ปัจจัยที่สัมพันธ์กับการติดเชื้อซิฟิลิสในกลุ่มชายที่มีเพศสัมพันธ์กับชาย

บทคัดย่อ

         The objective of this research was to determine factors associated with syphilis infection among men who have sex with men. This research was a case-control study divided into 85 syphilis-infected patients as the case group and 103 non-syphilis-infected patients as the control group from the Bangrak STIs center and the Rainbow Sky Association of Thailand. The inclusion criteria of participants were men who had anal sex with men aged 18 years and over, not transgender women or men, no history of treatment for syphilis, and the anti-HIV test result was negative. The sexual behavior questionnaire was used as a data collection instrument. Syphilis diagnosis uses the examination method chemiluminescence immunoassay (CIA) or Treponema pallidum hemagglutination assay (TPHA). The data were analyzed using percentage, odds ratio, and 95% confidence interval.

         The results showed that the subjects who sometimes used or did not use condoms during anal intercourse were 27.45 times more likely to develop syphilis than those who consistently used condoms (aOR=27.45, 95%CI=9.23 – 81.68, p < .001), and those in the receptive anal sex role were 4.85 times more likely to develop syphilis than those in other roles (aOR=4.85, 95%CI=1.72 – 13.73, p=0.003).

          Anal sex among MSM, especially those who have had an unprotected insertion in MSM, is a major contributor to syphilis. Therefore, the agencies involved in sexually transmitted diseases should promote and make the service recipients aware of the importance of prevention and screening for syphilis when risky behaviors occur.