Estimating the prevalence of infectious diseases from under-reported age-dependent compulsorily notification databases

Table 2 Summary of the results

Results	Current method	First method of [16]	Second method of [16]
Prevalence of Notified HCV Infections	163,902^a 169,382^b	- 240,120^c	- 227,074^c
Prevalence of Non-Notified HCV in Brazil	1,433,638^a 1,446,771^b	- 1,650,100^c	- 1,632,300^c
Total Prevalence of HCV in Brazil	1,597,540^a 1,616,153^b	- 1,890,220^c	- 1,859,374^c

^aUsing only the official SINAN period (2000-2012) assuming zero notification incidence for all years and ages from 2000 backwards until 1932
^b Calculated from real data (2000-2012) and extending the data backwards assuming a sigmoidal decay until 1932
^c Taking the average number of cases reported annually to SINAN between 2004 and 2012, a period in which a steady state could be assumed

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