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Table 2 Estimated HIV-1 Incidence of HIV infection among 9,008 individuals (434 seropositive samples) screened in 3 VCTs of Rio de Janeiro Metropolitan area from November 2004 to October 2005 - conventional estimation and estimation with 2 corrective factors (CF).

From: Prevalence, estimated HIV-1 incidence and viral diversity among people seeking voluntary counseling and testing services in Rio de Janeiro, Brazil

  Recent
Infections
Estimate Incidencea
%/year (95% CI)
Estimate Incidenceb
%/year (95% CI)
Estimate Incidencec
%/year (95% CI)
Overall = 434 61 1.68 (1.26 - 2.10) 1.09 (1.32 - 1.87) 1.17 (0.88 - 1.47)
Gender     
   Female (191) 30 1.40 (0.90 - 1.90) 0.97 (0.62 - 1.31) 1.04 (0.67 - 1.41)
   Male (243) 31 2.10 (1.36 - 2.84) 1.27 (0.82 - 1.72) 1.37 (0.89 - 1.85)
Exposure categories
(among men)
    
   Heterosexual (144) 15 1.12 (0.55 - 1.68) 0.56 (0.28 - 0.84) 0.60 (0.30 - 0.91)
   MSM (99) 16 11.96 (6.10 - 17.82) 8.55 (4.36 - 12.74) 9.17 (4.68 - 13.67)
Age (years)     
   <25 (65) 9 0.87 (0.30 - 1.44) 0.56 (0.19 - 0.92) 0.60 (0.21 - 0.99)
   25 to 40 (233) 34 2.33 (1.55 - 3.12) 1.55 (1.03 - 2.07) 1.67 (1.11 - 2.23)
   >40 (136) 18 1.59 (0.86 - 2.33) 0.99 (0.53 - 1.45) 1.07 (0.57 - 1.56)
  1. a Incidence estimated with conventional estimation [9]
  2. b CF1 = Incidence estimated with Corrective Factor 1 [12]
  3. c CF2 = Incidence estimated with Corrective Factor 2 [13]