TY - JOUR T1 - Reliability of PEF diaries JF - Thorax JO - Thorax SP - 742 LP - 742 DO - 10.1136/thx.56.9.742 VL - 56 IS - 9 AU - W ANEES AU - V HUGGINS AU - P S BURGE Y1 - 2001/09/01 UR - http://thorax.bmj.com/content/56/9/742.1.abstract N2 - The paper by Kamps et al reported that peak expiratory flow (PEF) diaries kept by asthmatic children were unreliable.1 They found that about 25% of readings recorded by an electronic meter were not identical to those written in the diary. The Vitalograph 2110 meter was used for this study with subjects recording the best of three blows on each occasion. However, the 2110 meter does not necessarily record the highest value indicated. Rather, it records the highest value for good quality blows in preference to poor quality blows, even if the poor blow is a higher value. A good quality blow is one in which PEF is achieved between 40 … ER -