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.

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