Table 5. Univariate analysis of potential risk indicators for peri-implantitis.
| Variable | No peri-implantitis (n=69) | Peri-implantitis (n=15) | P value | |
|---|---|---|---|---|
| Age (yr) | 51.19±13.35 | 53.33±11.82 | 0.72 | |
| No. of implants | 0.42 | |||
| 1 | 38 (55) | 6 (40) | ||
| 2 | 17 (25) | 4 (27) | ||
| ≥3 | 14 (20) | 5 (33) | ||
| Time since implant insertion | 6.1 (5.5/7.0) | 6.3 (5.9/6.5) | 0.93 | |
| Diabetes | 0.22 | |||
| No | 66 (96) | 13 (87) | ||
| Yes | 3 (4) | 2 (13) | ||
| Sex | 0.99 | |||
| Male | 30 (43) | 6 (40) | ||
| Female | 39 (57) | 9 (60) | ||
| Presence of keratinized mucosa | <0.001 | |||
| No | 10 (14) | 10 (67) | ||
| Yes | 59 (86) | 5 (33) | ||
| Overall periodontal treatment need (PSI ≥3) | 0.40 | |||
| No | 31 (45) | 9 (60) | ||
| Yes | 38 (55) | 6 (40) | ||
| Regular SIT attendance | 0.99 | |||
| No | 23 (33) | 5 (33) | ||
| Yes | 46 (67) | 10 (67) | ||
| Smoking | 0.03 | |||
| No | 53 (77) | 7 (47) | ||
| Yes | 16 (23) | 8 (53) | ||
| Prosthetic usage period in years | 0.27 | |||
| 5.0–5.9 | 33 (48) | 6 (40) | ||
| 6.0–6.9 | 16 (23) | 6 (40) | ||
| 7.0–7.9 | 20 (29) | 3 (20) | ||
| History of periodontitis | 0.68 | |||
| No | 58 (84) | 14 (93) | ||
| Yes | 11 (16) | 1 (7) | ||
Mean±standard deviation or median (25th/75th percentiles) of numerical variables and the absolute relative frequency of categorical variables are presented separately for patients with and without peri-implantitis. The last column represents the P value of the Wilcoxon rank-sum test and Fisher exact test. Significant results are highlighted in bold (significance level P<0.05)
SIT: supportive implant therapy.