Table 2.
Demographic and radiological characteristics of tap test responders and non-responders.
| Variable | Tap Test Responders N = 19 | Tap Test Non-Responders N = 26 | p |
|---|---|---|---|
| Gender (F/M) | 10/9 | 7/19 | 0.079 † |
| Age | 76 (71–79) | 74 (69.8–78) | 0.526 ‡ |
| Grading scale | 6 (5–7) | 6 (4–7) | 0.870 ‡ |
| Disease duration (months) | 36 (24–60) | 24 (12–48) | 0.225 ‡ |
| Peak flow velocity | 8.2 (5.7–10.6) | 6.8 (4.6–11.9) | 0.589 ‡ |
| Absolute stroke volume | 0.14 (0.11–0.32) | 0.11 (0.05–0.36) | 0.352 ‡ |
| Evan’s index | 2 (2–2) | 2 (2–2) | 0.169 ‡ |
| Narrow sulci | 1 (0–1) | 1 (0–1) | 0.214 ‡ |
| Sylvian fissures | 1 (0–1) | 1 (1–1) | 0.577 ‡ |
| Focally enlarged sulci | 0 (0–1) | 0 (0–1) | 0.202 ‡ |
| Temporal horns | 2 (2–2) | 2 (1–2) | 0.646 ‡ |
| Callosal angle | 1 (0–1) | 0 (0–0.25) | 0.036 ‡ * |
| Periventricular hyperintensity | 2 (1–2) | 2 (1–2) | 0.522 ‡ |
| Radscale total score | 8 (7–9) | 7 (7–8) | 0.249 ‡ |
N: number of subjects; demographic and radiological parameters are presented as median values (25th–75th percentile); † χ2 test; ‡ Mann–Whitney U test; statistically significant p-values are indicated with a *.