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Group sample sizes in nonregulated health care intervention trials described as randomized controlled trials were overly similar

Author(s): Thombs BD; Levis AW; Azar M; Saadat N; Riehm KE; Sanchez TA; Chiovitti MJ; Rice DB; Levis B; Fedoruk C; Lyubenova A; Malo Vázquez de Lara AL ...

Objectives: We evaluated whether sample sizes in different arms of two-arm parallel group randomized controlled trials of nonregulated interventions were systematically closer in size than would pl ...

Article GUID: 31866472


Equivalency of the diagnostic accuracy of the PHQ-8 and PHQ-9: a systematic review and individual participant data meta-analysis

Author(s): Wu Y; Levis B; Riehm KE; Saadat N; Levis AW; Azar M; Rice DB; Boruff J; Cuijpers P; Gilbody S; Ioannidis JPA; Kloda LA; McMillan D; Patten S ...

Background: Item 9 of the Patient Health Questionnaire-9 (PHQ-9) queries about thoughts of death and self-harm, but not suicidality. Although it is sometimes used to assess suicide risk, most posit ...

Article GUID: 31298180


Probability of major depression diagnostic classification using semi-structured versus fully structured diagnostic interviews

Author(s): Levis B; Benedetti A; Riehm KE; Saadat N; Levis AW; Azar M; Rice DB; Chiovitti MJ; Sanchez TA; Cuijpers P; Gilbody S; Ioannidis JPA; Kloda L ...

Background: Different diagnostic interviews are used as reference standards for major depression classification in research. Semi-structured interviews involve clinical judgement, whereas fully str ...

Article GUID: 29717691


Shortening self-report mental health symptom measures through optimal test assembly methods: Development and validation of the Patient Health Questionnaire-Depression-4

Author(s): Ishihara M; Harel D; Levis B; Levis AW; Riehm KE; Saadat N; Azar M; Rice DB; Sanchez TA; Chiovitti MJ; Cuijpers P; Gilbody S; Ioannidis JPA; ...

Background: The objective of this study was to develop and validate a short form of the Patient Health Questionnaire-9 (PHQ-9), a self-report questionnaire for assessing depressive symptomatology, ...

Article GUID: 30238571


Evaluation of Journal Registration Policies and Prospective Registration of Randomized Clinical Trials of Nonregulated Health Care Interventions

Author(s): Azar M; Riehm KE; Saadat N; Sanchez T; Chiovitti M; Qi L; Rice DB; Levis B; Fedoruk C; Levis AW; Kloda LA; Kimmelman J; Benedetti A; Thombs ...

Importance: Many interventions that are important to the health care of patients are not subject to regulation by the US Food and Drug Administration (FDA) or comparable regulatory bodies in other ...

Article GUID: 30855655


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