Table 3.
Relationship between serum IL-6 and clinical and laboratory parameters
| Parameter | Psoriasis alone | Psoriasis + PsA | ||
|---|---|---|---|---|
| RS | P-value | RS | P-value | |
| Total cholesterol [mg/dl] | 0.33 | < 0.05 | 0.11 | 0.5958 |
| HDL-cholesterol [mg/dl] | –0.09 | 0.5377 | 0.20 | 0.3391 |
| LDL-cholesterol [mg/dl] | 0.41 | < 0.01 | –0.08 | 0.6816 |
| VLDL-cholesterol [mg/dl] | –0.02 | 0.8766 | –0.20 | 0.3335 |
| Triglycerides [mg/dl] | 0.10 | 0.5065 | –0.23 | 0.2559 |
| Castelli index | 0.30 | < 0.05 | 0.03 | 0.8709 |
| LDL : HDL ratio | 0.28 | < 0.05 | –0.03 | 0.8918 |
| ESR [mm/h] | 0.29 | < 0.05 | 0.41 | < 0.05 |
| Psoriasis duration | 0.21 | 0.1384 | –0.05 | 0.7963 |
| PASI | 0.22 | 0.1207 | 0.40 | < 0.05 |
| BSA | 0.26 | 0.0723 | 0.33 | 0.0980 |
HDL – high density lipoprotein, LDL – low density lipoprotein, VLDL – very low-density lipoprotein, ESR – erythrocyte sedimentation rate, PASI – Psoriasis Area Severity Index, BSA – body surface area (% of body areas affected by psoriatic lesions), RS – Spearman’s rho coefficient.