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Table 3 Regression with their forms observed in individuals with RTT in Ireland

From: Rett syndrome in Ireland: a demographic study

Forms of regression

Frequency

Mean age ± SD (years)

Responses

General regression

96%

1.66 ± 0.732

N = 24

Behaviour regression

68%

1.40 ± 0.415

N = 17

Speech regression

84%

1.60 ± 0.678

N = 21

Motor regression

84%

3.61 ± 4.171

N = 21

Growth failure

48%

4.50 ± 4.855

N = 12

Regression hand use

88%

2.29 ± 1.426

N = 22

  1. The tabular data show the frequency of regression reported by the participants, including general regression, regression in behaviour, speech, motor, growth failure, and hand use. Age (mean and SD) at which specific forms of regression were observed, and the number of responses received for each parameter are mentioned