[Analysis of characteristics of anonymous online dating and related factors of not being tested for HIV among men who have sex with men in Shandong Province].

To analyze the characteristics of anonymous online dating and related factors of not being tested for HIV among men who have sex with men and to provide the basis for developing targeted HIV prevention strategies and intervention measures. Using a cross-sectional study design, respondents were recruited with the assistance of MSM social organizations from April to July 2023 in eight cities in Shandong Province. Snowball sampling, activity venues, and networks were employed, targeting a sample size of 400 people per city.