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Table 1 Characteristics of the subjects according to quartiles of peak oxygen uptake (n = 2,456).

From: The Inverse Association between Cardiorespiratory Fitness and C-Reactive Protein Is Mediated by Autonomic Function: A Possible Role of the Cholinergic Antiinflammatory Pathway

 

Q 1 (n = 604) <28 mL/kg/min

Q 2 (n = 639) 28.1–31.5

Q 3 (n = 595) 31.6–34.5

Q 4 (n = 618) >34.6

P values

Age (years)

60 ± 6a

57 ± 5

56 ± 4

55 ± 4

<0.001

BMI (kg/m2)

24.9 ± 2

24.8 ± 2

24.6 ± 2

24.3 ± 2

<0.001

Smoker (%)

27.0

20.2

19.5

20.7

0.005

Hypertension (%)

17.7

16.3

12.2

14.1

0.042

Antihypertensive drugs (%)

17.7

14.7

13.9

11.2

0.013

Diabetes (%)

9.4

6.6

8.9

3.6

<0.001

Oral hypoglycemic drugs (%)

9.9

6.0

6.9

2.4

<0.001

SBP (mmHg)

125.8 ± 20

124.2 ± 18

121.7 ± 18

121.8 ± 18

0.001

Diastolic blood pressure (DBP) (mmHg)

78.9 ± 12

78.6 ± 11

78.1 ± 11

78.1 ± 12

0.475

TC (mg/dL)

204.9 ± 38

205.5 ± 33

204.7 ± 33

203.3 ± 31

0.711

HDL-C (mg/dL)

47.2 ± 12

48.0 ± 10

50.6 ± 12

51.3 ± 12

<0.001

LDL-C (mg/dL)

139.3 ± 34

140.9 ± 32

140.3 ± 31

138.5 ± 30

0.546

TGs (mg/dL)

160.8 ± 80

161.7 ± 85

145.4 ± 74

143.6 ± 76

<0.001

TC/HDL-C ratio

4.5 ± 1.1

4.4 ± 1.0

4.2 ± 0.9

4.1 ± 0.9

<0.001

Glucose (mg/dL)

112.9 ± 32

107.9 ± 29

110.6 ± 36

103.8 ± 27

<0.001

CRP (mg/dL)b

0.12 (0.07–0.18)

0.10 (0.06–0.17)

0.09 (0.06–0.14)

0.08 (0.05–0.15)

<0.001

CRP (mg/dL)c

1.24 ± 0.4

1.18 ± 0.4

1.16 ± 0.4

1.06 ± 0.4

<0.001

RHR (bpm)

65 ± 9

64 ± 10

63 ± 9

61 ± 8

<0.001

HRR (bpm)

19 ± 9

23 ± 9

24 ± 8

26 ± 8

<0.001

RHR/HRR indexd

0.72 ± 0.17

0.62 ± 0.15

0.58 ± 0.14

0.52 ± 0.14

<0.001

  1. aData are mean ± SD.
  2. bMedian and interquartile range.
  3. cCRP, log transformed data due to skewed distribution.
  4. dRHR/HRR, ratio of resting heart rate/heart rate recovery 1 min.