Table 3.
Cluster analysis of psychophysical functions (Fig. 3) split according to age, sex, diagnosis.
| Scale rating cluster | N | male | <13 yr | Asthma | CF | Control |
|---|---|---|---|---|---|---|
| Dalhousie-leg exertion | ||||||
| cluster 1 | 5 | 4 | 1 | 2 | 2 | 1 |
| cluster 2 | 7 | 5 | 1 | 4 | 2 | 1 |
| cluster 3 | 7 | 3 | 4 | 4 | 1 | 2 |
| cluster 4 | 5 | 3 | 4 | 4 | 1 | 0 |
| cluster 5 | 6 | 5 | 3 | 1 | 3 | 2 |
| cluster 6 | 8 | 5 | 2 | 1 | 3 | 4 |
| cluster 7 | 5 | 2 | 3 | 1 | 2 | 2 |
| cluster 8 | 15 | 7 | 6 | 3 | 5 | 7 |
| cluster 9 | 21 | 12 | 13 | 6 | 2 | 13 |
| Borg-exertion | ||||||
| cluster 1 | 17 | 9 | 6 | 4 | 6 | 7 |
| cluster 2 | 9 | 4 | 3 | 2 | 3 | 4 |
| cluster 3 | 1 | 1 | 0 | 0 | 1 | 0 |
| cluster 4 | 8 | 5 | 4 | 5 | 1 | 2 |
| cluster 5 | 17 | 11 | 11 | 5 | 2 | 10 |
| cluster 6 | 6 | 3 | 1 | 3 | 1 | 2 |
| cluster 7 | 6 | 4 | 4 | 1 | 2 | 3 |
| cluster 8 | 10 | 6 | 8 | 5 | 1 | 4 |
| cluster 9 | 5 | 3 | 0 | 1 | 4 | 0 |
| Dalhousie-breath effort | ||||||
| cluster 1 | 4 | 2 | 2 | 2 | 0 | 2 |
| cluster 2 | 10 | 3 | 3 | 5 | 2 | 3 |
| cluster 3 | 5 | 4 | 2 | 1 | 2 | 2 |
| cluster 4 | 15 | 10 | 8 | 2 | 6 | 7 |
| cluster 5 | 7 | 4 | 1 | 2 | 1 | 4 |
| cluster 6 | 7 | 4 | 2 | 2 | 2 | 3 |
| cluster 7 | 8 | 7 | 5 | 3 | 2 | 3 |
| cluster 8 | 10 | 6 | 7 | 7 | 1 | 2 |
| cluster 9 | 13 | 6 | 7 | 2 | 5 | 6 |
| Borg-dyspnea | ||||||
| cluster 1 | 6 | 3 | 2 | 3 | 2 | 1 |
| cluster 2 | 10 | 8 | 7 | 6 | 2 | 2 |
| cluster 3 | 4 | 2 | 1 | 2 | 0 | 2 |
| cluster 4 | 4 | 3 | 3 | 1 | 0 | 3 |
| cluster 5 | 10 | 5 | 5 | 0 | 5 | 5 |
| cluster 6 | 4 | 3 | 1 | 1 | 2 | 1 |
| cluster 7 | 10 | 6 | 2 | 3 | 3 | 4 |
| cluster 8 | 18 | 10 | 13 | 6 | 2 | 10 |
| cluster 9 | 13 | 6 | 3 | 4 | 5 | 4 |