Table 3. Baseline characteristics of group I.
| Characteristics | Single H1-antihistamine (N = 245) | Multiple H1-antihistamines(N = 209) | p value |
| Previous treatment history, no. (%) | 0.004 | ||
| No treatment | 103/240 (42.9) | 59/202 (29.2) | |
| H1-antihistamine | 116/240 (48.3) | 111/202 (55.0) | |
| H1-antihistamine+steroid | 21/240 (8.8) | 32/202 (15.8) | |
| Previous good response, no. (%) | |||
| H1-antihistamine | 105/115 (91.3) | 85/110 (77.3) | 0.004 |
| H1-antihistamine+steroid | 20/21 (95.2) | 27/32 (84.4) | 0.384 |
| UAS, mean (SD) | (N = 43) | (N = 41) | |
| 3.74 (1.73) | 4.05 (1.75) | 0.425 |