Table 1.

Summary of the data sources and selection.

Category	Specific standard requirements
Research database	Web of Science Core Collection
Searching period	January 2000–December 2024
Language	English
Searching keywords	((((((((TS = (Depression)) OR TS = (“Depressive Symptoms”)) OR TS = (“Depressive Symptom”)) OR TS = (“Symptom, Depressive”)) OR TS = (“Emotional Depression”)) OR TS = (“Depression, Emotional”)) OR TS = (“Depressive Disorder”)) OR TS = (“Bipolar Disorder”)) OR TS = (“Dysthymic Disorder”) AND ((((((((((TS = (Insomnia∗)) OR TS = (“Insomnia Disorder”)) OR TS = (“Chronic Insomnia”)) OR TS = (“Nonorganic Insomnia”)) OR TS = (“Insomnia, Nonorganic”)) OR TS = (“Primary Insomnia”)) OR TS = (“Psychophysiological Insomnia”)) OR TS = (“Insomnia, Psychophysiological”)) OR TS = (“Secondary Insomnia”)) OR TS = (“Transient Insomnia”)) OR TS = (“Insomnia, Transient”) AND (TS = (“comorbid”) OR TS = (“comorbidity”) OR TS = (“co-occurrence”))
Data extraction	Export with full records and cited references in plain text format
Sample size	1767