Christopher M. Callahan

Collaborative Care Management of Late-Life Depression in the Primary Care Setting

Jürgen Unützer, Wayne Katon, Christopher M. Callahan et al. · JAMA · 2002 · 2.4K citations

Medicine, Psychiatry, Geriatric Psychiatry +11

Six-Item Screener to Identify Cognitive Impairment Among Potential Subjects for Clinical Research

Christopher M. Callahan, Frederick W. Unverzagt, Siu L. Hui et al. · Medical Care · 2002 · 1.5K citations

Medicine, Geriatric Medicine, Neurology +17

Monitoring Depression Treatment Outcomes With the Patient Health Questionnaire-9

Bernd L we, Christopher M. Callahan, Anthony J. Perkins et al. · Medical Care · 2004 · 1.4K citations

Nursing, Psychiatry, Clinical Psychology +16

Effectiveness of collaborative care for older adults with Alzheimer disease in primary care: a randomized controlled trial.

Christopher M. Callahan, Malaz Boustani, Frederick W. Unverzagt et al. · PubMed · 2006 · 793 citations

Medicine, Geriatric Medicine, Primary Care Nursing +17

Geriatric Care Management for Low-Income Seniors

Steven R. Counsell, Christopher M. Callahan, Daniel O. Clark et al. · JAMA · 2007 · 535 citations

Medicine, Geriatric Medicine, Geriatric Care +15