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Table 3 Suspected and confirmed cases distributed by confirmation criteria, from 2007 to 2015, in São Paulo State, Brazil

From: Challenges of interpreting epidemiologic surveillance pertussis data with changing diagnostic and immunization practices: the case of the state of São Paulo, Brazil

  Confirmed cases
Year Clinical or Clinical epidemiological criteria Laboratory criteria Total Suspected cases % of confirmed among suspected cases % of laboratory confirmed among confirmed cases
2007 68 88 156 645 24.19 56,41
2008 99 168 267 1111 24.03 62,92
2009 54 90 144 641 22.46 62,50
2010 31 151 182 692 26.30 83.97
2011 119 797 916 2787 32.87 87,01
2012 168 873 1041 4962 21.00 83,86
2013 304 1309 1613 7801 20.68 81,15
2014 434 1725 2159 10,258 21.05 79,89
2015 183 369 552 4385 12.59 66,84
χ2      181.25 9.5
p      < 0.01 < 0.01