Table 2.
Summary of the improvement of Psoriasis Area and Severity Index (PASI) and visual analog scale (VAS) at week 8.
| The Hydrogen-water bathing group | The control group | P value | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Baseline PASI score | Baseline PASI score | |||||||||
| Mild | Moderate | Severe | Total | Mild | Moderate | Severe | Total | |||
| (N = 26) | (N = 11) | (N = 4) | (N = 41) | (N = 24) | (N = 9) | (N = 1) | (N = 34) | |||
| PASI (%) | >PASI90 | 1 (2.4) | 1 (2.4) | 0 | 2 (4.8) | 0 | 0 | 0 | 0 | >0.05 |
| >PASI75 | 5 (12.2) | 3 (7.3) | 2 (4.9) | 10 (24.4) | 1 (2.9) | 0 | 0 | 1 (2.9) | 0.022* | |
| >PASI50 | 13 (31.7) | 8 (19.5) | 2 (4.9) | 23 (56.1) | 4 (11.8) | 2 (5.9) | 0 | 6 (17.6) | 0.001 | |
| VAS improvement (%) | ≤−5 | 3 (7.3) | 0 (0) | 0.31* | ||||||
| ≤−3 | 9 (22.0) | 1 (2.9) | 0.04* | |||||||
| <0 | 21 (51.2) | 7 (20.6) | 0.006 | |||||||
| ≥0 | 20 (48.8) | 27 (79.4) | 0.006 | |||||||
*The corrected P (Pc) values were adjusted by using Yate’s correction for continuity.