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Table 1 Characteristics of the participants according to tertiles of serum adiponectin levels

From: The association between circulating adiponectin levels, lung function and adiposity in subjects from the general population; data from the Akershus Sleep Apnea Project

  

ADPN tertiles

 

Variables

Total

Tertile 1

Tertile 2

Tertile 3

p

n = 529

n = 176

n = 176

n = 177

ADPN, mg/Ld

7.6 (5.4, 10,4)

4.6 (3.8, 5.4)

7.6 (6.7, 8.3)

12.6 (10.3, 15.4)

N/A

Age, years

48.6 (11.3)

46.4 (11.2)

48.6 (10.9)

50.7(11.0)

0.002a

Female gender

240 (45.4)

40 (22.7)

74 (42.0)

126 (71.2)

< 0.001b

Height, cm

173 (9)

176 (8)

174 (9)

170 (8)

< 0.001a

Smoking status

    

0.860b

 Current smokers

138 (26.8)

45 (25.9)

50 (29.1)

43 (25.4)

 

 Previous smokers

184 (35.7)

64 (36.8)

62 (36.0)

58 (31.5)

 

 Never smokers

193 (37.5)

65 (37.4)

60 (34.9)

68 (40.2)

 

Weight, kg

86.7 (17.3)

94.2 (15.4)

88.3 (17.2)

77.6 (15.2)

< 0.001a

BMI, kg/m2

28.9 (4.98)

30.5 (4.6)

29.2 (5.0)

26.9 (4.6)

< 0.001a

WHR

0.94 (0.1)

0.99 (0.08)

0.95 (0.09)

0.88 (0.09)

< 0.001a

Metabolic syndrome

174 (32.9)

89 (50.6)

58 (33.0)

27 (15.5)

< 0.001b

OSA

293 (55.6)

71 (30.3)

75 (32.1)

88 (37.6)

0.167b

CRP, mg/Ld

1.26 (0.65, 2.94)

1.48 (0.78, 3.20)

1.44 (0.69, 3.28)

0.92 (0.50, 2.09)

0.001c

FEV1

3.41 (0.88)

3.64 (0.89)

3.51 (0.93)

3.09 (0.77)

< 0.001c

FVC

4.15 (1.03)

4.37 (0.99)

4.27 (1.08)

3.81 (0.93)

< 0.001c

FEV1, % of predicted

103.25 (16.11)

101.19 (16.11)

104.45 (16.66)

104.09 (15.44)

0.115a

FVC, % of predicted

103.96 (16.33)

99.52 (15.78)

104.79 (16.22)

107.53 (16.05)

< 0.001a

  1. ADPN adiponectin, FEV 1 forced expiratory volume during 1st second, FVC forced vital capacity, BMI body mass index, WHR waist-hip ratio, OSA obstructive sleep apnoea, CRP C-reactive protein
  2. aanalyses of variance, bchi-square tests, cKruskal-Wallis
  3. Continuous variables are expressed as mean (standard deviation) or dmedian (interquartile range) and categorical variables are expressed as number (%). Metabolic syndrome is defined according to the National Cholesterol Education Program criteria. OSA, Obstructive Sleep apnoea is defined as apnoea-hypopnoea index ≥5