Change in threshold antigen concentration to induce a positive CPT
| Treatment group | |||
|---|---|---|---|
| Placebo (n = 20) | Levocabastine (n = 20) | Mequitazine (n = 20) | |
| Kruskal-Wallis, overall p = 0.0310; mequitazine v placebo p = 0.01, v levocabastine p = 0.10; levocabastine v placebo p = 0.35. | |||
| Positive reaction at: | |||
| Threshold dose | 12 | 9 | 4 |
| 1 level above | 5 | 7 | 7 |
| 2 levels above | 2 | 1 | 7 |
| >2 levels above | 1 | 3 | 2 |