[Tajectories of the self-efficacy of HIV testing among MSM based on latent class growth model].

Objective: To analyze the trajectories of HIV testing self-efficacy among men who have sex with men (MSM) based on latent class growth model. Methods: From August 2019 to May 2021, 404 MSM were recruited in Shandong Province and subjected to a 1-year follow-up study with individual intervention (pushing intervention pictures and videos in WeChat and follow-up questionnaires) and community intervention (forwarding to friends and sharing and discussing HIV testing-related information in WeChat groups). The level of HIV testing self-efficacy among MSM was measured. The long-term trend of HIV testing self-efficacy was analyzed using the latent class growth model (LCGM), and the influencing factors of the trend were analyzed. Results: A total of 404 MSM were (28.25±8.95) years old, with the oldest being 58 and the youngest being 18. The scores of HIV testing self-efficacy M(Q1, Q3) at baseline and 4 follow-ups were 18.00 (17.00, 21.00), 19.00 (18.00, 22.00), 19.00 (18.00, 22.00), 19.00 (18.00, 22.00) and 19.00 (18.00, 22.00). The results of the freely estimated two-category LCGM model showed that the trend of HIV testing self-efficacy among MSM could be divided into two classes, "intervention response group" [255(63.1%)] and "intervention non-response group" [149(36.9%)]. The former had a higher level of HIV testing self-efficacy which tended to increase at first and then decrease over time, while the latter had a lower and more stable level. The results of the multifactorial logistic regression analysis showed that the OR values of MSM in business or service and jobless or unemployed were 0.261 (95%CI: 0.108-0.633) and 0.186 (95%CI: 0.057-0.610), respectively, using the students as the reference group. Conclusion: There is a group heterogeneity in the trend of HIV testing self-efficacy in the intervention conditions among MSM, and occupation may be an influencing factor.目的： 基于潜类别增长模型分析男男性行为者HIV检测自我效能的变化趋势。 方法： 于2019年8月至2021年5月，在山东省招募404名男男性行为（MSM）人群并进行1年的随访研究，采用个体干预（微信及随访问卷中推送干预图片和视频）与社区干预（朋友圈转发、微信群分享讨论HIV检测相关信息），测量其HIV检测自我效能水平，并采用潜类别增长模型（LCGM）分析HIV检测自我效能的长期发展趋势，并分析发展趋势的影响因素。 结果： 404名MSM年龄为（28.25±8.95）岁，最大58岁，最小18岁；基线和4次随访的HIV检测自我效能得分M（Q1，Q3）分别为18.00（17.00，21.00）、19.00（18.00，22.00）、19.00（18.00，22.00）、19.00（18.00，22.00）、19.00（18.00，22.00）。自由估计的两分类LCGM模型分析结果显示，MSM的HIV检测自我效能发展趋势可分为两类，分别是“干预反应组”［255名（63.1%）］和“干预无反应组”［149名（36.9%）］，“干预反应组”的MSM人群HIV检测自我效能水平较高，且随时间先上升后下降；而“干预无反应组”水平较低且较为稳定。多因素logistic回归分析结果显示，以学生MSM人群为参照组，商业或服务业、无业或失业的MSM的OR值分别为0.261（95%CI：0.108~0.633）和0.186（95%CI：0.057~0.610）。 结论： MSM人群在干预条件下的HIV检测自我效能变化趋势存在群体异质性，职业可能是影响因素。.