Table 3

Prediction equations based on measurements from the healthy infants

PredictionResidualR2
RR min−161.72–0.13 (age weeks)–0.32 (length cm)5.610.40
TPTEF:TE0.461–0.003 (length cm)0.0700.079
FEV0.4 mL−304+7.53 (length cm)+18.38 (female)41.40.64
  • RR: respiratory rate

  • TPTEF:TE: tidal breathing ratio

  • FEV0.4: forced expiratory volume in 0.4 seconds