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Table 2 Correlation between the parameters of small airway function and the parameters of large airway function in the two groups

From: Effect of small airway dysfunction on large airway function parameters in elderly adults

Variables

Observation group

Control group

MEF50

MEF25

MMEF

MEF50

MEF25

MMEF

SVC

0.430***

0.433***

0.541***

0.581***

0.350***

0.569***

FVC

0.458***

0.479***

0.601***

0.597***

0.346***

0.576***

FEV1

0.563***

0.560***

0.696***

0.651***

0.459***

0.672***

FEV1/FVC

0.143

0.046

0.024

-0.147

0.227*

0.026

PEF

0.411***

0.421***

0.508***

0.490***

0.280**

0.493***

MEF75

0.613***

0.369***

0.573***

0.634***

0.322***

0.613***

  1. SVC: slow vital capacity; FVC: forced vital capacity; FEV1: forced expiratory volume in 1 s; PEF: peak flow; MEF75, MEF50, and MEF25: maximal flows at 75%, 50% and 25% of remaining forced vital capacity; MMEF: maximum mid-expiratory flow.
  2. *P < 0.05; **P < 0.01; ***P < 0.001