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To analyze the status quo and influencing factors of condom use in MSM population, and to provide reference for the formulation of intervention strategies.
From August to October 2022, a questionnaire survey was conducted among 281 MSM in Chengdu, Sichuan Province, including social demographic information, AIDS-related services, behavioral and psychological status. The random forest algorithm was used to reduce and screen the influencing factors of condom use, and then SHAP analysis was used to explain the random forest model after variable screening.
The rate of consistent condom use among MSM in the past 6 months was 65.5 %. When the number of variables after dimensionality reduction was 7, the random forest model had the best performance (AUC: 0.834). The results of SHAP analysis showed that the mean value of the importance of variables and the absolute value of SHAP were the score of condoms use self-efficacy (0.079 0), the score of AIDS-related discrimination (0.051 3), whether there was heterosexual behavior (0.029 9), living conditions (0.011 4), the way to find homosexual partners in the last six months (0.007 8), occupation (0.004 8) and sexual role (0.002 6). MSM who had low condom use self-efficacy scores, high AIDS-related discrimination scores, had heterosexual sex, and had contact with same-sex partners at home had poor condom use adherence, while MSM who lived alone, were students, and had both sex roles had better condom use adherence.
Improving the condom use self-efficacy of MSM, reducing HIV-related discrimination, focusing on and intervening in MSM with heterosexual partners, and MSM who often contact with homosexual partners at home may help to improve the condom use rate of MSM.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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