Table 2.
Values of the evaluation items for the different age groups.
| Years | 65–69 |
70–74 |
75–79 |
80–84 |
≥85 |
P value |
|---|---|---|---|---|---|---|
| n = 137 |
n = 155 |
n = 189 |
n = 111 |
n = 52 |
||
| Median (Q1, Q3) | Median (Q1, Q3) | Median (Q1, Q3) | Median (Q1, Q3) | Median (Q1, Q3) | ||
| Age (years) | 68 (66, 69) | 72 (71, 74) | 77 (76, 78) | 82 (81, 83) | 88 (86, 90) | – |
| ΔE value | 44.3 (37.4, 48.4) | 43.9 (38, 49) | 40.5 (35.9, 45.6) | 41.4 (37.9, 46.5) | 38.2 (34.0, 43.5) | <0.001 |
| a∗ value | 19.6 (14.7, 23.0) | 19.9 (15.5, 23.3) | 17.3 (13.6, 21.0) | 18.0 (15.2, 21.6) | 16.5 (13.2, 19.9) | 0.001 |
| 10 Color Shades | 7 (6, 8) | 7 (6, 8) | 6 (5, 8) | 7 (6, 8) | 6 (5, 8) | 0.005 |
| 5 Color Scales | 4 (3, 4) | 4 (3, 4) | 3 (3, 4) | 3 (3, 4) | 3 (2, 4) | 0.006 |
| Number of present teeth | 22 (17, 27) | 21 (12, 25) | 15 (4, 24) | 9 (0, 24) | 3.5 (0, 13) | – |
| Number of artificial teeth | 0 (0, 8) | 2 (0, 14) | 11 (0, 23) | 17 (0, 28) | 24 (14, 28) | – |
| Number of functional teeth | 27 (26, 28) | 28 (26, 28) | 28 (27, 28) | 28 (27, 28) | 28 (28, 28) | – |
| Oral moisture score |
28.6 (26.9, 29.8) |
28.9 (27.1, 30.0) |
28.3 (26.7, 29.7) |
28.7 (27.7, 29.6) |
28.0 (25.9, 29.6) |
– |
| n (%) |
n (%) |
n (%) |
n (%) |
n (%) |
||
| Subjective symptoms of dry mouth | 38 (27.7) | 44 (28.4) | 64 (33.9) | 38 (34.2) | 16 (30.8) | – |
Q1: First quartile, Q3: Third quartile.
Jonckheere–Terpstra test; Bonferroni corrected P value, P < 0.0125.
All four evaluation methods for color-changeable chewing gum showed decreased values with increased age.