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Table 1 Clinical characteristic of influenza associated hospitalizations during the 2017-2018 influenza and 2011-2017 seasons

From: Clinical characteristics and outcomes during a severe influenza season in China during 2017–2018

Variables n (%)

2011-2017 (n = 169)

2017-2018 (n = 289)

P value

Gender-male

102 (60.4)

169 (58.5)

0.693

Age groups

 <14 years

22 (13.0)

37 (12.8)

 

 14- years

81 (47.9)

129 (44.6)

0.751

 >=60 years

66 (39.1)

123 (42.6)

 

Co-morbidities

 Cardiovascular diseases

55 (32.5)

120 (41.5)

0.056

 Respiratory diseases

17 (5.9)

24 (8.3)

0.526

 Chronic renal diseases

11 (6.5)

22 (7.6)

0.659

 Chronic liver diseases

11 (6.5)

27 (9.3)

0.289

 Diabetes mellitus

18 (10.7)

29 (10.0)

0.834

 Cancer and hematological diseases

56 (33.1)

83 (28.7)

0.321

 Stroke and Neuromuscular diseases

15 (8.9)

17 (5.9)

0.225

 Immunosuppressant

19 (11.2)

38 (13.1)

0.551

Pregnancy

0 (0)

2 (0.7)

0.533

Postmortum within 30 days after delivery

0 (0)

1 (0.3)

1.000

Current smoking

20 (6.9)

57 (19.7)*

0.029

Received seasonal or influenza A (H1N1) vaccination

0 (0)

0 (0.0)

NA

Symptoms and Lab findings

 Fever (temp >=38)

159 (94.1)

257 (88.9)

0.065

 Cough

141 (83.4)

247 (85.5)

0.559

 Dyspnea

17 (5.9)

50 (17.3)*

0.034

 Hemoptysis

5 (3.0)

14 (4.8)

0.329

 CNS symptom

2 (1.2)

11 (3.8)

0.180

 WBC<4

50 (29.6)

70 (24.2)

0.266

 L%<20%

97 (59.1)

162 (56.1)

0.192

 Platelet<100

36 (65.0)

46 (15.9)

0.286

 ALT >40

36 (21.4)

86 (30.9)*

0.029

 AST >40

54 (32.3)

109 (39.4)

0.137

 LDH >300

48 (35.6)

108 (42.7)

0.172

 CK>200

14 (10.4)

54 (21.3)**

0.007

 CRP>8

121 (79.1)

196 (75.1)

0.355

 ESR >20

67 (39.6)

98 (60.1)

0.420

Treatment on admission

 Antibiotics use

160 (94.7)

258 (89.3)*

0.048

21 (12.4)

33 (11.4)

0.747

 Oseltamivir

147 (87.0)

222 (76.8)**

0.008

 Traditional Chinese Medicine

28 (16.6)

64 (22.1)

0.151

 Glucocorticoids

64 (37.9)

134 (46.4)

0.077

Outcome

 Total In-hospital fatality

2 (1.2)

19 (6.6)**

0.008

  1. *, **. Boldface values indicate (*P <.05; **P <.01). Comparison of the 2017-2018 influenza season with control group (influenza season 2011-2017). WBC, white cell (×109/L); L%, lymphocyte percent; PLT, platelet (×109/L); ALT alanine aminotransferase (U/L), AST aspartate aminotransferase (U/L), LDH lactate dehydrogenase (U/L), CK creatine kinase (U/L), CRP C-reactive protein (mg/L), ESR erythrocyte sedimentation rate (mm/h). IQR interquartile range, NA not available