Table 3—

Mean baseline respiratory function and between test repeatability

Rrs6Rrs8Rrs10Xrs6Xrs8Xrs10
Baseline respiratory function hPa·s·L−111.39±2.1410.82±1.939.81±1.71-5.17±1.39-4.24±1.24-4.16±1.22
z-score#1.28±1.07***1.28±1.05***1.03±1.03***-1.41±1.10***-1.26±1.17***-1.00±1.11***
Within-test variation %6.7±2.95.6±2.55.6±2.614.3±7.514.3±7.212.2±5.6
Between-test repeatability
 Absolute mean difference hPa·s·L−1-0.24±1.28-0.25±1.25-0.75±2.200.10±1.070.08±1.030.24±1.26
 z-score mean difference#-0.12±0.89-0.14±0.72-0.24±0.600.08±0.890.07±1.000.07±0.85
  • Data are expressed as mean±sd. Rrs6, Rrs8, Rrs10: respiratory system resistance at 6, 8 and 10 Hz, respectively; Xrs6, Xrs8, Xrs10: respiratory system reactance at 6, 8 and 10 Hz, respectively. #: expressed in standardised sd units. ***: p<0.001 for comparison with reference group 17.