Table 1_Non-invasive electrical stimulation for sleep disturbances in adults: protocol for

10%–30% of adults worldwide experience sleep disturbances. This document is a protocol for an evidence-mapping umbrella review of systematic reviews and meta-analyses on non-invasive electrical stimulation interventions for sleep, authored by Jingyi Zhu and last updated in May 2026. It outlines a methodology to search multiple databases from inception to April 2026, assess methodological quality, and perform subgroup analyses.

Use Cases

• Designing systematic review methodologies based on the described JBI guidelines and AMSTAR 2 quality assessment framework.
• Identifying evidence gaps for specific non-invasive electrical stimulation modalities mentioned in the description, such as transcranial electrical stimulation.
• Planning sensitivity analyses for meta-analyses based on the described exclusion criteria for reviews with low quality ratings or high risk of bias.
• Assessing primary study overlap in evidence synthesis using the Corrected Covered Area metric detailed in the protocol.

Strengths

• The protocol is registered with PROSPERO (CRD420261357590), providing a public record of the planned methodology.
• It specifies a comprehensive search strategy across 7 major databases and grey literature sources.
• The analysis plan includes advanced statistical methods like 95% prediction intervals and Egger's regression tests for review-level data.

Limitations

• The dataset is a 21.4 KB DOCX file containing only a protocol, not the actual review data or findings.
• The protocol restricts included literature to English, which the authors note may disproportionately impact evidence from certain modalities.
• Row count and column-level documentation are absent, as the file is a textual document.

Provenance

Source

figshare

Collection Method

Documented research protocol following JBI guidelines for evidence synthesis.

Time Range

Literature search planned from database inception to April 2026.

Freshness

Last updated 2026-05-28 11:18:52