Table 2
Numbers of patients in each group with different numbers of exacerbations
Number of exacerbations
Zero
One
Two
Three
Four
Five
Pathogenic
0
0
1
3
1
1
Non-pathogenic
2
3
2
4
0
0
No organism
1
2
0
2
0
0
Total number
3
5
3
9
1
1