A total of 5321 (42.2%) were aged 41–60 years, 3657 (29.0%) were aged over 60 years old, 7959 (63.1%) were married, 7780 (61.7%) were of Han nationality, 6737 (53.4%) were farmers, almost half of the patients with 60.6% (7644/12,612) had CD4 + T-cell counts < 200 cells/μL, and the most coinfected with opportunistic infections patients also had CD4 + T-cell counts < 200 cells/μL, accounting for 84.4% (6454/8982). Here, CD4 is linked to Opportunistic infection.