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Table 2 The most frequent conditions among 1742 overall category C episodes

From: AIDS-defining illnesses among patients with HIV in Singapore, 1985 to 2001: results from the Singapore HIV Observational Cohort Study (SHOCS)

Condition Confirmed Probable New Recurrent Total (%)
Pneumocystis carinii pneumonia 251 196 399 28 437 (25.1%)
Mycobacterium tuberculosis 194 89 263 20 283 (16.2%)
Cytomegalovirus retinitis 0 166 166 NA1 166 (9.5%)
Candidiasis, esophageal or tracheobronchial 40 96 129 7 136 (7.8%)
Herpes simplex, chronic mucocutaneous 59 84 133 10 143 (8.2%)
Mycobacterium avium, disseminated 141 NA 138 3 141 (8.2%)
Cytomegalovirus disease 79 35 112 2 114 (6.5%)
Cryptococcosis, extrapulmonary 84 NA 78 6 84 (4.8%)
Toxoplasmosis of the brain 2 61 57 6 63 (3.6%)
Mycobacterium, species unidentified 1 33 34 0 34 (2.0%)
Kaposi's sarcoma 17 6 23 0 23 (1.3%)
Cryptosporidiosis, chronic intestinal 19 NA 18 1 19 (1.1%)
Lymphoma, primary cerebral 10 10 20 0 20 (1.1%)
Wasting syndrome of HIV NA 16 16 0 16 (0.9%)
Encephalopathy, HIV-related NA 10 10 0 10 (0.6%)
Pneumonia, recurrent bacterial 9 NA 8 1 9 (0.5%)
Burkitt's lymphoma 9 NA 9 0 9 (0.5%)
Progressive multifocal leukoencephalopathy 2 5 7 0 7 (0.4%)
Histoplasmosis, disseminated 6 NA 6 0 6 (0.3%)
Mycobacterium scrofulaceum, disseminated 5 NA 5 0 5 (0.3%)
Other2 16 1 17 0 17 (1.0%)
  1. 1Following an initial diagnosis of cytomegalovirus retinitis, recurrences were not recorded as additional episodes of category C disease. 2The category designated "other" includes conditions for which four cases or fewer were diagnosed.