 1.49)1.34 (1.21 to 1.48)95.5 (64/67)1.13 (1.02 to 1.26)1.12 (0.99 to 1.26)
 P value<0.0001<0.00010.0220.083
HIV test in the past year
 No chemsex in the past year65.6 (724/1104)1.001.00
 Chemsex in the past year76.2 (218/286)1.16 (1.08 to 1.26)1.15 (1.06 to 1.25)
 P value0.00010.0005
Two or more HIV tests in the past year
 No chemsex in the past year38.0 (409/1077)1.001.00
 Chemsex in the past year47.6 (131/275)1.25 (1.08 to 1.45)1.27 (1.10 to 1.46)
 P value0.0020.001
  • Denominators may vary due to missing data.

  • *Adjusted for year of survey, age group and education.

  • †Adjusted for year of survey and age group.

  • aPR, adjusted prevalence ratio; CAI, condomless anal intercourse;PR, prevalence ratio.