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. 2019 Feb 17;8(2):252. doi: 10.3390/jcm8020252

Table 2.

Distribution of demographics and predictors according to the risk groups.

Variables Low Risk
Total of 102 Patients
Moderate Risk
Total of 68 Patients
High Risk
Total of 77 Patients
Very High Risk
Total of 108 Patients
Demographics N (within group %) N (within group %) N (within group %) N (within group %)
Average age in years 49.5 52.7 53.5 54.6
Sex
Female 56 (54.9%) 50 (73.5%) 45 (58.4%) 60 (56.6%)
Male 46 (45.1%) 18 (26.5%) 32 (41.6%) 46 (43.4%)
Predictors N (within group %) N (within group %) N (within group %) N (within group %)
History of Periodontitis 0 (0%) 13 (19.1%) 43 (55.8%) 81 (76.4%)
Bone level located on the implants’ middle third 0 (0%) 0 (0%) 2 (2.6%) 18 (17%)
Lack of prosthetic fit or non-optimal screw joint 0 (0%) 2 (2.9%) 2 (2.6%) 16 (15.1%)
Bacterial plaque 6 (5.9%) 37 (54.4%) 49 (63.6%) 95 (89.6%)
Bleeding 11 (10.8%) 35 (51.5%) 42 (54.5%) 87 (82.1%)
Type of restoration material
Ceramic 39 (38.2%) 13 (19.1%) 15 (19.5%) 12 (11.3%)
Metal–ceramic 45 (44.1%) 26 (38.2%) 39 (50.7%) 76 (71.7%)
Metal–acrylic 22 (21.6%) 35 (51.5%) 29 (37.7%) 18 (17%)
Acrylic 6 (5.9%) 4 (5.9%) 9 (11.7%) 23 (21.7%)
Adjacent implants/teeth present 84 (82.4%) 26 (38.2%) 41 (53.2%) 63 (59.4%)
Interaction presence of bacterial plaque * adjacent implants/teeth present 0 (0%) 9 (13.2%) 25 (32.5%) 56 (52.8%)
Smoker 19 (18.6%) 12 (17.6%) 22 (28.6%) 30 (28.3%)