Skip to main content

Table 1 Clinical characteristics according to quartiles of year 15 serum adiponectin concentrations; CARDIA "calendar years".

From: Serum adiponectin is positively associated with lung function in young adults, independent of obesity: The CARDIA study

Year 15 adiponectin quartiles (Q)

Q1 (n = 565)

Q2 (n = 449)

Q3 (n = 519)

Q4 (n = 523)

p value

Age (years)

40.2 (3.7)

40.2 (3.6)

40.2 (3.6)

40.5 (3.5)

0.51

Race (% blacks)

62

46

36

27

<0.001

Sex (% men)

70

53

41

22

<0.001

Education level (completed high school or lower) (%)

26

20

17

17

<0.001

Smoking Status

    

0.003

Never smoker, %

65

65

65

64

 

Former smoker, %

14

14

19

21

 

Current smoker, %

21

20

16

15

 

Body Mass Index (kg/m2)

31.0 (6.1)

29.5 (6.9)

27.9 (6.2)

25.3 (5.2)

<0.001

Physical Activity score (exercise units)

355 (301)

347 (288)

352 (286)

369 (275)

0.66

Serum C-reactive protein (g/ml)

3.9 (5.1)

3.0 (3.8)

2.8 (6.0)

1.9 (3.2)

<0.001

ln (Homeostasis Model Assessment, HOMA units)

1.5 (0.5)

1.3 (0.4)

1.2 (0.4)

1.1 (0.4)

<0.001

FVC at year 10 (ml)

4464 (1027)

4395 (1064)

4381 (1046)

4204 (942)

<0.001

FEV1 at year 10 (ml)

3568 (775)

3507 (813)

3510 (793)

3371 (696)

<0.001

FEV1/FVC at year 10 (%)

80.4 (5.5)

80.3 (5.7)

80.5 (5.5)

80.7 (6.1)

0.65

  1. Note 1: All variables were measured at year 15 except Forced vital capacity (FVC), Forced Expiratory Volume in 1 second (FEV1) and FEV1/FVC that were measured at year 10 and are expressed as mean (standard deviation) or percent.
  2. Note 2: Quartile cutpoints for serum adiponectin concentrations are ≤6.99, 7.00-9.59, 9.60-14.39, and ≥ 14.40 mg/l.
Back to article page

Respiratory Research

ISSN: 1465-993X

Contact us