Comparison 2. Insomnia severity: listening to music versus control – Insomnia Severity Index (ISI).

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
2.1 Insomnia severity: Insomnia Severity Index (ISI) – immediately postintervention	2	63	Mean Difference (IV, Random, 95% CI)	‐6.96 [‐15.21, 1.28]