Table 1

Interobserver variability

ObserversnMean±sd difference between observers (kPa·L−1·s)95% limits of agreement between observers
Pair 148−0.007±0.07−0.15–+0.14
Pair 219−0.021±0.09−0.25–+0.23
Klug et al. 1220.02±0.31−0.66–+0.61
  • n: pairs of measurements. Mean age of children in pairs 1 & 2 = 3.9 yr, Klug et al. = 4.8 yr.