Montiel‐Nava 2002.

Methods	A 6‐week randomised parallel trial with 2 arms: Methylphenidate Parent training No placebo or no‐intervention group
Participants	Number of participants screened: not stated Number of participants included: 24 Number randomised to methylphenidate: 12 and parent training: 12 Number followed up in methylphenidate‐arm: not stated Number of withdrawals in methylphenidate‐arm: not stated Diagnosis of ADHD: DSM‐IV (subtype: not stated) Age: mean 7.16 years old (range: 6‐10) IQ: mean: 92.25 (SD 15.64). Sex: total sample: 16 males, 8 females (not stated for the methylphenidate group) Methylphenidate‐naïve: 100% Ethnicity: Marabinos (from Northwestern Venezuela) Country: Venezuela Comorbidity: academic, oppositional and various behavioural problems Comedication: not stated Sociodemographics: not stated Inclusion criteria: DSM‐IV diagnosis of ADHD A score of 1.5 SD above the mean for the subscales of inattention, hyperactivity‐impulsivity, and DSM‐IV total in either Conners' Parent Rating Scale‐Revised or Conners' Teacher Rating Scale‐Revised IQ of or above 70 Symptoms severe enough to interfere and impair daily functioning No prior stimulant or psychological treatment Exclusion criteria: Meeting diagnostic criteria for a developmental disorder, mental impairment, or any sensory disturbance at the time of screening
Interventions	Methylphenidate type: not stated Methylphenidate dosage: 10 mg/daily at the start of the titration period Administration schedule: morning and noon Duration of intervention: 6 weeks, including 4 weeks of titration (after randomisation) Treatment compliance: not stated
Outcomes	A checklist of adverse effects were used, telephone interview with parent, once weekly during the 4‐week titration period
Notes	Sample calculation: no Ethics approval: not stated Funding/vested interests: not stated Authors' affiliations: not stated Key conclusions of the study authors: to our knowledge this is the first article describing the effectiveness of methylphenidate and parent training in Venezuelan children diagnosed with ADHD. It should be considered as a preliminary study, that supports the thesis of positive effects of psychosocial and psychopharmacological interventions in children with ADHD. There was no difference in the effectiveness of the 2 types of treatment Exclusion of methylphenidate non‐responders/children who have previously experienced adverse events on methylphenidate: no (only inclusion of methylphenidate‐naïve children) Supplemental information regarding ethics approval, funding, type of methylphenidate, number of males and females in the methylphenidate group, and adverse event data were not possible to receive through personal email correspondence with the authors. Emails sent twice without reply