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Summary statistics for Bamford-Kowal-Bench SNR-50 scores at each grade level.
| Grade | N | Mean | SD | Min | Max |
|---|---|---|---|---|---|
| First | 118 | 3.64 | 3.64 | −2.5 | 18.5 |
| Second | 220 | 2.45 | 3.56 | −7.0 | 14.5 |
| Third | 149 | 1.87 | 3.29 | −5.5 | 11.5 |
| Fourth | 194 | 1.36 | 2.97 | −7.0 | 13.0 |
SNR, signal-to-noise ratio.
