Table 1 Patient characteristics

Number (% of enrolled)

N =50

N =32 (64)

N =18 (36)

N =30 (60)

N =20 (40)

Age, y

49.5

± 16.2

55.2

± 13.1

39.5

± 16.7

0.001

54.0

± 14.0

42.8

± 17.3

0.015

Female sex, (%)

31

(62)

16

(50)

15

(83)

0.020

17

(57)

14

(70)

0.341

African American, (%)

28

(56)

17

(53)

11

(61)

0.426

18

(60)

10

(50)

0.459

Caucasian, (%)

20

(40)

14

(44)

6

(33)

0.426

11

(37)

9

(45)

0.459

Asian, (%)

1

(2)

0

(0)

1

(6)

0.426

0

(0)

1

(5)

0.459

Weight (kg)

84.8

± 26.3

89.4

± 27.7

76.8

± 22.1

0.105

87.5

± 25.7

80.9

± 27.4

0.393

Height (in)

65.7

± 4.4

66.3

± 4.7

64.7

± 3.6

0.195

66.3

± 4.7

65.0

± 3.7

0.300

Patient History

 CAD, (%)

1

(2)

1

(3)

0

(0)

0.449

0

(0)

1

(5)

0.216

 Cancer, (%)

14

(28)

12

(38)

2

(11)

0.046

11

(37)

3

(15)

0.095

 CHF, (%)

2

(4)

1

(3)

1

(6)

0.674

1

(3)

1

(5)

0.768

 COPD, (%)

8

(16)

7

(22)

1

(6)

0.131

6

(20)

2

(10)

0.345

 Diabetes mellitus, (%)

10

(20)

7

(22)

3

(17)

0.659

6

(20)

4

(20)

1.000

 HIV, (%)

3

(6)

3

(9)

0

(0)

0.180

3

(10)

0

(0)

0.145

 Lupus, (%)

1

(2)

1

(3)

0

(0)

0.449

1

(3)

0

(0)

0.409

 Smoking history, (%)

3

(6)

2

(6)

1

(6)

0.921

2

(7)

1

(5)

0.808

 Surgery in past month, (%)

3

(6)

3

(9)

0

(0)

0.180

3

(10)

0

(0)

0.145

 Transplant, (%)

4

(8)

3

(9)

1

(6)

0.633

2

(7)

2

(10)

0.670