Table 6. Significant correlations between clinical periodontal parameters and serum parameters.
| Parameter | C (n=68) | H1 (n=66) | H2 (n=57) | |||
|---|---|---|---|---|---|---|
| ρ | P value | ρ | P value | ρ | P value | |
| PI and MPO | 0.476 | 0.000 | - | - | - | - |
| GI and oxLDL | 0.263 | 0.030 | - | - | - | - |
| BOP% and oxLDL | 0.471 | 0.000 | - | - | - | - |
| BOP% and anti-oxLDL | - | - | - | - | 0.276 | 0.040 |
| PD and MPO | 0.251 | 0.039 | 0.261 | 0.039 | - | - |
| PD and oxLDL | 0.372 | 0.002 | - | - | - | - |
| PD and anti-oxLDL | - | - | 0.255 | 0.044 | - | - |
| CAL and MPO | - | - | 0.339 | 0.007 | 0.400 | 0.002 |
| CAL and anti-oxLDL | - | - | 0.279 | 0.027 | 0.280 | 0.037 |
| GI and TC/HDL | - | - | 0.565 | 0.015 | 0.302 | 0.022 |
| BOP% and TC/HDL | - | - | 0.280 | 0.034 | 0.268 | 0.036 |
| PD and HDL | - | - | −0.565 | 0.015 | - | - |
| GI and HDL | - | - | - | - | −0.352 | 0.007 |
| GI and LDL | - | - | - | - | 0.282 | 0.034 |
| GI and VLDL | - | - | - | - | 0.264 | 0.047 |
| MPO and oxLDL | - | - | - | - | 0.454 | 0.001 |
| TC/HDL and oxLDL | - | - | 0.277 | 0.037 | 0.678 | 0.002 |
| Periodontitis severity and TC/HDL | - | - | 0.216 | 0.034 | 0.578 | 0.015 |
| Periodontitis severity and anti-oxLDL | - | - | 0.251 | 0.027 | 0.375 | 0.007 |
C: systemically healthy control, H1: hyperlipidemic patients with mild-to-moderate metabolic control, H2: hyperlipidemic patients with poor metabolic control, ρ: Spearman's correlation coefficient, PI: plaque index, GI: gingival index, PD: probing pocket depth, BOP%: percentage of bleeding on probing, CAL: clinical attachment loss, LDL: low-density lipoprotein, HDL: high-density lipoprotein, TC/HDL: ratio of total cholesterol to high-density lipoprotein, VLDL: very low-density lipoprotein, MPO: myeloperoxidase, oxLDL: oxidized low-density lipoprotein, anti-oxLDL: anti-oxidized low-density lipoprotein.