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Table 1 Descriptive characteristics of pertussis cases

From: Epidemiology of pertussis in Alberta, Canada 2004–2015

   Number of cases (%)
Total number of cases   3510 (100)
Year of diagnosis 2004 664 (18.9)
2005 452 (12.9)
2006 211 (6.0)
2007 128 (3.6)
2008 239 (6.8)
2009 193 (5.5)
2010 68 (1.9)
2011 114 (3.2)
2012 326 (9.3)
2013 302 (8.6)
2014 378 (10.8)
2015 435 (12.4)
Age groups (years) <1 403 (11.5)
1–4 576 (16.4)
5–9 539 (15.4)
10–14 798 (22.7)
15–19 308 (8.8)
20+ 886 (25.2)
Gender Female 1882 (53.6)
Male 1627 (46.4)
Unknown 1 (0)
Health zone Calgary 357 (10.2)
Central 815 (23.2)
Edmonton 751 (21.4)
North 946 (27.0)
South 406 (11.6)
N/Aa 235 (6.7)
Vaccination histories among cases:
 Never vaccinated   1370 (39.0)
 Vaccinated after disease diagnosis   515 (14.7)
 Vaccinated out-of-province   324 (9.2)
Number of people vaccinated in Alberta before diagnosis   1301 (37.1)
Number of doses received by people vaccinated in Alberta prior to disease 1 131 (10.0% of those vaccinated)
2 53 (4.1)
3 130 (10.0)
4 247 (19.0)
5+ 740 (56.9)
Duration of vaccine protection 2 weeks to 1 month 42 (3.2)
1–2 months 25 (1.9)
2–3 months 19 (1.5)
3 months to 1 year 94 (7.2)
1–3 years 206 (15.8)
3–5 years 131 (10.1)
5+ years 784 (60.3)
Timeliness (Number of cases vaccinated at specified ages for recommended doses) 2 months 982 (75.5% of vaccinated cases)
4 months 809 (65.4)
6 months 703 (58.8)
18 months 473 (41.6)
4–6 years 755 (80.7)
14–16 years 317 (71.2)
  1. aN/A: health zone information was missing