Table 3.
Normative data and cut-off values for MTA measures in relation to gender and education.
| Female Low Education (N = 105) |
Female High Education (N = 80) |
Male Low Education (N = 119) |
Male High Education (N = 86) |
Kruskal-Wallis | |
|---|---|---|---|---|---|
| MTA right | |||||
| Mean | 1.35 | 1.53 | 1.56 | 1.56 | X2 (3)=6.838; P=0.077 |
| Median | 1.00 | 1.00 | 1.00 | 1.50 | |
| SD | 0.60 | 0.73 | 0.72 | 0.71 | |
| Range | 0–4 | 0–3 | 0–4 | 0–3 | |
| Percentile 10th (cut-off) | 2 | 3 | 3 | 3 | |
| MTA left | |||||
| Mean | 1.26 | 1.50 | 1.56 a | 1.69 a | X2 (3)=20.981; P=0.003 |
| Median | 1.00 | 1.00 | 1.00 | 2.00 | |
| SD | 0.56 | 0.73 | 0.81 | 0.76 | |
| Range | 0–4 | 1–4 | 0–4 | 0–3 | |
| Percentile 10th (cut-off) | 2 | 2 | 3 | 3 | |
| MTA average | |||||
| Mean | 1.31 | 1.51 a | 1.56 a | 1.62 a | X2 (3)=17.180; P=0.020 |
| Median | 1.00 | 1.50 | 1.50 | 1.50 | |
| SD | 0.53 | 0.63 | 0.69 | 0.67 | |
| Range | 0–4 | 0.5 –3.5 | 0–4 | 0–3 | |
| Percentile 10th (cut-off) | 2 | 2.5 | 2.5 | 2.5 | |
| MTA highest | |||||
| Mean | 1.42 | 1.78 a | 1.79 a | 1.81 a | X2 (3)=20.499; P=0.003 |
| Median | 1.00 | 2.00 | 2.00 | 2.00 | |
| SD | 0.65 | 0.76 | 0.80 | 0.76 | |
| Range | 0–4 | 1–4 | 0–4 | 0–3 | |
| Percentile 10th (cut-off) | 2 | 3 | 3 | 3 | |
Education is coded as low when <9 years of education and high when ≥9 years of education. All P-values are adjusted with the Benjamini-Hochberg correction for multiple comparisons. a = Significantly different from Female Low Education. MTA = medial temporal atrophy; SD = standard deviation.
The “Percentile 10th (cut-off) value” (and higher values) is regarded as abnormal in each group.