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Naihua Duan

Researcher at Columbia University

Publications -  177
Citations -  21481

Naihua Duan is an academic researcher from Columbia University. The author has contributed to research in topics: Health care & Mental health. The author has an hindex of 60, co-authored 174 publications receiving 18824 citations. Previous affiliations of Naihua Duan include Cleveland Clinic & RAND Corporation.

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Purposeful Sampling for Qualitative Data Collection and Analysis in Mixed Method Implementation Research.

TL;DR: This paper reviews the principles and practice of purposeful sampling in implementation research, summarizes types and categories of purposefully sampling strategies and provides a set of recommendations for use of single strategy or multistage strategy designs, particularly for state implementation research.
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Health insurance and the demand for medical care: evidence from a randomized experiment.

TL;DR: This work estimates how cost sharing, the portion of the bill the patient pays, affects the demand for medical services and rejects the hypothesis that less favorable coverage of outpatient services increases total expenditure.
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Prevalence of Mental Illness in Immigrant and Non-Immigrant U.S. Latino Groups

TL;DR: It is suggested that immigrants benefit from a protective context in their country of origin, possibly inoculating them against risk for substance disorders, particularly if they emigrated to the United States as adults.
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Evidence‐Based Medicine, Heterogeneity of Treatment Effects, and the Trouble with Averages

TL;DR: The difficulties of applying global evidence ("average effects" measured as population means) to local problems (individual patients or groups who might depart from the population average) are discussed.
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Effectiveness of a quality improvement intervention for adolescent depression in primary care clinics: a randomized controlled trial.

TL;DR: A 6-month quality improvement intervention aimed at improving access to evidence-based depression treatments through primary care was significantly more effective than usual care for depressed adolescents from diverse primary care practices.