Efficacy of the Supplementation With a Symbiotic, a Prebiotic and a Probiotic to Produce a Beneficial Effect on the Intestinal Microbiota and on the Characteristics of Feces in Children With Cerebral Palsy (CP) and Chronic Constipation

All the data registered in the case report forms will be monitored by the responsible party. This person will be monitoring each procedure during the study.

All the data in the case report forms will be obtained from the information obtained from the legal caregiver or the parents of the child and/or from the medical and electronic records and calls to the parents or legal caregivers and will be introduced daily in the Statistical Package for the Social Scienses (SPSS) program version 21. The responsible party will have access to this database and will verify the information.

Plan for missing data. In case that we have some missing variables, we will call the parents or legal caregiver of the children if it is about the data of the child. In case of missing data, unavailable or non-reported variable and it is not possible to compare the initial vs final phases, the subject will be excluded from the study. In case of finding an out-of-range laboratory results we will repeat the test. If we have some missing data from the subject but we can analyze other results from the same subject, it will not be excluded.

Standard Operating Procedures to address registry operations and analysis activities, such as patient recruitment, data collection, data management, data analysis, reporting for adverse events, and change management. Patients will be recruited from the nutrition and neurology outpatient at the New Hospital Civil of Guadalajara. We will apply a standardized questionnaire to the parents or legal caregivers to assure that the subject could be eligible to the study. Once all the inclusion criteria are fulfilled then another questionnaire or case report form will be filled. The informed consent will be explained and given to the parents or legal caregivers of the child for sign. An external person will be chose to assign randomly (by envelops) the subjects to each group. This person will provide the study product and the diaries to the parents or legal caregivers. Data from the case reports forms will be captured by the principal investigator and monitored by the responsible party. Te adverse events will be reported by phone calls during the four weeks (two to three phone calls in a week). To analyze the information, the SPSS program version 21 will be used.

Sample size. The sample size was calculated according to the next formula: