Table 1

 Reliability of PEF values: mean (SD) percentages of correct, incorrect, self-invented, and missing values for patients with controlled and uncontrolled asthma symptoms

Week 1Week 2Week 3Week 4
*Mean (SD) Asthma Control Questionnaire (ACQ) score 0.28 (0.15).
†Mean (SD) Asthma Control Questionnaire (ACQ) score 1.17 (0.56).
Correct, reported PEF values that were identical to memory values on the same day as % of expected entries; incorrect, reported PEF values that differed from memory values on the same day; self-invented, reported PEF values without a memory value on the same day; missing, expected entries where there was no PEF value reported.
Patients with controlled asthma symptoms (n = 25)*
Correct (%)93.1 (13.1)89.7 (14.6)81.1 (25.0)67.4 (30.2)
Incorrect (%)4.0 (9.7)8.0 (13.7)9.1 (15.4)16.0 (24.2)
Self-invented (%)0.0 (0.0)0.6 (2.9)2.9 (7.1)4.6 (9.0)
Missing (%)2.9 (7.1)1.7 (6.3)6.9 (14.9)12.0 (17.3)
Patients with uncontrolled asthma symptoms (n = 72)†
Correct (%)86.1 (18.4)82.1 (21.3)76.8 (24.4)69.2 (29.1)
Incorrect (%)7.5 (12.5)7.9 (13.3)9.3 (14.2)10.1 (12.3)
Self-invented (%)1.2 (5.7)1.2 (4.0)2.0 (5.5)4.0 (11.3)
Missing (%)5.2 (11.3)8.7 (15.5)11.9 (20.9)16.7 (26.5)