Table 4. BNT-30 Normative Data by Age and WRAT-3 Reading*.
| Age range | N | Min | Max | M (SD) | Cut-off (-1.5 SD) | Cut-off (-2.0 SD) |
|---|---|---|---|---|---|---|
| Average | ||||||
| 55-64 years old | 21 | 26 | 30 | 28.8 (1.3) | 27 | 26 |
| 65-74 years old | 15 | 23 | 30 | 27.4 (2.1) | 24 | 23 |
| 75-84 years old | 11 | 22 | 29 | 26.7 (2.1) | 26 | 25 |
| 85+ years old | - | - | - | - | - | - |
| High average or better | ||||||
| 55-64 years old | 25 | 26 | 30 | 29.3 (0.9) | 28 | 28 |
| 65-74 years old | 67 | 22 | 30 | 29.1 (1.6) | 27 | 26 |
| 75-84 years old | 61 | 22 | 30 | 28.5 (1.8) | 26 | 25 |
| 85+ years old | 15 | 26 | 30 | 29.0 (1.4) | 27 | 26 |
Note:
*
n = 215, 4 participants did not complete the WRAT-3; cut-off scores are intended to reflect values where at least mild (-1.5 SD) or moderate (-2.0 SD) impairment is present in reference to our normative sample.