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Page 6 of 21            Persico et al. Rare Dis Orphan Drugs J 2023;2:xx  https://dx.doi.org/10.20517/rdodj.2023.08

               Table  1.  Composition  of  the  active  compound.  The  active  comparator  is  devoid  of  CoQ10  and  contains  all  the  remaining  components
                                                                         Daily dose by patient weight
                Compounds
                                                                       ≤ 20 kg                   > 20 kg
                CoQ10                                                   50 mg                      100 mg
                Vitamin E                                               30 mg                      60 mg
                Vitamin B1(thiamine)                                     1.05 mg                   2.10 mg
                Vitamin B2 (riboflavin HCI)                            1.2 mg                      2.4 mg
                Vitamin B3 (Niacin)                                   9 mg                         18 mg
                Vitamin B5 (Pantothenic acid)                          4.5 mg                      9 mg
                Vitamin B6 (Pyridoxine)                                1.5 mg                  3 mg
                Vitamin B12 (Cyanocobalamine)                          4.5 μg                   9 μg
                Folic acid                                             0.1 mg                    0.2 mg
                Biotin                                                     0.1125 mg             0.225 mg

































                Figure 2. CONSORT flow-chart. Sixty-six PMS patients were assessed for eligibility. Thirty-five of them were recruited and randomized
                into groups receiving either active compound (n = 18) or active comparator (n = 17) during the first 4 months. Thirty-three patients
                completed the entire study, whereas one patient dropped out of each treatment group during the first 4-month period.

               educational, medical and psychiatric history. A detailed mental status examination was also performed,
               applying DSM-5 diagnostic criteria . The complete battery of neuropsychological and behavioral
                                               [36]
               assessments performed at T0, T1, and T2 is summarized in Table 2.
               Intellectual/developmental level was assessed using the Griffiths Developmental Rating Scales III, Wechsler
               Intelligence Scale for Children - Fourth Edition (WISC-IV), or the Leiter III scale, depending on age and
               expressive language development. Independent evaluators (B.F., B.M., T.G.), blind to treatment conditions
               and safety data, performed neuropsychological and behavioral testing. Given the exploratory nature of this
               RCT and the lack of preliminary data on sensitivity to change-over-time of psychodiagnostic scales in PMS
               patients, multiple primary and secondary measures were applied, selected among those previously used in
               individuals with PMS, ASD, intellectual disability, or displaying greater sensitivity in RCTs of fragile X
               syndrome [1,4,37-39] .
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