Table 1 Consort statement describing subject flow

Eligible for inclusion

142

Parents accepting participation

34

First polysomnography

34

Drop-outs

6

   Acute disease at 2^nd polysomnography

2

   Refusal of second polysomnography

2

   Poor technical quality of the second recording

1

   Werdnig-Hoffman myopathy

1

Second polysomnography

28

   Osteopathy

15

   Non-specific treatment

13