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Table 1 Anthropometric data and the respiratory function data of patients according to polysomnographic results

From: Receiver operating characteristics of impulse oscillometry parameters for predicting obstructive sleep apnea in preobese and obese snorers

 

snorers[A]

mild OSA[B]

OSAS[C]

p Value

p Value

p Value

(n = 84)

(n = 37)

(n = 93)

[A] vs. [B]

[A] vs. [C]

[B] vs. [C]

Age, years

44.5 ± 8.4

45.6 ± 9.1

46.3 ± 10.9

1.000

0.708

1.000

Height, cm

166.7 ± 8.6

165.4 ± 8.3

167.2 ± 9.0

1.000

1.000

0.863

Weight, kg

79.9 ± 10.7

83.3 ± 14.1

88.4 ± 15.5

0.606

<0.001*

0.162

BMI, kg/m2

28.9 ± 3.3

30.4 ± 4.1

31.5 ± 4.3

0.150

<0.001*

0.393

Sex, male/female

57/27

23/14

72/21

0.160

0.160

0.160

FVC, L

3.81 ± 0.68

3.62 ± 0.67

3.77 ± 0.89

0.664

1.000

1.000

FEV1, L

3.08 ± 0.59

2.94 ± 0.55

3.05 ± 0.73

0.847

1.000

1.000

FEV1/FVC, % predicted

101 ± 6.0

103 ± 6.5

102 ± 6.2

0.394

0.858

1.000

TLC, L

5.70 ± 0.92

5.50 ± 0.87

5.68 ± 1.02

0.887

1.000

0.989

RV, L

2.02 ± 0.43

2.00 ± 0.37

2.06 ± 0.42

1.000

1.000

1.000

IC, L

2.29 ± 0.60

2.32 ± 0.61

2.51 ± 0.65

1.000

0.057

0.369

ERV, L

1.38 ± 0.54

1.17 ± 0.58

1.11 ± 0.54

0.171

0.004*

1.000

FRC, L

3.41 ± 0.67

3.17 ± 0.71

3.16 ± 0.71

0.267

0.062

1.000

Rrs0 seated, Pa · s · L−1

0.44 ± 0.13

0.49 ± 0.13

0.53 ± 0.16

0.234

<0.001*

0.340

Rrs0 supine, kPa · s · L−1

0.58 ± 0.12

0.68 ± 0.11

0.76 ± 0.18

0.004*

<0.001*

0.025*

Grs seated, L · kPa−1 · s−1

2.46 ± 0.66

2.19 ± 0.60

2.03 ± 0.56

0.067

<0.001*

0.580

Grs supine, L · kPa−1 · s−1

1.78 ± 0.34

1.51 ± 0.28

1.40 ± 0.33

<0.001*

<0.001*

0.195

RDI, events/h

2.60 ± 1.60

9.91 ± 3.78

41.75 ± 21.10

0.009*

<0.001*

<0.001*

  1. Abbreviations: BMI body mass index, FVC forced vital capacity, FEV 1 forced expiratory volume in 1 s, FEV 1 /FVC, (% predicted) ratio of FEV1 to FVC, (percentages of predicted values), ERV expiratory reserve volume, FRC functional residual capacity, RV residual volume, TLC total lung capacity, IC inspiratory capacity, Rrs0 resistance at zero-frequency, is derived from linear-regression analysis of resistance vs frequency (over the 5 to 15Hz) and calculated for each subject in every condition according to the linear model (Fig. 2), Grs respiratory conductance at 0 Hz, the reciprocal of Rrs0, RDI respiratory disturbance index. The data are expressed as means ± standard deviation. Comparisons were made between groups using one-way ANOVA. p-values < 0.05 were considered statistically significant
  2. * Exist significant difference [A] Snorers group [B] Mild OSA group [C] OSAS group