Work out peak expiratory flow predicted instantly with clear inputs, formula shown and shareable results.
Applies the Nunn and Gregg regression equations for adult peak expiratory flow and shows the 80% and 50% action thresholds used in asthma plans.
Nunn and Gregg (1989)
Men: ln PEF = 0.544 ln(age) - 0.0151 age - 74.7/height(cm) + 5.48. Women: ln PEF = 0.376 ln(age) - 0.0120 age - 58.8/height(cm) + 5.63
Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.
Personal-best asthma action plans commonly use 80% and 50% of predicted or best flow as the amber and red zones.
No. Paediatric prediction uses height-based equations rather than the adult regression.