Table 2.
Descriptive statistics of the periodontally involved molar study population (N=816).
| Analytical molars* (N=735) | All molars (N=816) | |||
|---|---|---|---|---|
| Extracted | Not Extracted | Extracted | Not Extracted | |
| Variable | N (%) | N (%) | N (%) | N (%) |
| ≥ 40 years of age | 352 (58.76) | 82 (60.29) | 110 (62.15) | 370 (57.90) |
| < 40 years of age | 247 (41.24) | 54 (39.71) | 67 (37.85) | 269 (42.10) |
| PPD < 5mm | 1 (0.74) | 20 (3.34) | 5 (2.82) | 56 (8.76) |
| PPD 5–7 mm | 71 (52.21) | 428 (71.45) | 75 (42.37) | 428 (66.98) |
| PPD 8–10 mm | 54 (39.71) | 146 (24.37) | 68 (38.42) | 150 (23.47) |
| PPD 11+ | 10 (7.35) | 5 (0.83) | 29 (16.38) | 5 (0.78) |
| No mobility or Cl I | 108 (79.41) | 566 (94.49) | 120 (67.80) | 603 (94.37) |
| Cl II | 20 (14.71) | 23 (3.84) | 29 (16.38) | 24 (3.76) |
| Cl III | 8 (5.88) | 10 (1.67) | 28 (15.82) | 12 (1.88) |
| Non-smoker | 424 (70.78) | 63 (46.32) | 92 (51.98) | 460 (71.99) |
| Smoker | 175 (29.22) | 73 (53.68) | 85 (48.02) | 179 (28.01) |
| No Furcation | 44 (32.35) | 311 (51.92) | 50 (28.25) | 347 (54.30) |
| 1 Furcations | 51 (37.50) | 185 (30.88) | 54 (30.51) | 185 (28.95) |
| 2 Furcations | 26 (19.12) | 75 (12.52) | 39 (22.03) | 77 (12.05) |
| 3 Furcations or “thru-thru” | 15 (11.03) | 28 (4.67) | 34 (19.21) | 30 (4.69) |
| Mandibular molar | 59 (43.38) | 310 (51.75) | 74 (41.81) | 334 (52.27) |
| First maxillary molar | 37 (27.21) | 152 (25.38) | 46 (25.99) | 158 (24.73) |
| Second maxillary molar | 40 (29.41) | 137 (22.87) | 57 (32.20) | 147 (23.00) |
| Miller-McEntire Score = 13 | N/A | N/A | 1 (0.56) | 2 (0.31) |
| Miller-McEntire Score = 12 | N/A | N/A | 7 (3.95) | 2 (0.31) |
| Miller-McEntire Score = 11 | 10 (7.35) | 4 (0.67) | 16 (9.04) | 4 (0.63) |
| Miller-McEntire Score = 10 | 9 (6.62) | 13 (2.17) | 12 (6.78) | 13 (2.03) |
| Miller-McEntire Score = 9 | 15 (11.03) | 21 (3.51) | 21 (11.86) | 21 (3.29) |
| Miller-McEntire Score = 8 | 15 (11.03) | 45 (7.51) | 20 (11.30) | 38 (5.95) |
| Miller-McEntire Score = 7 | 16 (11.76) | 38 (6.34) | 20 (11.30) | 45 (7.04) |
| Miller-McEntire Score = 6 | 15 (11.03) | 45 (7.51) | 27 (15.25) | 80 (12.52) |
| Miller-McEntire Score = 5 | 15 (11.03) | 80 (13.36) | 16 (9.04) | 80 (12.52) |
| Miller-McEntire Score = 4 | 10 (7.35) | 69 (11.52) | 11 (6.21) | 69 (10.80) |
| Miller-McEntire Score = 3 | 13 (9.56) | 94 (15.69) | 14 (7.91) | 97 (15.18) |
| Miller-McEntire Score = 2 | 4 (2.94) | 100 (16.69) | 6 (3.39) | 105 (16.43) |
| Miller-McEntire Score = 1 | 4 (2.94) | 55 (9.18) | 5 (2.82) | 69 (10.80) |
| Miller-McEntire Score = 0 | N/A | N/A | 1 (0.56) | 14 (2.19) |
| Miller-McEntire score for all molars | 6.93±2.89 (0–13) | 4.32±2.56 (0–13) | 6.54±2.86 (0–12) | 4.32±2.56 (0–13) |
| Miller-McEntire score molars with PPD <5 mm |
1.20±0.84 (0–2) | 2.39±2.22 (0–7) | 1.20±0.84 (0–2) | 2.39±2.22 (0–7) |
| Miller-McEntire score molars with PPD ≥5 mm | 7.10±2.76 (1–13) | 4.50±2.52 (1–13) | 6.74±2.71 (1–12) | 4.50±2.52 (1–13) |
*
Molars used for determining scoring levels.