Table 4.

Incidence per 100 000 individuals of hospital admissions and in-hospital treatment (days) for pneumonia over all in influenza vaccinated individuals (65 – 79 years) compared with the unvaccinated cohort during the influenza- and non-influenza seasons.

	Hospital admission				In-hospital treatment
Influenza seasons	Vaccinated	Reduction (95% CI)	Unvaccinated	p	Vaccinated	Reduction (95% CI)	Unvaccinated	p
2003	199		388		1548		1781
		49% (0,26–0,99)		< 0.04		13% (0,68–1,1)		< 0.7
2004	193		310		1408		1982
		38% (0,28–1,36)		< 0.15		29% (0,53–0,95)		< 0.02
2005	144		319		865		1691
		55% (0,28–1,36)		< 0.04		49% (0,34–0,78)		< 0.001
Non-influenza seasons
2003	119	49% (0,21–1,20)	231	< 0.2	615	63% (0,26–0,55)	1646	< 0.001
2004	304	- 17% (0,62–2,32)	253	< 0.6	2126	- 31% (1,12–1,85)	1482	< 0.01
2005	252	- 10% (0,60–3,06)	226	< 0.8	1983	- 20% (0,93–1,70)	1583	< 0.2