Characteristics of pertussis outbreaks in Catalonia, Spain, 1997 to 2010

Figures & data

Table 1. Associated cases rate by age group and sex. Catalonia, 1997–2010

Affected	Incidence rate* (95%CI)
Age group	Total	Male	Female	RR	P
<1 y	19.08 (16.42–22.05)	19.63 (15.93–23.92)	18.49 (14.79–22.84)	0.94 (0.70–1.27)	0.743
1–4 y	2.58 (2.09–3.15)	1.91 (1.35–2.64)	3.29 (2.51–4.24)	1.72 (1.12–2.67)	0.011
5–9 y	1.91 (1.53–2.37)	1.86 (1.34–2.52)	1.97 (1.42–2.66)	1.06 (0.67–1.66)	0.881
10–14 y	1.45 (1.11–1.85)	1.32 (0.89–1.88)	1.58 (1.10–2.21)	1.20 (0.71–2.03)	0.545
15–24 y	0.26 (0.17–0.37)	0.15 (0.07–0.29)	0.37 (0.23–0.57)	2.46 (1.08–6.10)	0.030
25–44 y	0.47 (0.40–0.55)	0.31 (0.23–0.41)	0.65 (0.52–0.79)	2.08 (1.47–2.99)	< 0.001
>45 y	0.11 (0.08–0.15)	0.08 (0.05–0.14)	0.13 (0.09–0.19)	1.55 (0.79–3.13)	0.226

* Per 100 000 person-year; CI, confident interval; RR, Rate Ratio.

Figure 1. Pertussis outbreaks, associated cases and hospitalization rates by year. Catalonia, 1997–2010.

Figure 2. Pertussis cases associated with reported outbreaks by age group and year. Catalonia, 1997–2010.