Table 1.

PICOs of Including Studies in the Meta-Analysis.

	Inclusion	Exclusion
Population	Patients with early-stage breast cancer (stages I and II), pathologically confirmed	Patient diagnosis of stage III or IV breast cancer, severe mental disorder, and/or cancer recurrence
Intervention	Patients who received CBT	Patients who received psychosocial therapy without using CBT technics (eg, mindfulness-based stress reduction)
Comparison/control group	Patients who received therapy without CBT	—
Outcomes	1. Anxiety 2. Depression 3. QoL	Duplicate results and studies that only reported changes with incomparable parameters, such as improve and relief, were excluded
Study design	RCTs	Case studies, quasi-experimental studies, and studies that did not define the methodology utilized were excluded

Abbreviations: PICO, patient/problem, intervention, comparison, outcome; CBT, cognitive behavioral therapy; QoL, quality of life; RCTs, randomized controlled trials.