Table 3 Comparison of temporal and spatial variability of the ventilation during a free condition or a cognitive task between the hEDS and the control groups.

From: Impairment of lung volume perception and breathing control in hypermobile Ehlers-Danlos syndrome

 

Free condition

Cognitive task

hEDS

Control

hEDS

Control

Spatial

    VT (mL)

647 ± 217

756 ± 222

708 ± 231

729 ± 215

    VT,SD (mL)

98 ± 83

99 ± 45

195 ± 107

124 ± 50*

    CoefVar_V

0.147 ± 0.069

0.140 ± 0.078

0.278 ± 0.128

0.168 ± 0.071**

Temporal

    fB (#.min−1)

14.7 ± 4.7

11.6 ± 4.1*

13.4 ± 5.2

13.6 ± 4.4

    PPSD (ms)

412 ± 180

495 ± 396

1332 ± 1054

697 ± 451*

    CoefVar_t

0.093 ± 0.033

0.090 ± 0.066

0.243 ± 0.101

0.145 ± 0.096**

    RMSSD (ms)

4592 ± 1587

5768 ± 1992

5290 ± 2359

4980 ± 1813

 V̇E (mL min−1)

8803 ± 2119

8222 ± 1894

8562 ± 2131

9317 ± 2328

  1. Data are presented as mean ± SD.
  2. CoefVar_t coefficient of variability for temporal domain, CoefVar_V coefficient of variability for spatial domain, hEDS hypermobile Ehlers-Danlos syndrome, PPSD standard deviation of the time interval between each inspiratory peak, RMSSD root mean square of the time interval between each inspiratory peak, fB breathing frequency, IV inspired volume, IVSD standard deviation of the inspired volume, V̇E minute ventilation, VT tidal volume.
  3. Significant differences with the hEDS group: *P < 0.05; **P < 0.01.
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