Table 3– Maximum voluntary cough
StrokeControlMean δ (95% CI)p-value
Subjects n1620
PCFR L·min−1287±171497±122-210 (-314– -106)<0.001
PCFR % pred PEFR70±43102±19-32 (-55– -10)0.005
Cough VE mL1170±7552100±864-930 (-1541– -319)0.004
Cough VE % pred FVC33±2147±16-14 (-28– -1)0.041
PIFR# L·min−1112 (80–164)213 (157–256)-88 (-136– -42)<0.001
Cough VI mL1519±5462710±818-1191 (-1773– -609)0.003
Cough VI % pred FVC43±2162±18-19 (-34– -3)0.020
Cough Pga cmH2O98.5±61.6208.5±61.3-110.0 (-152.4– -67.6)<0.001
Cough pressure acceleration cmH2O·s−1583±512927±303-344 (-644– -45)0.026
Compression time ms212±105261±127-49 (-138– -40)0.265
Cough volume acceleration L·s−283±57200±70118 (-165– -70)<0.001
  • Data are presented as mean±sd, unless otherwise stated. p-values obtained from unpaired t-tests. δ: difference; PCFR: peak cough flow rate; % pred: % predicted; PEFR: peak expiratory flow rate; VE: expiratory volume; FVC: forced vital capacity; PIFR: peak inspiratory flow rate; VI: inspiratory volume; Pga: gastric pressue. #: data are skewed and are presented as median (interquartile range) and median difference (95% CI), and p-values are from the Mann–Whitney U-test.