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Table 2 Patterns of SDU and perceptions related PrEP among GBMSM with experience of SDU in the past year

From: Uptake and willingness to use PrEP among Chinese gay, bisexual and other men who have sex with men with experience of sexualized drug use in the past year

 % / Mean (SD)
Patterns of SDU(n = 82)
Types of psychoactive substance used during SDU in past year
 Ketamine1.2
 Methamphetamine31.7
 Cocaine1.2
 Cannabis8.5
 Ecstasy3.7
 Dormicum / Halcion / Erimin 5 / Hypnotic drugs (non-prescription)0.0
 Heroin0.0
 Cough suppressant (not for curing cough)1.2
 Amyl nitrite80.5
 GHB/GBL31.7
 5-methoxy-N, N-diisopropyltryptamine (Foxy)4.9
 Mephedrone0.0
Poly-use of psychoactive substances in lifetime
 No69.5
 Yes30.5
Time since the first episode of SDU
  < 1 year40.2
 1–2 years15.9
 3–5 years15.9
  > 5 years28.0
Frequency of SDU in the past year
 1 episode/month37.8
 1–2 episodes/month29.3
  ≥ 3 episodes/month32.9
Condomless anal intercourse during SDU in the past year
 No48.8
 Yes51.2
Drug cessation/rehabilitation services provided by governmental organizations
 No97.6
 Yes2.4
Drug cessation/rehabilitation services provided by non-governmental organizations
 No90.2
 Yes9.8
Details of the most recent episode of SDU
 Number of participants
  278.0
   ≥ 322.0
 Alcohol consumption
  No85.4
  Yes14.6
 Use of erectile dysfunction drugs
  No69.5
  Yes30.5
 Group sex
  No80.5
  Yes19.5
 Condomless anal intercourse
  No48.8
  Yes51.2
Perceptions related to PrEP (among participants with experience of SDU in the past year who were not on PrEP)(n = 70)
Willingness to take once-daily oral pill as PrEP in the next six months after being briefed some facts of PrEP
 No (definitely not/probably not/neutral)32.9
 Yes (probably will/definitely will)67.1
Willingness to pay (HK$ per month) for using once-daily oral pill as PrEP (among those with willingness to take PrEP in the next six months, n = 56)
  ≤ 30024.2
 301–50014.3
 501–100018.6
 1000–200021.4
 2001–400017.1
 4001–60002.9
 6001–80001.4
  > 80000.0
Perceptions related to PrEP based on the TPB
 Positive attitudes toward PrEP (% agree)
  PrEP can reduce your chance of HIV infection during SDU81.4
  PrEP would reduce your worry of HIV infection when having condomless sex during SDU64.3
  PrEP provides you more choice for HIV prevention84.3
Positive Attitude Scalea8.1 (1.3)
 Negative attitudes toward PrEP (% agree)
  Psychoactive substances that are used during SDU would reduce the protective effect of PrEP17.1
  Psychoactive substances that are used during SDU would aggravate the side-effects of PrEP30.0
  Psychoactive substances that are used during SDU would make you forget to take PrEP28.6
  Daily use of PrEP would cause severe financial burden for you80.0
  You will be stigmatized by medical professionals when you are using PrEP-related services37.1
Negative Attitude Scaleb10.2 (2.2)
 Perceived subjective norm related to PrEP
  People who are important to you will support you to use PrEP
   Disagree/neutral32.9
   Agree67.1
 Perceived behavioral control to use PrEP
  In general, you are confident in taking PrEP every day in the next six months
  Strongly disagree/disagree/neutral35.7
  Agree/strongly agree64.3
  1. Sexualized drug use is defined as use of the following psychoactive substances before/during anal intercourse, including ketamine, methamphetamine, cocaine, cannabis, ecstasy, Dormicum/Halcion/Erimin 5/non-prescription hypnotic drugs, heroin, cough suppressant (not for curing cough), amyl nitrite (popper), GHB/GBL (γ-hydroxybutyrate), 5-methoxy-N, N-diisopropyltryptamine (Foxy), and mephedrone
  2. aPositive Attitude Scale, three items, Cronbach’s alpha: 0.648, one factor was identified by explanatory factor analysis, explaining for 61.6% of the total variance. Higher score of the scale indicated more positive attitudes toward PrEP
  3. bNegative Attitude Scale, five items, Cronbach’s alpha: 0.747, one factor was identified by explanatory factor analysis, explaining for 56.6% of the total variance. Higher score of the scale indicated more negative attitudes toward PrEP