No chemsex reported | Chemsex reported | HR (95% CI) for chemsex within strata | |||
n | HR | n | HR | ||
Effect modification by age | |||||
18–35 | 750 | 1.57 (1.17 to 2.10) | 290 | 2.69 (1.96 to 3.68) | 1.71 (1.36 to 2.15) |
36–50 | 575 | 1.30 (0.97 to 1.74) | 164 | 1.00 (0.67 to 1.48) | 0.77 (0.55 to 1.07) |
>50 | 254 | 1.00 (ref.) | 53 | 1.53 (0.90 to 2.60) | 1.53 (0.90 to 2.60) |
Effect modification by education | |||||
Secondary or under | 230 | 1.00 (ref.) | 87 | 1.61 (0.98 to 2.64) | 1.61 (0.98 to 2.64) |
Post-secondary | 1349 | 1.16 (0.81 to 1.65) | 420 | 1.47 (1.03 to 2.11) | 1.27 (1.04 to 1.55) |
Effect modification by income ($C) | |||||
≤35 000 | 449 | 1.00 (ref.) | 162 | 1.71 (1.23 to 2.36) | 1.71 (1.23 to 2.36) |
35 001–75 000 | 668 | 1.01 (0.76 to 1.34) | 238 | 1.26 (0.92 to 1.71) | 1.25 (0.96 to 1.63) |
>75 000 | 462 | 1.18 (0.88 to 1.57) | 107 | 1.24 (0.82 to 1.86) | 1.05 (0.72 to 1.54) |
Created by the authors.
Models adjusted for age, education, income, PrEP regimen at baseline and year of entry into the cohort (all categorical).
For education and income, the group size n in each cell is the average group size from the imputed datasets.