Table 2 Reproducibility of infant lung function measures
MeasureWithin test CV#1 month between test ICC#
RVRTC FEVt3.4–4.1%0.93
RVRTC FEF7.8–8.9%0.85
FRCpleth2.3%0.93

  • #: Values are expressed as coefficients of variation (CV), the extent of variability in relation to the mean of the population; and intraclass correlation coefficient (ICC), the level of agreement between tests; : FEVt: forced expired volume in t seconds, where t = 0.5, 0.75 or 1 second. FEF: forced expiratory flow; FRCpleth: plethysmographic functional residual capacity. Data are summarised from [15].