Effectiveness and Minimum Effective Dose of App-Based Mobile Health Interventions for Anxiety and Depression Symptom Reduction: Systematic Review and Meta-Analysis

Sheng-Chieh Lu   ¹ , PhD ;   Mindy Xu   ² , BS ;   Mei Wang   ³ , MS ;   Angela Hardi   ⁴ , MLIS ;   Abby L Cheng   ^{3, 5} , MD ;   Su-Hsin Chang   ³ , PhD ;   Po-Yin Yen   ^{6, 7} , RN, PhD

¹ Department of Symptom Research, University of Texas MD Anderson Cancer Center, Houston, TX, United States

² Keck School of Medicine, University of Southern California, Los Angeles, CA, United States

³ Division of Public Health Sciences, Department of Surgery, Washington University in St Louis, St Louis, MO, United States

⁴ Becker Medical Library, Washington University in St Louis, St Louis, MO, United States

⁵ Division of Physical Medicine and Rehabilitation, Department of Orthopaedic Surgery, Washington University in St Louis, St Louis, MO, United States

⁶ Institute for Informatics, Washington University in St Louis, St Louis, MO, United States

⁷ Goldfarb School of Nursing, Barnes Jewish College, BJC HealthCare, St Louis, MO, United States