Department of Psychology, Hunter College of the City University of New York, New York, NY, USA; Doctoral Program in Health Psychology and Clinical Science, Graduate Center of the City University of New York, New York, NY, USA.
Department of Clinical Psychology, Teachers College, Columbia University, New York, NY, USA.
Drug Alcohol Depend. 2021 Aug 1;225:108758. doi: 10.1016/j.drugalcdep.2021.108758. Epub 2021 May 21.
Both marijuana and other illicit drugs (e.g., cocaine/crack, methamphetamines, ecstasy, gamma-hydroxybuterate, and ketamine) have been linked to the occurrence of condomless anal sex (CAS) with casual partners among sexual minority men (SMM) and these associations largely generalize to partnered SMM. Software advances now permit testing the day-level correspondence between participants' sexual behavior and their own drug use (actor effects) as well as their partners' (partner-effects).
Participants comprised 50 couples (100 individuals) recruited in the New York City metro area. All were 18 or older and identified as cis male. In each couple, at least one partner was 18-29 years old, HIV-negative, reported recent (past 30 day) drug use and recent (past 30 day) CAS with a casual partner or CAS with a non-monogamous or sero-discordant main partner at screening.
Marijuana was associated with CAS between main partners on days both partners reported its use. A similar pattern was observed for other illicit drugs. Respondents were more likely to report CAS with casual partners on days CAS between main partners occurred. Both marijuana and other illicit drugs were associated with increased likelihood of CAS with casual partners on days a main partner did not use drugs. These associations were attenuated on days where partners reported the use of different drugs.
The co-occurrence of CAS with main and casual partners maximizes shared sexual risk. Results support the continued emphasis on dyadic HIV prevention interventions and the development of theoretically-based interventions that may address drug use by both partners in the relationship.
大麻和其他非法药物（例如可卡因/快克、冰毒、摇头丸、γ-羟基丁酸和氯胺酮）都与性少数群体男性（SMM）与偶然伴侣发生无保护肛交（CAS）有关，并且这些关联在很大程度上适用于有伴侣的 SMM。软件的进步现在允许测试参与者的性行为与其自身药物使用（演员效应）以及其伴侣（伴侣效应）之间的日水平对应关系。
参与者包括在纽约市大都市区招募的 50 对（100 人）夫妇。所有人年龄均为 18 岁或以上，被确认为顺性别男性。在每对夫妇中，至少有一名伴侣年龄在 18-29 岁之间，HIV 阴性，在筛查时报告最近（过去 30 天）使用过毒品且最近（过去 30 天）与偶然伴侣发生过 CAS 或与非一夫一妻制或血清不一致的主要伴侣发生过 CAS。
大麻与主要伴侣报告使用大麻的日子里与主要伴侣发生的 CAS 有关。其他非法药物也观察到类似的模式。受访者更有可能在主要伴侣发生 CAS 的日子里报告与偶然伴侣发生 CAS。大麻和其他非法药物都与主要伴侣未使用药物的日子里与偶然伴侣发生 CAS 的可能性增加有关。当伴侣报告使用不同药物时，这些关联会减弱。
主要伴侣和偶然伴侣 CAS 的同时发生最大限度地增加了共同的性风险。结果支持继续强调针对伴侣的 HIV 预防干预措施，并制定基于理论的干预措施，以解决伴侣关系中双方的药物使用问题。
