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Table 1 Characteristics of participants by BP status in Zhejiang Province, China

From: Exploratory serum fatty acid patterns associated with blood pressure in community-dwelling middle-aged and elderly Chinese

Variables

Total subjects (n = 2447)

Hypertensive (n = 748)

Normotensive (n = 1699)

P a

Demographics, %b

Age,

   

< 0.01

 Middle-age (≤ 55 y)

49.11

53.59

47.13

 

 Elder (> 55 y)

50.89

46.41

52.87

 

 Females

52.88

51.87

53.33

0.48

Education levels

   

< 0.01

 Primary (< 9 years)

66.89

75.61

62.31

 

 Secondary (9–12 years)

27.86

21.41

31.25

 

 High (>12 years)

5.25

2.98

6.44

 

Profession

   

0.01

 Manual labor

38.66

34.24

40.64

 

 non-manual labor

61.34

65.76

59.36

 

Lifestyle factors, %b

    

Smoking habit

   

0.01

 Current smokers (≥ 18 pack/year)

24.28

20.94

25.75

 

 Former/never

75.72

79.06

74.25

 

Drinking habit

   

0.04

 Current (≥ 25 g/day)

26.86

25.13

28.62

 

 Former/never

73.14

74.87

71.38

 

Salt consumption

   

0.01

 High-salt (> 6 g/day)

25.72

29.21

24.18

 

 Moderate/low-salt

74.28

70.79

76.82

 

Exercise habit

   

< 0.01

 Regular (≥ 3 times/week)

23.85

20.76

28.95

 

 Irregular/never

76.15

79.24

71.05

 

Family history of hypertension, %b

 Yes

24.43

34.46

20.99

< 0.01

 No

75.57

65.54

79.01

 

Anthropometry indicators, mean (SD)c

 BMI (kg/m2)

23.80 (3.23)

24.93 (3.43)

23.44 (3.18)

< 0.01

 SBP (mm Hg)

126.42 (17.95)

137.10 (12.76)

119.44 (14.78)

< 0.01

 DBP (mm Hg)

81.22 (7.53)

86.28 (8.66)

79.70 (6.10)

< 0.01

 HR (beat/min)

71.00 (10.19)

72.88 (11.07)

70.53 (9.75)

< 0.01

Biochemical parameters, median (QR)d

 TG(mmol/L)

1.26 (0.88–1.86)

1.47 (1.01–2.08)

1.19 (0.83–1.73)

< 0.01

 TC (mmol/L)

4.59 (4.07–5.24)

4.73 (4.19–5.35)

4.54 (4.02–5.85)

< 0.01

 Fbg (mmol/L)

4.64 (4.29–5.08)

4.73 (4.36–5.22)

4.60 (4.24–5.00)

< 0.01

  1. SD standard deviation, BMI body mass index, SBP systolic blood pressure, DBP diastolic blood pressure, HR heart rate, QR quartile range, TG triglyceride, TC total cholesterol, Fbg fasting blood-glucose
  2. a P value for significance between hypertensive and normotensive group with Student’s unpaired ttest and chi-square test, respectively
  3. bCategorical data are presented as a percentage (%)
  4. cContinuous data with a normal distribution are presented as mean (standard deviation)
  5. dThe skewed data were expressed as the median (quartile range), and were log-transformed before statistic analyses