Clinical characteristics

n

%

The onset of symptoms

≤12 months

>12 months/≤60 months

>60 months/≤120 months

>120 months

38

37

10

15

38%

37%

10%

15%

Symptoms

Heartburn + regurgitation

Epigastric pain

Chronic cough

Expiratory dyspnea

Dysphagia

75

15

5

4

3

75%

15%

5%

4%

3%

Rhythm

Diurnal

Nocturnal

Mixte

31

20

49

31%

20%

49%

Frequency

Daily

>3 days/week

>1 days/week

<3 days/month

24

39

29

8

24%

39%

29%

8%

Upper endoscopy (n = 20)

Normal

Peptic esophagitis

Hiatal hernia

Barrett’s esophagus

9

5

5

1

45%

25%

25%

5%