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Table 3 Demographical and clinical characteristics of influenza A/H1N1 patients, influenza-like illness (ILI) patients, and healthy control subjects

From: Pandemic influenza A/H1N1 virus infection and TNF, LTA, IL1B, IL6, IL8, and CCLpolymorphisms in Mexican population: a case–control study

Characteristic

A/H1N1 patients

ILI patients

Healthy controls

p

 

(Total: 44)

(Total: 50)

(Total: 176)

 
 

n (%)

n (%)

n (%)

 

Sex

    

Male

30 (68.18)

29 (58.0)

67 (38.07)

 

Female

14 (31.82)

21 (42.0)

109 (61.93)

 

Age

    

<45

30 (68.18)

30 (60.0)

54 (30.68)

 

45-64

11 (25.00)

13 (26.0)

100 (56.82)

 

≥65

3 (6.82)

7 (14.0)

22 (12.50)

 

BMI ≥30

18 (40.91)

21 (42.0)

46 (26.42)

 

Mortality

15 (34.09)

2 (4.0)

 

<0.001*

P a O 2 <60 mm Hg (severe)

19 (43.18)

24 (48.0)

  

ICU

24 (54.55)

15 (30.0)

 

0.01*

Co-morbidities

    

Neurological disease

25 (56.82)

22 (44.0)

  

Asthma

2 (4.55)

6 (12.0)

  

Cancer

1 (2.27)

2 (4.0)

  

Hypertension

8 (18.18)

7 (14.0)

  

Smoking

21 (47.73)

29 (58.0)

  

Symptomatology

    

Fever (>38°C)

33 (75.00)

42 (84.0)

  

Cough

23 (52.27)

31 (62.0)

  

Nasal Congestion

5 (11.36)

2 (4.0)

  

Rhinorrhea

12 (27.27)

20 (40.0)

  

Dyspnea

33 (75.00)

35 (70.0)

  
  1. *When comparing A/H1N1 patients vs. ILI patients. BMI: Body mass index; PaO2: partial pressure of oxygen in arterial blood; ICU: Intensive Care Unit. Results were considered statistically significant when P was <0.05.