Table 4. The stratified analysis by the frequency of dental visit within 365 days prior to index date.
| All types of periodontitis | Moderate/severe periodontitis | |||
|---|---|---|---|---|
| aHRa (95% CI) | p value | aHRa (95% CI) | p value | |
| Subgroup 1: without dental visit within 365 days prior to index date | ||||
| Comparison | Reference | Reference | ||
| Psoriasis | 1.08 (0.97–1.20) | 0.1907 | 0.82 (0.58–1.17) | 0.2782 |
| Psoriatic arthritis | 1.19 (0.90–1.57) | 0.2334 | 1.87 (0.96–3.66) | 0.0656 |
| Subgroup 2: dental visit 1∼2 times within 365 days prior to index date | ||||
| Comparison | Reference | Reference | ||
| Psoriasis | 0.91 (0.77–1.08) | 0.2728 | 1.05 (0.66–1.68) | 0.8348 |
| Psoriatic arthritis | 1.19 (0.81–1.74) | 0.3841 | 0.42 (0.06–2.98) | 0.3818 |
| Subgroup 3: dental visit ≧3 times within 365 days prior to index date | ||||
| Comparison | Reference | Reference | ||
| Psoriasis | 0.96 (0.79–1.17) | 0.6910 | 0.58 (0.28–1.22) | 0.1524 |
| Psoriatic arthritis | 1.29 (0.85–1.96) | 0.2354 | 2.72 (1.08–6.83) | 0.0334 |
Notes.
a
Adjusted hazard ratio: this was adjusted for psoriasis exposure, age, sex, and co-morbidities.