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Table 1 Clinical severity score (CSS) changes following 6-month ω-3 PUFAs supplementation in stage I RTT patients (individual items)

From: Partial rescue of Rett syndrome by ω-3 polyunsaturated fatty acids (PUFAs) oil

Clinical manifestation

Severity Score

P value

Before ω-3 PUFAs supplementation

After ω-3 PUFAs supplementation

(6 months)

Age of onset of regression

4 [4–4]

4 [4–4]

1.0

Somatic growth

1.5 [1–2]

1 [1–2]

0.8182

Head growth

3 [3–3]

3 [3–3]

1.0

Motor/independent sitting

4 [4–4]

0 [0–1]

0.0087

Ambulation

5 [5–5]

1 [1–4]

0.0152

Hand use

4 [4–4]

2 [2–2]

0.0022

Scoliosis

0 [0–0]

0 [0–0]

1.0

Language

4 [4–4]

3 [3–4]

0.0649

Nonverbal communication

5 [5–5]

0 [0–1]

0.0022

Respiratory dysfunction

4 [4–4]

1 [0–1]

<0.0001

Autonomic symptoms

0 [0–0]

0 [0–0]

1.0

Onset of stereotypies

4 [4–4]

4 [4–4]

1.0

Epilepsy/seizures

0 [0–0]

0 [0–0]

1.0

  1. The values are medians and inter-quartile ranges. CSS was assessed according to Neul et al. 2008. Specific mutations in methyl-CpG-binding protein 2 confer different severity in Rett syndrome