| Study | Reason for exclusion |
|---|---|
| ACTRN12615000212550 | Sleep problem not obligatory |
| ACTRN12617000056392 | Study not conducted |
| ACTRN12618001402235 | Study not conducted |
| Allen 2003 | Sleep not a primary outcome |
| Asiret 2018 | < 80% of participants with dementia |
| Bademli 2019 | < 80% of participants with dementia |
| Blytt 2018 | Pharmacological intervention |
| Bromundt 2016 | Sleep problem not obligatory |
| Burns 2009 | Sleep not a primary outcome |
| Chan 2011 | < 80% of participants with dementia |
| Chen 2021 | Sleep problem not obligatory |
| Cibeira 2021 | Sleep problem not obligatory |
| Cimenser 2021 | Sleep problem not obligatory |
| Colenda 1997 | Not an RCT design |
| Connell 2007 | Not an RCT design |
| Cremascoli 2022 | Sleep problem not obligatory |
| Dowling 2008 | Wrong study design (historical control group) |
| Falck 2020 | < 80% of participants with dementia |
| Friedman 2012 | < 80% of participants with dementia |
| Hanson 2013 | Sleep problem not obligatory |
| Hjetland 2020 | Sleep problem not obligatory |
| ISRCTN30488204 | Study not conducted |
| Judge 2011 | Not an RCT design |
| Jøranson 2021 | Sleep problem not obligatory |
| Kobayashi 2011 | < 80% of participants with dementia |
| Koyama 1999 | Not an RCT design |
| Kuck 2014 | < 80% of participants with dementia |
| Lee 2008b | Not an RCT design |
| Lee 2018a | Not an RCT design |
| Li 2013 | Not an RCT design |
| Li 2017 | Sleep problem not obligatory |
| Liu 2022 | Not an RCT design |
| Livingston 2019 | Sleep not a primary outcome |
| Lyketsos 1999 | Sleep problem not obligatory |
| Mailloux 2019 | Not an RCT design |
| Mishima 1994 | Not an RCT design |
| Mishima 1998 | Exclusion due to data loss |
| Most 2010 | < 80% of participants with dementia |
| Moyle 2018 | Sleep problem not obligatory |
| Naismith 2019 | < 80% of participants with dementia |
| Nascimento 2014 | Sleep problem not obligatory |
| NCT01123993 | Sleep problem not obligatory |
| NCT01816152 | Not an RCT design |
| NCT01894620 | Sleep is no primary outcome |
| NCT03445299 | Not an RCT design |
| NCT04364191 | < 80% of participants with dementia |
| Nguyen 2012 | Sleep not a primary outcome |
| NL1422 | Sleep not a primary outcome |
| Ouslander 2006 | < 80% of participants with dementia |
| Pa 2014 | < 80% of participants with dementia |
| Page 2014 | Not an RCT design |
| Pu 2021 | Sleep problem not obligatory |
| Richards 2020 | Pharmacological intervention |
| Riemersma‐van der Lek 2008 | Sleep not a primary outcome |
| Rodríguez‐Mansilla 2013 | Sleep problem not obligatory |
| Sloane 2007 | Sleep problem not obligatory |
| Sun 2013 | < 80% of participants with dementia |
| Tanaka 2012 | < 80% of participants with dementia |
| van Os 2012 | Study not conducted |
| Warburton 2013 | Not an RCT design |
| Wilhelmsen‐Langeland 2013 | < 80% of participants with dementia |
| Wolfe 1996 | Not an RCT design |
| Zeng 2016 | < 80% of participants with dementia |
RCT: randomised controlled trial.