Table 4– Reference equations for total airways resistance (sRtot) and effective airways resistance (sReff) for children aged 3–10 yrs
sReff1.1426155-0.0001369×age3 -0.0337459×sexexp(-1.650597+0.003786×age2)0.08805
  • Age is given in decimal years; for sex, enter 1 for males and 2 for females. M: mu or median; S: sigma or coefficient of variation; L: lambda or skewness; exp: exponential.