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Table 4 Subject characteristics and risk of admission with influenza

From: Influenza epidemiology and influenza vaccine effectiveness during the 2014鈥�2015 season: annual report from the Global Influenza Hospital Surveillance Network

听

All admissions

Influenza-positive

Crude OR

Heterogeneity by strain (I2)a

aORb

听

N鈥�=鈥�9164

N鈥�=鈥�2177

Characteristic

n

n

%

Value

95听% CI

Value

95听% CI

Age

鈥�0鈥�1 y

1515

144

9.5

1.00

-

32.5听%

1.00

-

鈥�2鈥�4 y

2206

429

19.4

2.30

1.88-2.81

0.0听%

2.14

1.74-2.64

鈥�5鈥�17 y

827

280

33.9

4.87

3.90-6.10

73.3听%

4.34

3.42-5.51

鈥�18鈥�49 y

1461

423

29.0

3.88

3.16-4.77

59.2听%

3.11

2.49-3.90

鈥�50鈥�64 y

748

191

25.5

3.26

2.57-4.14

72.5听%

4.08

3.11-5.36

鈥�65鈥�74 y

819

211

25.8

3.30

2.62-4.17

67.8听%

4.99

3.76-6.64

鈥�75鈥�84 y

1227

294

24.0

3.00

2.42-3.72

62.4听%

4.51

3.43-5.92

鈥冣墺85

811

205

25.3

3.22

2.55-4.07

71.2听%

4.79

3.59-6.40

Sexc

鈥僊补濒别

5417

1141

21.1

1.00

-

0.0听%

1.00

-

鈥僃别尘补濒别

4197

1036

24.7

1.24

1.13-1.37

0.0听%

1.21

1.09-1.34

鈥僃别尘补濒别 non-pregnant

3899

876

22.5

1.11

1.00-1.22

0.0听%

1.10

0.99-1.23

Other risk factors (excludes pregnant women)

鈥僀辞尘辞谤产颈诲颈迟测d

3709

856

23.1

1.15

1.04-1.27

62.8听%

1.48

1.30-1.69

鈥僀ardiovascular disease

1996

468

23.4

1.17

1.04-1.33

22.2听%

1.47

1.25-1.72

鈥僀hronic obstructive pulmonary disease

1458

306

21.0

1.02

0.88-1.17

57.6听%

1.39

1.15-1.68

鈥倾蝉迟丑尘补

440

96

21.8

1.07

0.84-1.35

0.0听%

1.37

1.04-1.80

鈥僆尘尘耻苍辞蝉耻辫辫谤别蝉蝉颈辞苍

106

14

13.2

0.58

0.33-1.03

0.0听%

0.76

0.40-1.46

鈥僁颈补产别迟别蝉

1048

234

22.3

1.10

0.94-1.29

0.0听%

1.36

1.10-1.70

鈥僐enal disease

588

129

21.9

1.08

0.88-1.32

48.2听%

1.23

0.95-1.59

鈥僋别耻谤辞尘耻蝉肠耻濒补谤

167

52

31.1

0.93

0.68-1.26

38.9听%

1.13

0.80-1.58

鈥僋eoplasm (active)

301

63

20.9

1.01

0.76-1.35

55.6听%

1.29

0.92-1.81

鈥僉iver disease

200

33

16.5

0.76

0.52-1.11

50.8听%

0.79

0.52-1.21

鈥傾utoimmune disease

161

39

24.2

1.22

0.85-1.77

0.0听%

1.44

0.95-2.18

鈥僌产别蝉别e

1620

337

20.8

1.0

0.9-1.2

0.0听%

0.87

0.73-1.03

Pregnancyf

298

160

53.7

3.45

2.23-5.34

0.0听%

2.08

1.43-3.03

鈥傾ssociated comorbidity

38

26

68.4

7.07

3.09-16.18

0.0听%

4.29

2.65-6.94

鈥僋o comorbidity

260

126

48.5

3.05

2.08-4.47

0.0听%

1.80

1.22-2.66

  1. aStrains considered: A(H3N2), A(H1N1)pdm09 and B/Yamagata
  2. bMinimal sufficient adjustment sets for estimating the exposure or risk factor effect on the risk of admission with influenza vs. all included admissions without underlying conditions or pregnant
  3. cFemale or female non-pregnant vs. male. aORs were adjusted for age, occupational social class group, underlying comorbidity, obesity, influenza vaccination, time to swab, calendar time, and site as a clustering factor
  4. dOne or more underlying conditions or individual comorbidities vs. no comorbidity. aORs were adjusted for sex, occupational social class group, obesity, influenza vaccination, time to swab, calendar time, and site as a clustering factor
  5. eaOR adjusted for sex, age, occupational social class group, influenza vaccination, time to swab, calendar time, and site as a clustering factor
  6. fWomen 15-45 years of age included in Moscow, St. Petersburg, Czech Republic, Turkey and Valencia. aOR adjusted for smoking habits, time to swab, calendar time, comorbidity, and site as a clustering factor. For results stratified by comorbidity, aORs were adjusted by the same covariates and were estimated taking into account the interaction between pregnancy and comorbidity
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