Joint replacement and human immunodeficiency virus

Table 1 Classification of laboratory categories based on age-specific CD4+ T-lymphocyte count

Age on date of CD4+ T-lymphocyte test
Stage	< 1 yr		1–5 yr		≥ 6 yr
	Cells/µL	%	Cells/µL	%	Cells/µL	%
1	≥ 1500	≥ 34	≥ 1000	≥ 30	≥ 500	≥ 26
2	750-1499	26-33	500-999	22-29	200-499	14-25
3	< 750	< 26	< 500	< 22	< 200	< 14

Table 2 Classification clinical category

Clinicalcategory	Symptomatic conditions
A	Asymptomatic HIV infection, persistent generalized lymphadenopathy, acute (primary) HIV infection complicated by illness, or a history of acute HIV infection. Bacillary angiomatosis
B	Candida infection, cervical dysplasia, constitutional symptoms, hairy leukoplakia, herpes zoster, unexplained thrombocytopenic purpura, listeriosis, pelvic inflammatory disease, and peripheral neuropathy.
C	AIDS-defining diseases: Toxoplasmosis, Kaposi's sarcoma, Pneumocystis pneumonia

HIV: Human immunodeficiency virus; AIDS: Acquired immunodeficiency syndrome.