Table 4—

Correlations between EMGdi % max and (VT % VCpred)/(EMGdi % max) and % predicted FEV1, VC and IC

FEV1 % predVC % predIC % pred
r2p-valuer2p-valuer2p-value
EMGdi % max0.40<0.0010.61<0.0010.280.02
(VT % VCpred)/(EMGdi % max)0.250.0050.48<0.0010.360.006
  • EMGdi: diaphragm electromyogram; % max: % maximum; VT: tidal volume; VC: vital capacity; % VCpred: percentage of predicted VC; FEV1: forced expiratory volume in one second; IC: inspiratory capacity; % pred: % predicted.