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Table 4 Correlation between maximum inspiratory pressures (MIP, absolute values) or maximum expiratory pressure (MEP, absolute value) and pulmonary function variables (inspiratory capacity: IC, slow vital capacity: SVC, forced vital capacity: FVC, forced expiratory volume in 1 second: FEV 1 , peak expiratory flow: PEF, maximum voluntary ventilation: MVV, percentage predicted values) in Huntington’s disease (HD) and healthy volunteers (Control)

From: Pulmonary function in patients with Huntington’s Disease

  

IC (% predicted)

SVC (% predicted)

FVC (% predicted)

FEV1(% predicted)

PEF (% predicted)

MVV (% predicted)

MIP (cm H2O)

HD

r

0.26

0.40

0.75

0.68

0.69

0.56

p

0.293

0.091

0.000

0.001

0.001

0.014

Control

r

0.20

0.14

0.14

0.21

0.16

0.17

p

0.410

0.577

0.558

0.402

0.509

0.479

MEP (cm H2O)

HD

r

0.18

0.51

0.67

0.64

0.38

0.50

p

0.461

0.028

0.002

0.003

0.113

0.032

Control

r

0.20

0.34

0.27

0.12

0.22

-0.04

  

p

0.423

0.158

0.262

0.629

0.373

0.848

  1. r values of a Pearson correlation coefficient and p values are shown.