Table 2.
Severity and extent of periodontal disease, according to age
| Clinical parameter | Age (years) |
|||
|---|---|---|---|---|
| <30 Mean (SD) | 30–39.9 Mean (SD) | ≥40 Mean (SD) | P | |
| Average of: | ||||
| Gingival index | 1.13 (0.64) | 1.44 (0.75) | 1.74 (0.76) | <0.005 |
| Probing pocket depth (mm) | 2.02 (0.22) | 2.07 (0.30) | 2.23 (0.53) | <0.005 |
| Clinical attachment loss (mm) | 2.03 (0.22) | 2.15 (0.44) | 3.03 (1.37) | <0.005 |
| Gingival recession (mm) | 0.01 (0.03) | 0.08 (0.17) | 0.81 (1.19) | <0.005 |
| Average percentage of sites with: | ||||
| Probing pocket depth ≥3 mm | 2.74 (11.91) | 4.90 (15.65) | 15.51 (28.67) | <0.005 |
| ≥4 mm | 1.37 (6.36) | 1.81 (8.27) | 6.59 (18.58) | 0.008 |
| ≥5 mm | 0.33 (2.16) | 0.995 (5.71) | 2.87 (9.83) | 0.026 |
| ≥6 mm | 0.03 (0.20) | 0.42 (3.02) | 0.37 (1.39) | 0.230 |
| Clinical attachment loss ≥3 mm | 3.33 (12.32) | 7.89 (17.18) | 37.67 (37.68) | <0.005 |
| ≥4 mm | 1.55 (6.49) | 3.66 (9.62) | 27.66 (33.57) | <0.005 |
| ≥5 mm | 0.43 (2.21) | 1.87 (8.41) | 16.54 (27.40) | <0.005 |
| ≥6 mm | 0.02 (0.18) | 0.03 (0.23) | 2.13 (9.74) | 0.027 |
| Gingival recession ≥1 mm | 0.68 (2.57) | 4.06 (8.87) | 30.75 (37.20) | <0.005 |
| ≥2 mm | 0.14 (0.66) | 3.00 (6.80) | 22.57 (31.22) | <0.005 |
| ≥3 mm | 0.097 (0.56) | 0.64 (2.10) | 11.71 (23.27) | <0.005 |
| Bleeding on probing | 32.17 (44.49) | 47.91 (48.27) | 40.14 (44.98) | 0.104 |