HIV Statistical Analysis How the San Francisco Department of Public Health turns a 30% decline in HIV infections among gay men into a two-fold increase. by Dr. David Rasnick I have examined a relatively minor study from the San Francisco Department of Public Health, which was carried out in collaboration with the UCSF AIDS Health Project and the Stop AIDS Project (1), to see if one of its conclusions is consistent with the evidence contained in the Department's own statistics. The March 2002 study states that the fraction of gay men who have antibodies to HIV doubled since 1996 (from...