Table 1 Comparison of basic characteristics between normotensive and hypertensive participants (n = 1013).

From: The association between circulating short-chain fatty acids and blood pressure in Chinese elderly population

Variables

Overall(1013)

Normal(311)

Hypertensive(702)

P-value

N(%) a / (Mean ± SD) b

N(%) / (Mean ± SD)

Age (years)

71.31 ± 6.34

70.75 ± 6.18

71.56 ± 6.40

0.060 d

60 ≤ age < 70

531(52.42)

171(54.98)

360(51.28)

0.277 e

 ≥ 70

482(47.58)

140(45.02)

342(48.72)

 

Sex

    

Male

449(44.32)

123(39.55)

326(46.44)

0.042 e

Female

564(55.68)

188(60.45)

376(53.56)

 

Education

    

Illiteracy

467(46.10)

151(48.55)

316(45.01)

0.702 e

Primary school

243(23.99)

70(22.51)

173(24.65)

 

Middle school

172(16.98)

49(15.76)

123(17.52)

 

High school and above

131(12.93)

41(13.18)

90(12.82)

 

Household income

    

 < 30,000yuan/year

603(59.52)

190(61.09)

413(58.83)

0.749 e

 ≥ 30,000yuan/year

323(31.89)

94(30.23)

229(32.62)

 

Others c

87(8.59)

27(8.68)

60(8.55)

 

BMI (kg/m2)

 

23.20 ± 3.47

24.60 ± 3.68

 < 0.001 d

 < 18.5

54(5.33)

23(7.40)

31(4.42)

 < 0.001 e

18.5 ≤ BMI < 24

442(43.63)

157(50.48)

285(40.60)

 

24 ≤ BMI < 28

367(36.23)

108(34.72)

259(36.89)

 

 ≥ 28.0

150(14.81)

23(7.40)

127(18.09)

 

Smoking Status

    

No

818(80.75)

245(78.78)

573(81.62)

0.289 e

Yes

195(19.25)

66(21.22)

129(18.38)

 

Alcohol Drinking Status

    

No

620(61.20)

196(63.02)

424(60.40)

0.429 e

Yes

393(38.80)

115(36.98)

278(39.60)

 

Serum SCFAs(ng/ml)

    

Acetic acid

2361.856 ± 2143.198

2454.440 ± 2191.991

2320.839 ± 2121.513

0.360 d

Propanoic acid

20.401 ± 11.694

19.940 ± 10.917

20.605 ± 12.025

0.404 d

Butyric acid

6.296 ± 4.086

6.207 ± 3.360

6.335 ± 4.371

0.647 d

Isobutyric acid

44.760 ± 50.086

41.956 ± 45.836

46.002 ± 51.841

0.236 d

Valeric acid

1.395 ± 1.580

1.496 ± 1.578

1.351 ± 1.580

0.176 d

Isovaleric acid

71.100 ± 65.585

67.893 ± 60.413

72.521 ± 67.743

0.300 d

Caproic acid

99.761 ± 64.767

96.836 ± 58.609

101.058 ± 67.314

0.339 d

Taking antihypertensive medication

278(27.44)

0

278(39.60)

 

Systolic blood pressure (mm Hg)

139.53 ± 20.83

122.38 ± 11.41

147.11 ± 19.52

 < 0.001 d

Diastolic blood pressure (mm Hg)

80.50 ± 10.70

75.09 ± 7.73

82.89 ± 10.96

 < 0.001 d

Diabetes

    

No

873(86.18)

276(31.62)

597(68.38)

0.115 e

Yes

140(13.82)

35(25.00)

105(75.00)

 
  1. Notes: a Number (detection frequency, %). b Mean ± one standard deviation for continuous variables. c Decline to answer. d Adopted t test. e Adopted Chi-square test.
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