Fig. 2

After adjustments in restricted cubic spline logistic multiple models, the sharp between Blastocystis hominis infection risk and CD4⁺ T cell counts. Model 1 only included CD4⁺ T cell counts. Model 2 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 3 further adjusted for HIV infection route, HIV viral load, HIV infection time, and duration of interruption in highly active antiretroviral therapy