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Table 2 Characteristics of included patients overall and by site

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

 

St. Petersburg

Moscow

Czech Republic

Turkey

Beijing

Valencia

Total

 

N = 2715

N = 1400

N = 79

N = 614

N = 1149

N = 3657

N = 9614

Characteristic

n

%

n

%

n

%

n

%

n

%

n

%

n

%

Age in years, median (range)

3 (0–94)

19 (0–90)

51 (19–91)

12 (0–98)

8 (0–96)

73 (0–106)

21 (0–106)

Age group

 0–1 y

714

26.3

137

9.8

0

0.0

112

18.2

76

6.6

476

13.0

1515

15.8

 2–4 y

1034

38.1

371

26.5

0

0.0

133

21.7

403

35.1

265

7.2

2206

22.9

 5–17 y

357

13.1

171

12.2

0

0.0

80

13.0

147

12.8

72

2.0

827

8.6

 18–49 y

426

15.7

632

45.1

38

48.1

38

6.2

106

9.2

221

6.0

1461

15.2

 50–64 y

110

4.1

59

4.2

14

17.7

75

12.2

131

11.4

359

9.8

748

7.8

 65–74 y

39

1.4

13

0.9

12

15.2

69

11.2

93

8.1

593

16.2

819

8.5

 75–84 y

31

1.1

11

0.8

9

11.4

80

13.0

127

11.1

969

26.5

1227

12.8

 ≥85 y

4

0.1

6

0.4

6

7.6

27

4.4

66

5.7

702

19.2

811

8.4

Sex

 Male

1489

54.8

827

59.1

40

50.6

356

58.0

696

60.6

2009

54.9

5417

56.3

 Female

1226

45.2

573

40.9

39

49.4

258

42.0

453

39.4

1648

45.1

4197

43.7

Chronic conditions

 0

2380

87.7

1246

89.0

29

36.7

182

29.6

820

71.4

1210

33.1

5867

61.0

 1

244

9.0

116

8.3

31

39.2

196

31.9

233

20.3

1026

28.1

1846

19.2

 >1

91

3.4

38

2.7

19

24.1

236

38.4

96

8.4

1421

38.9

1901

19.8

Previously hospitalised (last 12 months)

 No

1781

65.6

1123

80.2

56

70.9

341

55.5

964

85.1

2491

68.1

6756

70.4

 Yes

934

34.4

277

19.8

23

29.1

273

44.5

169

14.9

1166

31.9

2842

29.6

Underlying chronic conditions

 Cardiovascular disease

140

5.2

68

4.9

29

36.7

215

35.0

218

19.0

1328

36.3

1998

20.8

 Chronic obstructive pulmonary disease

51

1.9

19

1.4

6

7.6

153

24.9

137

11.9

1093

29.9

1459

15.2

 Asthma

60

2.2

19

1.4

3

3.8

74

12.1

8

0.7

282

7.7

446

4.6

 Immunodeficiency/organ transplant

30

1.1

0

0.0

3

3.8

48

7.8

0

0.0

25

0.7

106

1.1

 Diabetes

32

1.2

14

1.0

12

15.2

96

15.6

34

3.0

860

23.5

1048

10.9

 Renal impairment

18

0.7

26

1.9

4

5.1

61

9.9

12

1.0

485

13.3

606

6.3

 Neuromuscular disease

68

2.5

15

1.1

1

1.3

79

12.9

12

1.0

92

2.5

267

2.8

 Neoplasm

7

0.3

9

0.6

9

11.4

79

12.9

7

0.6

190

5.2

301

3.1

 Cirrhosis/liver disease

34

1.3

21

1.5

5

6.3

19

3.1

5

0.4

118

3.2

202

2.1

Autoimmune disease

13

0.5

14

1.0

4

5.1

22

3.6

0

0.0

122

3.3

175

1.8

Pregnant (women 15–45 y)

0

0.0

291

95.7

1

7.1

1

4.8

0

0.0

5

5.7

298

45.4

Obese (all ages)

263

9.7

162

11.6

12

15.2

109

17.8

155

13.5

957

26.2

1658

17.2

Outpatient consultations last 3 months

 0

1215

44.8

492

35.1

23

29.1

113

18.4

4

0.3

649

17.7

2496

26.0

 1

895

33.0

314

22.4

19

24.1

100

16.3

697

60.9

678

18.5

2703

28.1

 >1

605

22.3

594

42.4

37

46.8

401

65.3

443

38.7

2330

63.7

4410

45.9

Smoking habits (patients ≥18 y)

 Never smoker

325

53.3

345

47.9

40

50.6

135

46.7

269

51.4

1363

47.9

2477

48.9

 Past smoker

76

12.5

136

18.9

19

24.1

117

40.5

162

31

1034

36.4

1544

30.5

 Current smoker

209

34.3

240

33.3

20

25.3

37

12.8

92

17.6

447

15.7

1045

20.6

Functional status impairment (Barthel score; patients ≥65 y)

 Total (0–15)

1

1.4

0

0.0

3

11.1

6

3.4

23

10.0

166

7.3

199

7.1

 Severe (20–35)

1

1.4

0

0.0

1

3.7

3

1.7

19

8.3

71

3.1

95

3.4

 Moderate (40–55)

1

1.4

1

3.3

1

3.7

6

3.4

37

16.1

140

6.2

186

6.6

 Mild (60–90)

25

33.8

6

20.0

9

33.3

76

43.2

136

59.1

414

18.3

666

23.8

 Minimal (95–100)

46

62.2

23

76.7

13

48.1

85

48.3

15

6.5

1473

65.1

1655

59.1

Sampling time

 0–2 days

1351

49.8

655

46.8

20

25.3

125

20.4

324

28.2

896

24.5

3371

35.1

 3–4 days

915

33.7

523

37.4

26

32.9

213

34.7

382

33.2

1572

43.0

3631

37.8

 5–7 days

449

16.5

221

15.8

24

30.4

239

38.9

358

31.2

1058

28.9

2349

24.4

 8–9 days

0

0.0

1

0.1

9

11.4

37

6.0

85

7.4

131

3.6

263

2.7

Influenza vaccination ≥14 days from symptom onset

59

2.2

39

2.8

1

1.3

28

4.6

127

11.1

1759

48.1

2013

20.9