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Comparison of the mean and standard deviation ratio between the Repetitive Head Impact Composite Index (RHICI) and individual scores on processing speed, choice reaction time, or letter fluency tests.
| Mean and standard deviation ratio | ||
|---|---|---|
| Active fighters (ratio) | Retire fighters (ratio) | |
| RHICI | 5.79 (1.00) | 4.89 (1.00) |
| Processing speed score | 2.23 (2.59) | 2.38 (2.05) |
| Choice reaction time | 1.94 (2.98) | 2.66 (1.84) |
| Letter fluency total correct score | 1.96 (2.95) | 1.69 (2.90) |
