Peak expiratory flow rate was measured in 318 Swedish children aged 4-16 years on Wright peak flow meter, Mini Wright peak flow meter and Vitalograph peak flow monitor. We found that height, age and sex had a significant effect on the regression equation. Weight and body surface area did not add any significant information. The curves for the Wright and Mini Wright peakflow meters are presented and may be used as normal references in the clinic. Mini Wright peakflow meter and Vitalograph peak flow monitor are cheap and handy but results on different instruments should not be directly compared.
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Wille et al. (1989) studied this question.
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