• Internal consistency [ Time Frame: All groups : at inclusion ]
  Internal consistency was assessed by calculating the Cronbach's alpha coefficient from scores obtained at inclusion. A correlation coefficient of at least 0.7 was defined as indicative of adequate inter-relatedness of items. The Pearson correlation matrix was used to define the linear relationships between items.
• Test-retest reliability [ Time Frame: Control group : baseline and 1 month later ]
  The Lin concordance correlation coefficient was used to compute the level of agreement between the two assessments. In addition, the Bland-Altman limits-of-agreement method for assessing test-retest reliability was used as a complementary approach.
• Responsiveness to change [ Time Frame: Intervention group : baseline and 1 month after treatment. ]
  An estimate of the responsiveness or sensitivity to change of the measure was obtained using four statistical methods : effect size, standardized response mean,Guyatt responsiveness statistics, unpaired t-test (Wilcoxon test).

Drooling in children with CP is likely underestimated and under treated. It is an over-handicap for these children, because it causes many complications and may lead to a decline in self-esteem and to social isolation, altering the quality of life for patients and families. The therapeutic arsenal for the management of drooling includes rehabilitation techniques, oral drug treatments, local treatments or surgical treatments whose effectiveness is variable. In order to evaluate the efficacy of these therapies, standardized and valid assessment tools must be used. The Drooling Impact Scale (DIS) developed by Dr. Sue Reid's team in Melbourne in 2008, shows good validity and sensitivity to change, especially after botulinum toxin injection. It is commonly used in English-speaking studies, but no validation in French is available yet.

The aim of this study is to present the French translation of the Drooling Impact Scale (DIS-F) and to explore its validity, reliability and responsiveness to change in a group of children with CP.

• Cerebral Palsy
• Drooling

• Control
  Children whose drooling was expected to remain relatively stable over 1 month
• Intervention
  Children receiving a treatment to reduce their drooling

Inclusion Criteria:

• Cerebral palsy
• Hypersialorrhea
• No change in content and frequency of speech therapy for three months following baseline
• At least 1 out of 2 parents must have a clear understanding of french language
• Oral consent

Exclusion Criteria:

• No clear understanding of french language