Table 1

Results of peak flow measurements

Subject	Mean of 5 standard attempts	Mean of 5 manipulated attempts	Relative increase (%)	Best of 5 standard attempts	Best of 5 manipulated attempts	Relative increase (%)
1	509	688	35	520	800^1-150	54
2	500	634	27	520	660	27
3	613	710	16	625	800^1-150	28
4	516	712	38	590	800^1-150	36
5	490	512	4	510	540	6
6	526	730	39	530	800^1-150	51
7	628	760	21	640	800^1-150	25
8	548	537	−2	575	550	−4
9	414	688	66	420	780	86
10	439	602	37	450	800^1-150	78
11	402	432	7	410	480	17
12	522	650	24	540	800^1-150	48
13	468	616	32	480	750	56
14	432	594	37	440	800^1-150	82
15	294	408	39	350	440	26

↵1-150 These subjects produced several peak flow measurements beyond 800 (top of the scale) which were recorded as 800 for the purpose of calculating the mean recording and relative increase.