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Table 1 Baseline characteristics of study cohort across three QRS groups

From: Systolic blood pressure but not electrocardiogram QRS duration is associated with heart rate variability (HRV): a cross-sectional study in rural Australian non-diabetics

 

QRS duration (ms)

p-value

80–100 (n = 115)

>100–120 (n = 69)

>120 (n = 16)

 

n

%

n

%

n

%

Age (years), mean (SD)

65.5 (11.2)

 

67.4 (10.1)

 

72.7 (6.8)

 

0.032

Gender

      

0.002

 Female

82

71.3

31

44.9

9

56.3

 

 Male

33

28.7

38

55.1

7

43.8

 

BMI

27 (5.2)

 

28.4 (4.4)

 

26.3 (2.3)

 

0.091

Hypertension

44

38.3

40

58

10

62.5

0.015

Cardiovascular

17

14.8

12

17.4

4

25

0.57

Smoking

2

1.7

1

1.5

0

 

0.87

Alcohol

5

4.4

5

7.3

1

6.3

0.70

Exercise

6.7 (3.4)

 

6.5 (3.3)

 

7.5 (3.3)

 

0.61

SBP

127.1 (17.7)

 

131.1 (15.7)

 

127.2 (16.2)

 

0.30

DBP

75.4 (8.1)

 

76.8 (8.2)

 

76.7 (6.8)

 

0.50

Total cholesterol

5.3 (1.1)

 

5.3 (1.0)

 

5.1 (0.9)

 

0.87

LDL

3.1 (1.0)

 

3.2 (0.8)

 

3.0 (0.9)

 

0.86

HDL

1.6 (0.5)

 

1.6 (0.5)

 

1.5 (0.3)

 

0.53

Triglycerides

1.2 (0.7)

 

1.1 (0.5)

 

1.4 (0.5)

 

0.38

Creatinine

67 (15.8)

 

71.6 (19.9)

 

65.6 (14.5)

 

0.20

  1. SD standard deviation, BMI body mass index, SBP systolic blood pressure, DBP diastolic blood pressure, LDL low density lipoprotein, HDL high density lipoprotein
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Clinical Hypertension

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