| Study | Reason for exclusion |
|---|---|
| Bang 2019 | Ineligible comparator |
| Blanaru 2012 | Ineligible comparator (comparison of 2 interventions, music listening versus muscle relaxation techniques) |
| Chan 2010 | Ineligible population (not all participants had insomnia. No inclusion criteria of insomnia and PSQI < 5) |
| Chen 2014 | Ineligible population (young adults with different sleep latencies. Poor sleepers (PSQI < 5) excluded) |
| Deshmukh 2009 | Ineligible comparator (comparison of 2 interventions, music listening versus hypnotic medications) |
| Garcia‐Molina 2019 | Ineligible population |
| Hausenblas 2019 | Ineligible comparator |
| Hérnandez‐Ruíz 2005 | Ineligible population (some participants were 'good sleepers') |
| Jespersen 2012 | Ineligible study design (quasi‐randomised trial) |
| KaradaĞ 2015 | Ineligible population |
| Kayumov 2003 | Ineligible comparator (individualised versus non‐individualised 'brain music') |
| Koenig 2013 | Ineligible population (healthy university students with no sleep problems) |
| Lafçi 2015 | Ineligible population |
| Lai 2012 | Ineligible comparator (live music with nursing presence versus prerecorded music) |
| Lai 2015 | Ineligible intervention (music video) |
| Lazic 2007 | Ineligible population (healthy university students) |
| Lio 2018 | Ineligible intervention |
| Lu 2020 | Ineligible population |
| Mottaghi 2016 | Ineligible intervention |
| Oxtoby 2013 | Ineligible population (university students. About 50% of participants experienced no sleep problems) |
| Qin 2020 | Ineligible intervention |
| Shobeiri 2016 | Ineligible intervention (music combined with counselling) |
| Sithinamsuwan 2012 | Ineligible population (some participants were 'good sleepers' with PSQI scores < 5) |
| Srikolcheep 2017 | Ineligible intervention |
| Weise 2020 | Ineligible population |
| Yamasato 2020 | Ineligible study design |
| Ziv 2008 | Ineligible comparator (music listening versus progressive muscular relaxation) |
PSQI: Pittsburgh Sleep Quality Index.