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Table 1 Crude and Stratum-Specific Rates of Laboratory-Confirmed Pertussis in Greater Toronto Area, 1993-2007

From: Pertussis resurgence in Toronto, Canada: a population-based study including test-incidence feedback modeling

Group Rate per 100,000 Person-Years (95% Confidence Interval)
Overall 3.68 3.54 to 3.82
Age     
0-4 31.39 29.79 to 33.08
5-9 9.46 8.60 to 10.40
10-14 7.43 6.68 to 8.26
15-19 2.05 1.67 to 2.51
20+ 0.57 0.51 to 0.64
Gender     
Male 3.58 3.39 to 3.79
Female 3.77 3.57 to 3.98
Time Period     
Prior to Introduction of PCR (January 1993-December 1998) 2.06 1.89 to 2.24
Initial Introduction of PCR Testing (January 1999-April 2005) 2.06 1.91 to 2.23
Introduction of Highly Sensitive PCR (May 2005-) 10.15 9.64 to 10.70