Table 2

Numbers and percentage of excluded subjects by exclusion criteria and number of acceptable tests

Exclusion criteria and acceptable test
N
%

Curves with a sub-maximal expiratory effort
56
6.1
Only 1 acceptable manoeuvre
4
0.4
Early interruption
100
10.9
Expiration time < 0.5 sec
7
0.8

Total excluded subjects
149
16.3
Subjects with acceptable tests
766
83.7

Piccioni et al. Respiratory Research 2007 8:14   doi:10.1186/1465-9921-8-14