t (years) Cumulative distribution of t (%) Year of HIV infection HIV incidence Number of cases with no CD4 count
<1 31.6 2012 47573 16270
≥ 1 and <2 36.8 2011 46957 29677
≥ 2 and <3 42.0 2010 46346 26881
≥ 3 and <4 47.1 2009 45736 24194
≥ 4 and <5 52.2 2008 45130 21572
≥ 5 and <6 57.0 2007 44528 19147
≥ 6 and <7 61.5 2006 43927 16912
≥ 7 and <8 65.6 2005 43331 14906
≥ 8 and <9 69.3 2004 42450 13032
≥ 9 and <10 72.8 2003 41722 11348
≥ 10 and <11 76.1 2002 40970 9792
≥ 11 and <12 79.2 2001 40194 8360
≥ 12 and <13 82.2 2000 39392 7012
≥ 13 and <14 85.0 1999 38562 5784
≥ 14 and <15 87.6 1998 37703 4675
≥ 15 and <16 90.1 1997 36813 3644
≥ 16 and <17 92.4 1996 35890 2728
≥ 17 and <18 94.3 1995 34931 1991
≥ 18 and <19 95.8 1994 33934 1425
≥ 19 and <20 97.0 1993 32723 982
≥ 20 100.0 1992 31646 0
Total   240333
Table 4: Cumulative distribution of time of HIV Infection to first CD4 count (t) and
estimated number of undiagnosed HIV infected cases. Brazil, 2005-2012.
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