Table 3. Details of hospitalized pertussis case-patients, England and Wales, 2002–2009*.

Age group	No. case-patients (% male)	Mean duration of stay, d
Infants <1 y	2,338 (48)	5.6
<3 mo	1,695 (48)	6.5
3–5 mo	464 (50)	3.6
6–11 mo	179 (41)	2.2
1–4 y	298 (43)	1.5
5–9 y	113 (47)	1.0
10–14 y	82 (46)	0.9
>15 y	43 (37)	5.8

*Case-patients with a primary or subsidiary diagnosis coded as pertussis in Hospital Episode Statistics data.