Table 1. Prevalence of Low Scores on Five NIHTB-CB Fluid Measures Overall and by Ability Level in the Combined TBI Sample.
| Low Scores | Age Norms | Age Norms by Education Level | Age Norms by Crystallized Composite | Demographic Norms | Demographic Norms by Crystallized Composite | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
| ||||||||||||||
| < 12 | 12 | 13-15 | 16+ | < 90 | 90-99 | 100-109 | 110 + | < 43 | 43-49 | 50-57 | 58 + | |||
|
| ||||||||||||||
| n=158 | n=17 | n=33 | n=56 | n=52 | n=43 | n=37 | n=42 | n=36 | n=158 | n=31 | n=42 | n=48 | n=37 | |
| ≤25th percentile | ||||||||||||||
| 5 | 19.0 | 41.2 | 24.2 | 19.6 | 7.7 | 37.2 | 27.0 | 7.1 | 2.8 | 17.1 | 29.0 | 21.4 | 14.6 | 5.4 |
| 4+ | 34.8 | 47.1 | 48.5 | 35.7 | 21.2 | 55.8 | 48.7 | 19.0 | 13.9 | 32.3 | 51.6 | 42.9 | 22.9 | 16.2 |
| 3+ | 48.7 | 58.8 | 63.6 | 50.0 | 34.6 | 74.4 | 59.5 | 35.7 | 22.2 | 48.7 | 71.0 | 59.5 | 37.5 | 32.4 |
| 2+ | 64.6 | 76.5 | 81.8 | 62.5 | 51.9 | 90.7 | 70.3 | 47.6 | 47.2 | 65.2 | 90.3 | 69.1 | 58.3 | 48.7 |
| 1+ | 75.9 | 94.1 | 87.9 | 76.8 | 61.5 | 97.7 | 83.8 | 64.3 | 55.6 | 78.5 | 96.8 | 85.7 | 77.1 | 56.8 |
| None | 24.1 | 5.9 | 12.1 | 23.2 | 38.5 | 2.3 | 16.2 | 35.7 | 44.4 | 21.5 | 3.2 | 14.3 | 22.9 | 43.2 |
|
| ||||||||||||||
| ≤16th percentile | ||||||||||||||
| 5 | 13.3 | 35.3 | 12.1 | 14.3 | 5.8 | 25.6 | 18.9 | 4.8 | 2.8 | 11.4 | 19.4 | 21.4 | 6.3 | 0.0 |
| 4+ | 26.0 | 47.1 | 33.3 | 26.8 | 13.5 | 51.2 | 35.1 | 7.1 | 8.3 | 22.8 | 41.9 | 28.6 | 12.5 | 13.5 |
| 3+ | 38.6 | 58.8 | 45.5 | 42.9 | 23.1 | 65.1 | 51.4 | 19.0 | 16.7 | 37.3 | 54.8 | 45.2 | 29.2 | 24.3 |
| 2+ | 53.8 | 64.7 | 66.7 | 51.8 | 44.2 | 79.1 | 62.2 | 35.7 | 36.1 | 51.9 | 77.4 | 57.1 | 41.7 | 37.8 |
| 1+ | 63.9 | 76.5 | 75.8 | 66.1 | 50.0 | 88.4 | 70.3 | 50.0 | 44.4 | 67.7 | 90.3 | 78.6 | 60.4 | 45.9 |
| None | 36.1 | 23.5 | 24.2 | 33.9 | 50.0 | 11.6 | 29.7 | 50.0 | 55.6 | 32.3 | 9.7 | 21.4 | 39.6 | 54.1 |
|
| ||||||||||||||
| ≤9th percentile | ||||||||||||||
| 5 | 7.6 | 29.4 | 9.1 | 7.1 | 0.0 | 18.6 | 10.8 | 0.0 | 0.0 | 8.2 | 16.1 | 11.9 | 6.3 | 0.0 |
| 4+ | 14.6 | 35.3 | 21.2 | 16.1 | 1.9 | 32.6 | 18.9 | 4.8 | 0.0 | 14.6 | 29.0 | 19.0 | 8.3 | 5.4 |
| 3+ | 25.9 | 47.1 | 39.4 | 26.8 | 9.6 | 51.2 | 35.1 | 9.5 | 5.6 | 26.0 | 45.2 | 33.3 | 16.7 | 13.5 |
| 2+ | 43.7 | 52.9 | 60.6 | 41.1 | 32.7 | 72.1 | 54.1 | 26.2 | 19.5 | 41.8 | 67.7 | 52.4 | 31.2 | 21.6 |
| 1+ | 51.3 | 64.7 | 63.6 | 48.2 | 42.3 | 76.7 | 59.5 | 35.7 | 30.6 | 52.5 | 80.6 | 64.3 | 41.7 | 29.7 |
| None | 48.7 | 35.3 | 36.4 | 51.8 | 57.7 | 23.3 | 40.5 | 64.3 | 69.4 | 47.5 | 19.4 | 35.7 | 58.3 | 70.3 |
|
| ||||||||||||||
| ≤5th percentile | ||||||||||||||
| 5 | 2.5 | 5.9 | 6.1 | 1.8 | 0.0 | 4.7 | 5.4 | 0.0 | 0.0 | 1.9 | 3.2 | 4.8 | 0.0 | 0.0 |
| 4+ | 7.0 | 23.5 | 12.1 | 3.6 | 1.9 | 18.6 | 5.4 | 2.4 | 0.0 | 6.3 | 19.4 | 7.1 | 2.1 | 0.0 |
| 3+ | 15.2 | 41.2 | 18.2 | 14.3 | 5.8 | 30.2 | 24.3 | 4.8 | 0.0 | 13.3 | 25.8 | 14.3 | 14.6 | 0.0 |
| 2+ | 31.0 | 41.2 | 33.3 | 35.7 | 21.2 | 53.5 | 43.3 | 11.9 | 13.9 | 28.5 | 54.8 | 35.7 | 20.8 | 8.1 |
| 1+ | 42.4 | 52.9 | 51.5 | 44.7 | 30.8 | 67.4 | 54.1 | 21.4 | 25.0 | 39.2 | 61.3 | 50.0 | 29.2 | 21.6 |
| None | 57.6 | 47.1 | 48.5 | 55.4 | 69.2 | 32.6 | 46.0 | 78.6 | 75.0 | 60.8 | 38.7 | 50.0 | 70.8 | 78.4 |
Note: Age norms are presented as standard scores with M=100 and SD=15, and demographically-adjusted norms are presented as T scores (M=50, SD=10).