Review Article
Rett Syndrome: Coming to Terms with Treatment
Table 2
Rett syndrome timing of regression period.
| |
Age at regression |
Classic RTT | Variant RTT | | Higher functioning | Lower functioning |
| | <6 months | 13 (1.7%) | 3 (4.4%) | 27 (38%) | | 6–<12 months | 54 (7.0%) | 2 (2.9%) | 9 (12%) | | 12–<18 months | 281 (36%) | 2 (2.9%) | 15 (21%) | | 18–30 months | 351 (46%) | 26 (38%) | 10 (14%) | |
>30 months | 74 (9.6%) | 35 (52%) | 11 (15%) |
| | Total | 773 | 68 | 72 |
|
|
