Figure 3.

Positive rate of sexually transmitted infections (STIs) by sex and age group. (A) Positive rate of Entamoeba histolytica and other STIs were compared between male (n=1474) and female (n=609) clients using Fisher’s exact test. (B) Seropositive rates for E. histolytica and RPR, and TMA positivity for Chlamydia trachomatis were calculated for clients of different age groups (serum, urine samples): 29 years or younger (752, 503), 30–39 years (666, 453), 40–49 years (443, 315), and 50s or older (222, 167). Correlation between age and positivity was calculated using the χ² test for trend. RPR, rapid plasma reagin test; TPHA, Treponema pallidum hemagglutination; TMA, transcription-mediated amplification.