Table 2.
Results of gustatory test for each taste solution
| ADD | MCI | NDC | P value | ||||
|---|---|---|---|---|---|---|---|
| Median | IQR | Median | IQR | Median | IQR | ||
| Sweet | |||||||
| DT | 5 | 4–7 | 6 | 4–7 | 3 | 2–4.8 | 0.026 a |
| RT | 8 | 7–10 | 7 | 6–9 | 7.5 | 6–8 | 0.481 |
| RT - DT | 3 | 0–4 | 1 | 1–4 | 3 | 2–6 | 0.123 |
| Salty | |||||||
| DT | 4 | 2–5 | 3 | 2–5 | 2 | 1–3 | 0.075 |
| RT | 7 | 6–9 | 7 | 5.5–8 | 6 | 6–7 | 0.234 |
| RT - DT | 4 | 1–6 | 3 | 2–5 | 4 | 3–5 | 0.620 |
| Umami | |||||||
| DT | 9 | 6–11 | 6 | 2–9.5 | 4 | 1–7.8 | 0.038 b |
| RT | 14 | 12–14 | 13 | 10–14 | 10.5 | 9.3–12 | 0.008 c |
| RT - DT | 4 | 2–7 | 6 | 2–9 | 6 | 3.5–7.8 | 0.623 |
| Sour | |||||||
| DT | 4 | 2–6 | 3 | 1.5–5 | 1.5 | 1–4 | 0.064 |
| RT | 7 | 6–10 | 7 | 6–9.5 | 6 | 5.3–7.8 | 0.273 |
| RT - DT | 4 | 2–5 | 5 | 2–6 | 3.5 | 2.3–5.8 | 0.495 |
| Bitter | |||||||
| DT | 5 | 3–8 | 5 | 3–7 | 3.5 | 1.3–5 | 0.325 |
| RT | 8 | 6–10 | 7 | 5–8.5 | 6 | 5–7.8 | 0.055 |
| RT - DT | 4 | 0–5 | 1 | 1–3 | 2 | 1–4 | 0.258 |
All data were compared via the Kruskal–Wallis test followed by the Bonferroni correction
ADD Alzheimer’s disease dementia, MCI mild cognitive impairment, NDC non-demented control, IQR interquartile range, DT detection threshold, RT recognition threshold
a Significant difference between NDC and both MCI (p < 0.05) and ADD (p < 0.05)
b No significant difference by multiple comparisons
c Significant difference between NDC and ADD (p < 0.05)