The physiological characteristics of cough in patients with chronic cough
| MVC | IC | SC | ANOVA p-value | IC vs SC p-value | |
|---|---|---|---|---|---|
| Type of cough effortEfforts occurring in bouts (%) | N/A | 91±14 | 82±19 | N/A | 0.04* |
| ERs (% of all efforts) | 0 | 67±14 | 61±19 | N/A | 0.40 |
| ER was 1st effort in bout (%) | N/A | 25±28 | 27±22 | N/A | 0.49 |
| Cough intensity | |||||
| Poes (cmH2O) | 179±45 | 112±61 | 128±28 | <0.001* | 0.42 |
| Pgas (cmH2O) | 194±59 | 116±68 | 141±43 | <0.001* | 0.36 |
| EMGabd | 0.14±0.11 | 0.09±0.07 | 0.07±0.07 | 0.05 | 0.57 |
| PCFR:PEFRp ratio | 1.52±0.38 | 0.38±0.12 | 0.82±0.32 | <0.001* | <0.001* |
Data presented as mean±SD MVC: maximum voluntary cough; IC: induced cough; SC: spontaneous cough; ER: expiratory reflex; Poes: oesophageal pressure; Pga: gastric pressure; EMGabd: peak abdominal electromyographic activity; PCFR: peak cough flow rate; PEFRp: predicted peak expiratory flow rate.