Table 2.
Visible nail findings.
| Visible nail findings | PsO without joint involvement | PsA | AS | RA | Between PsO and PsA patients | Between AS vs RA patients P value |
Between 4 groups |
|---|---|---|---|---|---|---|---|
| P value | P value | ||||||
| Pitting, n (%) | 22 (88) | 20 (80) | 6 (24) | 4 (16) | .70 | .72 | < .001 |
| Onycholysis, n (%) | 22 (88) | 22 (88) | 3 (12) | 9 (36) | 1.0 | .09 | < .001 |
| Oil drop sign, n (%) | 15 (60) | 12 (48) | 0 | 0 | .39 | - | < .001 |
| Horizontal ridges, n (%) | 6 (24) | 9 (36) | 3 (12) | 2 (8) | .35 | 1.0 | .05 |
| Splinter hemorrhage, n (%) | 17 (68) | 18 (72) | 7 (28) | 4 (16) | .75 | .49 | < .001 |
| Leukonychia, n (%) | 14 (56) | 16 (64) | 14 (56) | 11 (44) | .56 | .57 | .56 |
| Nail plate crumbling, n (%) | 4 (16) | 3 (12) | 0 | 0 | 1.0 | - | .03 |
| Subungual hyperkeratosis, n (%) | 10 (40) | 17 (68) | 4 (16) | 3 (12) | .04 | 1.0 | < .001 |
| Red lunula, n (%) | 8 (32) | 8 (32) | 1 (4) | 2 (8) | 1.0 | 1.0 | .01 |
| Vertical ridges-trachyonychia, n (%) | 12 (48) | 11 (44) | 6 (24) | 12 (48) | .77 | .14 | .25 |
Numerical data are expressed as the mean ± SD or median (range). Categorical data are expressed as the frequency (percentage).
AS = ankylosing spondylitis, n = number of patients, PsA = psoriatic arthritis, PsO = psoriasis, RA = rheumatoid arthritis, SD = standard deviation.