Risk Factors for Trichomonas vaginalis Infection among Affected Women with One of the Sexually Transmitted Infections: A CaseCohort Study

Trichomonas vaginalis is the most common non-viral sexual infection (a protozoan parasite) that affects 276 million people in the world, annually, and it’s transmitted in adults by sexual contacts without condom. The aim of this study was to determine of risk factors for the incidence of Trichomoniasis in affected women with one of the sexually transmitted infections in a 2-years period.

In this case cohort study, 547 syndromic cases of trichomoniasis screened by census method, 38 etiologic patients were identified and selected as cases. The control group were 3-times the cases using simple random sampling. The statistical analysis was performed with a total sample size of 152 people using univariate (P <0.20) and multivariate logistic regression model (P < 0.05). Direct smear using Hematoxylin-Eosin staining method was used for laboratory diagnosis.

The prevalence of syndromic and etiologic trichomoniasis in affected women with one of the sexually transmitted infections was 48.9% and 3.4%, respectively. The "age of the patient" (P = 0.001, OR = 1.08, 95% CI = 1.03-1.14) and "education level" (P = 0.003, OR = 0.29, 95% CI = 0.13-0.64) were considered as risk factor and Protective agent in the incidence of trichomoniasis infection, respectively.

The findings of this study indicate a high prevalence of infection in patients with clinical symptoms. Level of education Reduction and increasing age of the patient are the most important factors in increasing the risk of infection, and it is necessary to reinforcement the regular prevention and screening programs at aged 25-44 years.