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Table 1 Search strategy according to the focused question (PICO)

From: Transcranial direct current stimulation for post-stroke dysphagia: a meta-analysis

Database

Search equation

Results identified

Results selected

PubMed

("Transcranial direct current stimulation" [Mesh]) AND ("Deglutition disorders" [Mesh])

("Electric stimulation" [Mesh]) AND ("Deglutition disorders” [Mesh])

(“Transcranial electric stimulation") AND ("Deglutition disorders” [Mesh])

(“Transcranial direct current stimulation" [Mesh]) AND ("Stroke" [Mesh])

("Electric stimulation" [Mesh]) AND ("Stroke" [Mesh])

("Transcranial electric stimulation") AND ("Stroke" [Mesh])

("Transcranial direct current stimulation" [Mesh]) AND (“Dysphagia”)

("Electric stimulation" [Mesh]) AND ("Dysphagia")

("Transcranial electric stimulation") AND ("Dysphagia")

1281

5

Medline

(MH “transcranial direct current stimulation”) AND (MH “deglutition disorders”)

(MH “electric stimulation”) AND (MH “deglutition disorders”)

(”transcranial electric stimulation”) AND (MH “deglutition disorders”)

(MH “transcranial direct current stimulation”) AND (MH “stroke”)

(MH “electric stimulation”) AND (MH “stroke”)

(”transcranial electric stimulation”) AND (“dysphagia”)

(MH “transcranial direct current stimulation”) AND (“dysphagia”)

(MH “electric stimulation”) AND (“dysphagia”)

(”transcranial electric stimulation”) AND (“dysphagia”)

1088

2

Web of Science

TS = (transcranial direct current stimulation) AND TS = (deglutition disorders)

TS = (electric stimulation) AND TS = (deglutition disorders)

TS = (transcranial electric stimulation) AND TS = (deglutition disorders)

TS = (transcranial direct current stimulation) AND TS = (stroke)

TS = (electric stimulation) AND TS = (stroke)

TS = (transcranial electric stimulation) AND TS = (stroke)

TS = (transcranial direct current stimulation) AND TS = (dysphagia)

TS = (electric stimulation) AND TS = (dysphagia)

TS = (transcranial electric stimulation) AND TS = (dysphagia)

2179

1

Scopus

TITLE-ABS-KEY(transcranial direct current stimulation) AND TITLE-ABS-KEY(deglutition disorders)

TITLE-ABS-KEY(electric stimulation) AND TITLE-ABS-KEY(deglutition disorders)

TITLE-ABS-KEY(transcranial electric stimulation) AND TITLE-ABS-KEY(deglutition disorders)

TITLE-ABS-KEY(transcranial direct current stimulation) AND TITLE-ABS-KEY(stroke)

TITLE-ABS-KEY(electric stimulation) AND TITLE-ABS-KEY (stroke)

TITLE-ABS-KEY(transcranial electric stimulation) AND TITLE-ABS-KEY (stroke)

TITLE-ABS-KEY(transcranial direct current stimulation) AND TITLE-ABS-KEY (dysphagia)

TITLE-ABS-KEY(electric stimulation) AND TITLE-ABS-KEY(dysphagia)

TITLE-ABS-KEY(transcranial electric stimulation) AND TITLE-ABS-KEY(dysphagia)

5998

2

CINAHL

(MH “transcranial direct current stimulation”) AND (MH “deglutition disorders”)

(MH “electric stimulation”) AND (MH “deglutition disorders”)

(”transcranial electric stimulation”) AND (MH “deglutition disorders”)

(MH “transcranial direct current stimulation”) AND (MH “stroke”)

(MH “electric stimulation”) AND (MH “stroke”)

(”transcranial electric stimulation”) AND (“dysphagia”)

(MH “transcranial direct current stimulation”) AND (“dysphagia”)

(MH “electric stimulation”) AND (“dysphagia”)

(”transcranial electric stimulation”) AND (“dysphagia”)

879

1