Table 2

Factors associated with reported chemsex in the past year, stratified by perceived HIV status

Reported chemsex in 1480 HIV-negative/unknown-status menReported chemsex in 161 HIV-positive men*
% (n/N)PR (95% CI)aPR† (95% CI)% (n/N)PR (95% CI)aPR‡ (95% CI)
Year of survey
 201320.9 (163/781)1.00141.6 (42/101)11
 201618.6 (126/678)0.89 (0.73 to 1.10)0.83 (0.67 to 1.03)41.7 (25/60)1.00 (0.69 to 1.46)0.97 (0.67 to 1.1)
 P value0.3020.0920.9920.882
Age (years)
 16–2417.6 (28/159)1.28 (0.81 to 2.02)1.32 (0.83 to 2.08)50 (1/2)n/an/a
 25–3422.4 (132/595)1.62 (1.15 to 2.28)1.68 (1.18 to 2.38)65.9 (27/41)2.63 (1.54 to 4.51)2.64 (1.54 to 4.52)
 35–4420.3 (86/424)1.47 (1.02 to 2.11)1.52 (1.05 to 2.19)39.1 (25/64)1.56 (0.88 to 2.79)1.56 (0.87 to 2.78)
 ≥4513.8 (35/254)1.001.0025.0 (12/48)1.001.00
 P value0.0400.0320.00030.0003
 Per year (age as continuous variable)0.98 (0.97 to 0.99)0.96 (0.94 to 0.99)
 P value (age as continuous variable)0.0010.002
Ethnicity
 White19.5 (226/1161)1.0041.3 (57/138)1
 Non-white21.6 (63/292)1.11 (0.86 to 1.42)47.6 (10/21)1.15 (0.70 to 1.89)
 P value0.4160.571
Years of education after 16
 0–223.8 (70/294)1.001.0036.8 (14/38)1
 3 or more18.7 (217/1155)0.79 (0.62 to 1.00)0.78 (0.61 to 0.99)43.4 (53/122)1.18 (0.74 to 1.88)
 P value0.0500.0450.487
Employed
 Yes20.4 (264/1297)1.0040.8 (53/130)1
 No15.7 (25/159)0.77 (0.53 to 1.12)44.8 (13/29)1.10 (0.70 to 1.73)
 P value0.1780.683
  • *Due to low numbers, HIV-positive men aged 16–24 years were excluded from analysis.

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

  • ‡Adjusted for year of survey and age group.

  • aPR, adjusted prevalence ratio; n/a, not applicable; PR, prevalence ratio.