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The following formula calculates the predicted PEFR for children pretty accurately
#410/
$CALC/Calculate expected PEFR/
$MATH/P/”P=495.9*H-381″/
$VAL/100/200/
$LTE/500/@2 339C/@2 Your ideal peak flow rate is |@litres per
minute./
$MID/500/@2 339C/@2 Your ideal peak flow rate is |@litres per
minute./
$GTE/500/@2 339C/@2 Your ideal peak flow rate is |@litres per
minute./
$NV/540//Unable to calculate your ideal peak flow rate today/
And this one does the same for adults
#440/ MEN Expected known
$CALC/Calculating Expected PEFR/
$MATH/P/”P=-30.15+(30.63*A)-(0.723*A^2)+(0.00521*A^3)+(146*H)”/
$VAL/200/300/
$LTE/500//@2 Your ideal peak flow rate is |@litres per
minute./
$MID/500//@2 Your ideal peak flow rate is |@litres per
minute./
$GTE/500//@2 Your ideal peak flow rate is |@litres per
minute./
$NV/540//Unable to calculate ideal peak flow rate today./
#445/ WOMEN Expected known
$CALC/Calculating Expected PEFR/
$MATH/P/”P=198.07+(3.07*A)-(0.0477*A^2)+(142*H)”/
$VAL/200/300/
$LTE/500//@2 Your ideal peak flow rate is |@ litres per
minute./
$MID/500//@2 Your ideal peak flow rate is |@ litres per
minute./
$GTE/500//@2 Your ideal peak flow rate is |@ litres per
minute./
$NV/540//Unable to calculate ideal peak flow rate today./
David Thornhill: endspan