Background and objectives: Prospective studies of incidental sexually transmitted diseases in developing countries rarely have been reported. As the human immunodeficiency virus epidemic widens, knowledge of the epidemiology of sexually transmitted diseases as co-factors for human immunodeficiency virus infection is viewed as vitally important.
Goal: To determine epidemiologic risk factors for incidental sexually transmitted diseases in young men in northern Thailand.
Study design: A cohort of 2,417 men selected by lottery for military conscription was followed an average of 22 months, with epidemiologic risk factors and sexually transmitted disease histories assessed semiannually. Sexually transmitted diseases were determined by physician or symptom histories obtained by interview.
Results: Sexually transmitted disease incidence was 17.04 per 100 person-years. Gonorrhea and chancroid were commonly reported, whereas incident syphilis was rare. Sexually transmitted disease incidence declined significantly in the 2-year period. Most sexually transmitted diseases were acquired through commercial sex patronage. However, among men who did not report visiting a brothel, there was a significant increase in sexually transmitted diseases among men reporting sex with a girlfriend. Other risk factors included inconsistent condom use, drug use, and low educational level. Frequent alcohol use was associated with incident sexually transmitted diseases in bivariate analysis, but drinking at the time of last brothel visit was not associated with increased sexually transmitted diseases.
Conclusions: Sexually transmitted disease control in Thailand is based on an integrated sexually transmitted disease clinic system. Many commercial sex workers are examined and treated routinely, but too infrequently to reduce sexually transmitted disease transmission between them and their male clients. Condom-use levels in commercial sex settings still may be too low to reduce sexually transmitted disease transmission. More consistent and effective sexually transmitted disease treatment of commercial sex workers and their clients and education of men on the effective and consistent use of condoms is required to reduce the risks of sexually transmitted disease transmission in this population.
PIP: A cohort of 2417 male military conscripts had their epidemiologic risk factors for exposure to sexual transmitted diseases (STD) and STD histories assessed semiannually for an average of 22 months. STDs were determined by physician or symptom histories obtained during interview. These measures were undertaken to determine the epidemiologic risk factors for incidental STDs in young men in northern Thailand. The incidence of STD was 17.04 per 100 person-years. Gonorrhea and chancroid were commonly reported, while it was rare to see syphilis. The incidence of STD declined significantly during the two-year period. Most STDs were acquired through having sex with prostitutes. However, among men who did not report visiting a brothel, there was a significant increase in STDs among men reporting having sex with their girlfriends. Other risk factors included inconsistent condom use, drug use, and low educational level. Frequent alcohol use was associated with incident STDs in bivariate analysis, but drinking at the time of last brothel visit was not associated with increased STDs.