Table 1.
Baseline and follow‐up data on age and comparisons for years of education, CTG expansion size, and MIRS outcome per group
| Baseline | Follow‐up | Z | p | |
|---|---|---|---|---|
| Mean (SD) | Mean (SD) | |||
| Age | ||||
| Control | 42 (13.59) | 53.44 (13.51) | – | – |
| DM1 | 38.65 (11.105) | 50.40 (11.00) | – | – |
| Years of education | ||||
| Control | 16.28 (4.45) | 16.35 (4.99) | −0.34 | .73 |
| DM1 | 14.45 (3.95) | 14.55 (4.59) | −0.03 | .98 |
| CTG | ||||
| DM1 | 531.54 (437.26) | 651.12 (531.21) | −4.39*** | .00 |
| MIRS | ||||
| DM1 | 2.34 (0.883) | 2.51 (1.00) | −1.40 | .16 |
CTG = triplet expansion size; DM1 = myotonic dystrophy type 1; MIRS = Muscular Impairment Rating Scale; SD = standard deviation.
***p < .001.