Table 1—

Study demographics and respiratory heat exchange data

Healthy controlStable asthma
Age yrs41.6±13.144.7±14.6
Subjects n1823
Sex F/M10/817/6
Height m1.68±0.071.65±0.08
FEV1 % pred101.8±7.582.7±26.9**
Enthalpy of inspirate J·g−120.3±1.621.9±1.6
Minute ventilation L·min−116.1±2.315.9±3.4
RHML J·L−191.9±4.598.1±7.3**
  • Data are presented as mean±sd or n. F: female; M: male: FEV1: forced expiratory volume in one second; % pred: % predicted; RHML: respiratory health and moisture loss. **: p<0.01.