Table 2

Chemsex* behaviour and drug used, among 161 MSM who reported non-consensual sexual experience† and 730 MSM who did not, in Amsterdam, the Netherlands between August 2018 and August 2019

VariablesNon-consensual sexual experience†, yes n=161 (18.1%), n (%)Non-consensual sexual experience†, no n=730 (81.9%), n (%)P valueTotal
n=891 (%), n (%)
Median age (IQR), years33 (25–46)40 (30–50)<0.00139 (30–50)
Age categories, years (missing n=2)<0.001
 ≤2436 (22.4)62 (8.5)98 (11.0)
 25–3449 (30.4)197 (27.0)246 (27.6)
 35–4429 (18.0)175 (24.0)204 (22.9)
 45–5434 (21.1)196 (26.8)230 (25.8)
 55–6411 (6.8)82 (11.2)93 (10.4)
 ≥652 (1.2)18 (2.5)20 (2.2)
Sex in <6 months with0.003
 Men141 (87.6)689 (94.4)830 (93.2)
 Both men and women20 (12.4)41 (5.6)61 (6.8)
Residency (missing n=1)0.729
 Amsterdam78 (48.4)334 (45.8)412 (46.3)
 Outside of Amsterdam81 (50.3)381 (52.3)462 (51.9)
 Abroad2 (1.2)14 (1.9)16 (1.8)
STI/HIV test in the last year0.561
 No30 (18.6)161 (22.1)191 (21.4)
 Yes, at the Public Health Service of Amsterdam50 (31.1)204 (27.9)254 (28.5)
 Yes, somewhere else81 (50.3)365 (50.0)446 (50.1)
Chemsex* <6 months58 (36.0)215 (29.5)0.109273 (30.6)
GHB/GBL (G) use during sex <6 months53 (32.9)200 (27.4)0.176253 (28.4)
 Frequency0.053
 Once per month or less22/53 (41.5)120/200 (60.0)142/253 (56.1)
 2–4 per month23/53 (43.4)67/200 (33.5)90/253 (35.6)
 2–3 a week4/53 (7.5)7/200 (3.5)11/253 (4.3)
 ≥4 a week4/53 (7.5)6/200 (3.0)10/253 (4.0)
Crystal methamphetamine (C) use during sex <6 months25 (15.5)62 (8.5)0.00987 (9.8)
 Frequency0.434
 Once per month or less14/25 (56.0)46/62 (74.2)60/87 (69.0)
 2–4 per month8/25 (32.0)12/62 (19.4)20/87 (23.0)
 2–3 a week2/25 (8.0)2/62 (3.2)4/87 (4.6)
 ≥4 a week1/25 (4.0)2/62 (3.2)3/87 (3.4)
Mephedrone (M) use during sex <6 months20 (12.4)47 (6.4)0.01367 (7.5)
 Frequency0.059
 Once per month or less11/20 (55.0)39/47 (83.0)50/67 (74.6)
 2–4 per month5/20 (25.0)4/47 (8.5)9/67 (13.4)
 2–3 a week2/20 (10.0)1/47 (2.1)3/67 (4.5)
 ≥4 a week2/20 (10.0)3/47 (6.4)5/67 (7.5)
Type of chemsex drugs used during sex <6 months‡0.078
 G only24/58 (41.4)129/215 (60.0)153/273 (56.0)
 G and C9/58 (15.5)30/215 (14.0)39/273 (14.3)
 G and M9/58 (15.5)20/215 (9.3)29/273 (10.6)
 C and G and M11/58 (19.0)21/215 (9.8)32/273 (11.7)
 C only5/58 (8.6)9/215 (4.2)14/273 (5.1)
 M only0/58 (0)4/215 (1.9)4/273 (1.5)
 C and M0/58 (0)2/215 (0.9)2/273 (0.7)
Injecting drugs <6 months10 (6.2)15 (2.1)0.00825 (2.8)
 Shared needles3/10 (30.0)1/15 (6.7)0.2674/25 (16.0)
Sober sex last time§0.045
 In the past month36/58 (62.1)166/215 (77.2)202/273 (74.0)
 Longer than 3 months ago5/58 (8.6)20/215 (9.3)25/273 (9.2)
 Longer than 6 months ago5/58 (8.6)11/215 (5.1)16/273 (5.9)
 Longer than 1 year ago8/58 (13.8)14/215 (6.5)22/273 (8.1)
 I do not remember4/58 (6.9)4/215 (1.9)8/273 (2.9)
Condomless anal chemsex44 (27.3)161 (22.1)0.178205 (23.0
  • *The use of any combination of drugs, including crystal methamphetamine, mephedrone, and/or GHB/GBL before or during sex in past 6 months.

  • †Non-consensual sexual experience was defined as ‘where someone went beyond your limits or where you had an unpleasant experience’ (eg, filmed/photographed without consent, had sexual contact against their will, etc).

  • ‡It is not known whether drugs were consumed at the same time or sequential.

  • §Last time having sex without any of the chemsex-associated drugs.

  • GHB/GBL, gamma-hydroxybutyrate/gamma-butyrolacton; MSM, men who have sex with men.