Fig. 3

After adjustments in restricted cubic spline logistic multiple models, the sharp between Blastocystis hominis infection risk and HIV viral load. Model 4 only included HIV viral load. Model 5 was adjusted for gender, age, body mass index, nationality, residence, region, occupation, marital status, education level, family numbers, toilet type, water supply, drinking water, livestock, pet. Model 6 further adjusted for HIV infection route, CD4⁺ T cell counts, HIV infection time, and duration of interruption in highly active antiretroviral therapy