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Table 2 24-h ambulatory ECG and BP

From: Novel insights into the association between seasonal variations, blood pressure, and blood pressure variability in patients with new-onset essential hypertension

 

Spring (n = 93)

Summer (n = 72)

Autumn (n = 151)

Winter (n = 124)

t/Z/χ2

P

Mean daytime SBP (mmHg)

136.09 ± 14.67

136.04 ± 12.56

135.22 ± 12.86

138.09 ± 12.29

1.136

0.334

Mean daytime DBP (mmHg)

79.09 ± 11.44

79.43 ± 8.73

79.69 ± 9.77

82.55 ± 12.50

2.494

0.059

Mean daytime BP (mmHg)

100.09 ± 11.67

102.19 ± 10.72

100.93 ± 10.01

101.45 ± 10.97

0.580

0.628

Mean night SBP (mmHg)

129.47 ± 14.55

128.75 ± 15.46

129.58 ± 14.83

127.78 ± 15.70

0.375

0.711

Mean night DBP (mmHg)

73.94 ± 10.57

74.38 ± 10.72

75.21 ± 11.09

74.71 ± 10.79

0.287

0.835

Mean night BP (mmHg)

96.10 ± 13.14

95.31 ± 12.22

96.53 ± 14.35

96.20 ± 12.45

0.140

0.936

All-day average SBP

134.18 ± 15.90

135.42 ± 13.99

133.81 ± 13.83

134.68 ± 14.12

0.227

0.877

All-day SBP load

54.76 (29.73,76.19)

61.94 (38.16,80.00)

55.26 (34.48,79.41)

48.29 (21.89,71.79)

7.199

0.066

All-day average DBP

77.95 ± 10.49

80.17 ± 12.99

78.38 ± 10.42

79.65 ± 11.04

0.843

0.471

All-day DBP load

31.71 (6.65,53.58)

40.93 (22.92,67.68)

44.40 (21.21,64.71)

29.98 (14.63,54.04)

7.019

0.071

All-day average BP

99.23 ± 11.25

99.35 ± 11.67

99.77 ± 10.60

99.49 ± 13.42

0.047

0.986

All-day pulse pressure difference

56.77 ± 9.25

56.68 ± 10.35

55.52 ± 10.25

55.36 ± 10.22

0.498

0.684

24 h SBP standard deviation

14.69 ± 3.48

14.03 ± 3.78

14.38 ± 3.36

15.81 ± 3.06

5.781

0.001

24 h DBP standard deviation

11.68 ± 3.03

11.36 ± 2.45

11.39 ± 2.80

12.50 ± 2.67

4.388

0.005

24 h SBP coefficient of variation

0.11 ± 0.03

0.10 ± 0.03

0.11 ± 0.03

0.12 ± 0.03

4.998

0.002

24 h DBP coefficient of variation

0.15 ± 0.04

0.14 ± 0.03

0.15 ± 0.04

0.16 ± 0.04

3.072

0.028

Ambulatory arterial stiffness index

0.36 (0.24,0.48)

0.44 (0.26,0.55)

0.39 (0.23,0.53)

0.38 (0.26,0.54)

3.220

0.359

SDNN

129.31 ± 37.47

127.17 ± 34.16

130.27 ± 34.38

124.02 ± 32.32

0.822

0.482

SDANN

120.98 ± 58.91

111.29 ± 28.93

114.44 ± 31.78

110.45 ± 30.64

1.464

0.224

rMSSD

32.00 (21.94,47.88)

32.27 (22.03,50.51)

31.37 (24.54,45.19)

35.91 (25.79,52.11)

3.991

0.262

Pnn50

5.00 (1.75,10.93)

3.79 (2.11,8.90)

4.94 (2.07,11.31)

4.24 (2.01,10.02)

0.721

0.868

LF

2277.66

(1106.54,6613.00)

4556.99

(2319.30,9354.52)

2478.48

(1269.08,4790.46)

4458.33

(2659.93,9986.65)

33.653

 < 0.001

HF

1103.22

(420.44,3464.37)

2196.51

(1011.66,5451.20)

1079.45

(481.41,3041.69)

2458.46

(972.65,5476.29)

27.529

 < 0.001

LF/HF

2.06 (1.33,2.81)

2.07 (1.40,2.73)

2.09 (1.42,2.98)

1.98 (1.59,2.72)

0.895

0.827

Average heart rate (beats/min)

72.46 ± 10.91

75.79 ± 8.97

71.53 ± 8.93

75.38 ± 10.32

5.228

0.001

Mean daytime heart rate (beats/min)

77.04 ± 12.68

81.73 ± 11.41

76.61 ± 9.89

80.36 ± 11.28

4.775

0.003

Average night heart rate (beats/min)

66.03 ± 10.48

68.36 ± 8.42

66.17 ± 9.23

67.45 ± 9.75

1.130

0.337

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BMC Cardiovascular Disorders

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