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Table 3 Estimated influenza-associated excess hospitalizations in children aged < 5 years old, in absolute number of cases and per 100,000 children, by group of diagnoses and epidemic season in Portuguese public hospitals between 2008/09 and 2017/18 seasons

From: Uncovering the burden of Influenza in children in Portugal, 2008–2018

  

2008/ 2009

2009/ 2010

2010/ 2011

2011/ 2012

2012/ 2013

2013/ 2014

2014/ 2015

2015/ 2016

2016/ 2017

2017/ 2018

P&I

N

119

570

183

40

-b

259

84

278

101

215

95% CI

40–207

512–629

115–262

-28 to 103

-266 to -119

198–312

27–135

207–334

40–155

132–281

Ratea

23.0

112.6

37.0

8.2

-b

56.8

19.0

64.4

23.8

50.1

R

N

-b

95

-b

-b

-b

367

-b

646

-b

652

95% CI

-1313 to -658

-171 to 374

-1147 to -533

-412 to 99

-1740 to -1158

152–596

-1287 to -817

373–895

-382 to 109

351–929

Ratea

-b

18.8

-b

-b

-b

80.5

-b

149.3

-b

152.2

R&C

N

-b

93

-b

-b

-b

381

-b

652

-b

662

95% CI

-1339 to -689

-176 to 371

-1166 to -556

-405 to 105

-1754 to -1169

165–613

-1,292 to -820

377–909

-387 to 105

364–942

Ratea

-b

18.3

-b

-b

-b

83.4

-b

150.8

-b

154.7

All-cause

N

-b

-b

922

214

-b

-b

-b

743

-b

-b

95% CI

-2442 to -1097

-994 to 145

323–1576

-428 to 862

-4506 to -3112

-1718 to -516

-1934 to -928

72-1382

-1380 to -335

-1147 to 297

Ratea

-b

-b

186.4

44.0

-b

-b

-b

171.8

-b

-b

  1. Abbreviations: CI - Confidence interval (of the N); N - Number of excess hospitalizations; R – Respiratory; R&C - Respiratory or cardiovascular; P&I - Pneumonia or influenza
  2. a Rate of influenza-associated excess hospitalizations per 100,000 children aged < 5 years old; b No influenza-associated excess hospitalizations estimated in this season