Table 1 Comparison of clinical characteristics among participants according to GERD in study participants.

From: Association between wet-bulb globe temperature with gastroesophageal reflux disease in different geographic regions in a large Taiwanese population study

Characteristics

GERD (-)

(n = 103,956)

GERD (+)

(n = 16,468)

p

Age (year)

49.6 ± 11.0

51.9 ± 10.4

< 0.001

Male sex (%)

36.2

34.1

< 0.001

DM (%)

9.4

10.5

< 0.001

Hypertension (%)

24.1

26.5

< 0.001

Smoking history (%)

26.9

29.3

< 0.001

Alcohol history (%)

8.3

9.7

< 0.001

Systolic BP (mmHg)

120.4 ± 18.8

120.6 ± 17.8

0.111

Diastolic BP (mmHg)

73.8 ± 11.5

73.8 ± 10.9

0.650

BMI (kg/m2)

24.2 ± 3.8

24.2 ± 3.8

0.310

Laboratory parameters

Fasting glucose (mg/dL)

95.8 ± 20.8

96.4 ± 19.8

0.002

Hemoglobin (g/dL)

13.8 ± 1.6

13.8 ± 1.5

0.128

Triglyceride (mg/dL)

115.1 ± 94.3

118.9 ± 92.4

< 0.001

Total cholesterol (mg/dL)

195.4 ± 35.9

197.3 ± 35.2

< 0.001

eGFR (mL/min/1.73 m2)

105.5 ± 13.9

103.8 ± 13.8

< 0.001

Uric acid (mg/dL)

5.43 ± 1.43

5.39 ± 1.39

0.002

Residence

  

< 0.001

Northern Taiwan (%)

32.9

36.2

 

Central Taiwan (%)

19.1

19.9

 

Southern Taiwan (%)

38.7

33.0

 

Eastern Taiwan (%)

9.3

10.9

 

WBGT during noon period*

1-year average of WBGT (per 1 ℃)

27.26 ± 1.08

27.22 ± 1.10

< 0.001

3-year average of WBGT (per 1 ℃)

27.11 ± 1.10

27.08 ± 1.12

0.001

5-year average of WBGT (per 1 ℃)

26.97 ± 1.10

26.94 ± 1.12

0.002

WBGT during work period*

1-year average of WBGT (per 1 ℃)

25.02 ± 1.16

24.99 ± 1.19

< 0.001

3-year average of WBGT (per 1 ℃)

24.93 ± 1.16

24.90 ± 1.18

< 0.001

5-year average of WBGT (per 1 ℃)

24.80 ± 1.15

24.77 ± 1.18

< 0.001

  1. *Noon period is defined as 11 am to 2 pm, and work period is defined as 8 am to 5 pm.
  2. Abbreviations. GERD, gastroesophageal reflux disease; DM, diabetes mellitus; BP, blood pressure; BMI, body mass index; eGFR, estimated glomerular filtration rate; WBGT, wet-bulb globe temperature.