PMID- 28715242 OWN - NLM STAT- MEDLINE DCOM- 20200527 LR - 20220429 IS - 1537-4424 (Electronic) IS - 1537-4416 (Print) IS - 1537-4416 (Linking) VI - 48 IP - sup1 DP - 2019 TI - Not All Masks Are Created Equal: Masking Success in Clinical Trials of Children and Adolescents. PG - S227-S233 LID - 10.1080/15374416.2017.1342547 [doi] AB - The current study assessed the success of masking omega-3 (Omega3) and psychotherapy in clinical trials of youth with depression or bipolar spectrum disorder. Participants were youth ages 7-14 with DSM-IV-TR diagnosed depressive (n = 72) or bipolar spectrum (n = 23) disorders. Inclusion diagnoses were depressive disorder, cyclothymic disorder, or bipolar disorder not otherwise specified. Exclusion diagnoses included bipolar I or II disorder, chronic medical condition or autism. Youth participated in 2 x 2 randomized controlled trials, in which they received Omega3 or placebo (PBO) and psychoeducational psychotherapy (PEP) or active monitoring (AM). Participants and study staff (including independent interviewers) were masked to Omega3/PBO allocation. Besides the masked independent interviewers, one coprincipal investigator (Co-PI) was fully masked to both conditions and completed all consensus conference ratings postrandomization. At the endpoint assessment or last completed interview, interviewers and the masked Co-PI guessed whether each child was assigned to Omega3 or PBO and to PEP or AM. Masking failure was calculated using the degree of correct guesses above chance level using binomial tests across all participants for Omega3 versus PBO and PEP versus AM. For all guessers, Omega3 allocation was guessed correctly approximately half the time (50%-52.5%). Rates of correct guessing were higher for PEP, but only the interviewer guesses were correct significantly more often (58.5%-68.7%) than chance. Reporting of masking success should be an essential element of RCTs. Psychotherapy is generally more difficult to mask, but with attentive masking procedures reasonable masking can be achieved. FAU - Jones, Lauren AU - Jones L AD - a Department of Psychology , The University of Notre Dame. FAU - Black, Sarah R AU - Black SR AUID- ORCID: 0000-0002-8090-1217 AD - b Department of Psychiatry and Behavioral Health , The Ohio State University Wexner Medical Center. FAU - Arnold, L Eugene AU - Arnold LE AD - b Department of Psychiatry and Behavioral Health , The Ohio State University Wexner Medical Center. FAU - Fristad, Mary A AU - Fristad MA AD - b Department of Psychiatry and Behavioral Health , The Ohio State University Wexner Medical Center. LA - eng GR - R34 MH085875/MH/NIMH NIH HHS/United States GR - R34 MH090148/MH/NIMH NIH HHS/United States PT - Journal Article PT - Randomized Controlled Trial DEP - 20170717 PL - England TA - J Clin Child Adolesc Psychol JT - Journal of clinical child and adolescent psychology : the official journal for the Society of Clinical Child and Adolescent Psychology, American Psychological Association, Division 53 JID - 101133858 SB - IM MH - Adolescent MH - Child MH - Diagnostic and Statistical Manual of Mental Disorders MH - Female MH - Humans MH - Male MH - Psychotherapy/*methods PMC - PMC9003566 MID - NIHMS1505364 EDAT- 2017/07/18 06:00 MHDA- 2020/05/28 06:00 PMCR- 2022/04/12 CRDT- 2017/07/18 06:00 PHST- 2017/07/18 06:00 [pubmed] PHST- 2020/05/28 06:00 [medline] PHST- 2017/07/18 06:00 [entrez] PHST- 2022/04/12 00:00 [pmc-release] AID - 10.1080/15374416.2017.1342547 [doi] PST - ppublish SO - J Clin Child Adolesc Psychol. 2019;48(sup1):S227-S233. doi: 10.1080/15374416.2017.1342547. Epub 2017 Jul 17.