Source	Search strategy	Hits retrieved
CDCIG Register (crsweb.cochrane.org/login.html) [Date of most recent search: 13 January 2022]	(SLE OR sleep* OR circadian OR nocturnal OR insomnia* OR hypersomnia or parasomnia) AND (RCT OR CCT) AND (non‐pharmacological)	Jul 2011: Jun 2015: 237 Mar 2016: 3 Nov 2016: 0 Jan 2018: 2 Dec 2018: 9 Dec 2019: 13 Oct 2020: 6 Jan 2022: 20
MEDLINE In‐process and other non‐indexed citations and MEDLINE 1946‐present (OvidSP) [Date of most recent search: 13 January 2022]	1. exp Dementia/ 2. Delirium/ 3. Wernicke Encephalopathy/ 4. Delirium, Dementia, Amnestic, Cognitive Disorders/ 5. dement*.mp. 6. alzheimer*.mp. 7. (lewy* adj2 bod*).mp. 8. deliri*.mp. 9. (chronic adj2 cerebrovascular).mp. 10. ("organic brain disease" or "organic brain syndrome").mp. 11. ("normal pressure hydrocephalus" and "shunt*").mp. 12. "benign senescent forgetfulness".mp. 13. (cerebr* adj2 deteriorat*).mp. 14. (cerebral* adj2 insufficient*).mp. 15. (pick* adj2 disease).mp. 16. (creutzfeldt or jcd or cjd).mp. 17. huntington*.mp. 18. binswanger*.mp. 19. korsako*.mp. 20. "cognit* impair*".mp. 21. neurodegenerat*.mp. 22. cerebrovascular.mp. 23. neuropsychiatric.mp. 24. neurobehavioral.mp. 25. or/1‐24 26. exp Sleep/ 27. sleep*.ti,ab. 28. "Sleep Initiation and Maintenance Disorders"/ 29. insomnia.mp. 30. exp sleep disorders, circadian rhythm/ or "disorders of excessive somnolence"/ 31. (hypersomnia or parasomnia).mp. 32. circadian.mp. 33. or/26‐32 34. 25 and 33 35. randomized controlled trial.pt. 36. controlled clinical trial.pt. 37. randomized.ab. 38. placebo.ab. 39. drug therapy.fs. 40. randomly.ab. 41. trial.ab. 42. groups.ab. 43. or/35‐42 44. (animals not (humans and animals)).sh. 45. 43 not 44 46. 34 and 45	Jul 2011: Jun 2015: 94 Mar 2016: 232 Nov 2016: 185 Jan 2018: 463 Dec 2018: 198 Dec 2019: 463 Oct 2020: 466 Jan 2022: 758
Embase (OvidSP) 1974‐present [Date of most recent search: 13 January 2022]	1. exp Dementia/ 2. dement*.mp. 3. alzheimer*.mp. 4. (lewy* adj2 bod*).mp. 5. (chronic adj2 cerebrovascular).mp. 6. ("organic brain disease" or "organic brain syndrome").mp. 7. (cerebr* adj2 deteriorat*).mp. 8. (cerebral* adj2 insufficient*).mp. 9. (pick* adj2 disease).mp. 10. (creutzfeldt or jcd or cjd).mp. 11. huntington*.mp. 12. binswanger*.mp. 13. korsako*.mp. 14. or/1‐13 15. exp Sleep/ 16. sleep*.ti,ab. 17. sleep disorder/ 18. insomnia.mp. 19. circadian rhythm/ or circadian rhythm sleep disorder/ 20. circadian.mp. 21. (hypersomnia or parasomnia).mp. 22. somnolence/ 23. somnolence.mp. 24. or/15‐23 25. randomized controlled trial/ 26. controlled clinical trial/ 27. randomly.ab. 28. randomi?ed.ab. 29. groups.ab. 30. RCT.ti,ab. 31. "double‐blind*".ti,ab. 32. "single blind*".ti,ab. 33. placebo.ab. 34. randomi?ed.ti. 35. or/25‐34	Jul 2011: Jun 2015: 134 Mar 2016: 815 Nov 2016: 213 Jan 2018: 487 Dec 2018: 431 Dec 2019: 552 Oct 2020: 468 Jan 2022: 569
PSYCINFO 1806‐present (OvidSP) [Date of most recent search: 13 January 2022]	1. exp Dementia/ 2. dement*.mp. 3. alzheimer*.mp. 4. (lewy* adj2 bod*).mp. 5. (chronic adj2 cerebrovascular).mp. 6. ("organic brain disease" or "organic brain syndrome").mp. 7. (cerebr* adj2 deteriorat*).mp. 8. (cerebral* adj2 insufficient*).mp. 9. (pick* adj2 disease).mp. 10. (creutzfeldt or jcd or cjd).mp. 11. huntington*.mp. 12. binswanger*.mp. 13. korsako*.mp. 14. or/1‐13 15. exp Sleep Treatment/ or exp Sleep/ or exp Sleep Disorders/ 16. sleep*.ti,ab. 17. insomnia.mp. 18. exp Sleep Wake Cycle/ 19. circadian.mp. 20. (hypersomnia or parasomnia).mp. 21. exp Hypersomnia/ 22. somnolence.mp. 23. or/15‐22 24. exp Clinical Trials/ 25. randomly.ab. 26. randomi?ed.ab. 27. groups.ab. 28. RCT.ti,ab. 29. "double‐blind*".ti,ab. 30. "single blind*".ti,ab. 31. placebo.ab. 32. randomi?ed.ti. 33. or/24‐32 34. 14 and 23 and 33	Jul 2011: Jun 2015: 19 Mar 2016: 45 Nov 2016: 30 Jan 2018: 77 Dec 2018: 30 Dec 2019: 72 Oct 2020: 67 Jan 2022: 92
CINAHL (EBSCOhost) [Date of most recent search: 13 January 2022]		Jul 2011: Jun 2015: 12 Mar 2016: 45 Nov 2016: 19 Jan 2018: 85 Dec 2018: 129 Dec 2019: 231 Oct 2020: 198 Jan 2022: 238
Web of Science – all databases (Clarivate) [Date of most recent search: 13 January 2022	(dement* OR alzheimer* OR AD OR VCI OR VaD OR "vascular cognitive impairment" OR "lew* bod*" OR CADASIL) ANDTOPIC: (sleep* OR circadian* OR insomnia* OR hypersomnia OR parasomnia OR somnolence) ANDTOPIC: (randomized OR randomised OR randomly OR "random allocat*" OR RCT OR "double‐blind*" OR "single‐blind*") Timespan: All years. Search language=Auto	Jul 2011: Jun 2015: 31 Mar 2016: 109 Nov 2016: 83 Jan 2018: 206 Dec 2018: 89 Dec 2019: 175 Oct 2020: 162 Jan 2022: 217
LILACS (BIREME) [Date of most recent search: 13 January 2022]	dementia OR demencia OR alzheimer$ [Words] and sleep OR insomnia OR circadian OR hypersomnia OR parasomnia OR sueño OR dorme [Words] and randomised OR randomized OR trial OR randomly OR groups [Words]	Jul 2011: Jun 2015: 0 Mar 2016: 0 Nov 2016: 0 Jan 2018: 0 Dec 2018: 0 Dec 2019: 0 Oct 2020: 12 Jan 2022: 0
CENTRAL (the Cochrane Library) [Date of most recent search: 13 January 2022]	#1 MeSH descriptor: [Dementia] explode all trees #2 dement* #3 alzheimer* #4 lewy* near/2 bod* #5 chronic near/2 cerebrovascular #6 "organic brain disease" or "organic brain syndrome" #7 cerebr* near/2 deteriorat* #8 cerebral* near/2 insufficient* #9 pick* near/2 disease #10 creutzfeldt or jcd or cjd #11 huntington* #12 binswanger* #13 korsako* #14 #1 or #2 or #3 or #4 or #5 or #6 or #7 or #8 or #9 or #10 or #11 or #12 or #13 #15 sleep* #16 insomnia* #17 circadian #18 hypersomnia #19 parasomnia #20 MeSH descriptor: [Sleep] explode all trees #21 #15 or #16 or #17 or #18 or #19 or #20 #22 #14 and #21	Jul 2011: Jun 2015: 4 Mar 2016: 39 Nov 2016: 18 Jan 2018: 148 Dec 2018: 132 Dec 2019: 392 Oct 2020: 120 Jan 2022: 255
ClinicalTrials.gov (www.clinicaltrials.gov) [Date of most recent search: 13 January 2022]	sleep OR circadian OR nocturnal OR insomnia OR hypersomnia OR parasomnia | Interventional Studies | dementia OR alzheimers OR alzheimer OR lewy OR “vascular cognitive impairment” [Recruitment status: all]	Jul 2011: Jun 2015: 4 Mar 2016: 27 Nov 2016: 2 Jan 2018: 8 Dec 2018: 33 Dec 2019: 92 Oct 2020: 92 Jan 2022: 117
ICTRP Search Portal (apps.who.int/trialsearch) [includes: Australian New Zealand Clinical Trials Registry; ClinicalTrials.gov; ISRCTN; Chinese Clinical Trial Registry; Clinical Trials Registry – India; Clinical Research Information Service – Republic of Korea; German Clinical Trials Register; Iranian Registry of Clinical Trials; Japan Primary Registries Network; Pan African Clinical Trial Registry; Sri Lanka Clinical Trials Registry; The Netherlands National Trial Register] [Date of most recent search: 13 January 2022]	sleep OR circadian OR nocturnal OR insomnia OR hypersomnia OR parasomnia | Interventional Studies | dementia OR alzheimers OR Alzheimer OR lewy OR “vascular cognitive impairment” [Recruitment status: all]	Jul 2011: Jun 2015: 0 Mar 2016: 40 Nov 2016: 5 Jan 2018: 5 Dec 2018: 2 Dec 2019: 22 Oct 2020: n/a Jan 2022: 15
TOTAL before deduplication		Jul 2011: 415 Jun 2015: 535 Mar 2016: 1355 Nov 2016: 555 Jan 2018: 1481 Dec 2018: 1053 Dec 2019: 2012 Oct 2020: 1591 Jan 2022: 2281 TOTAL: 11,278
TOTAL after deduplication and first assessment (if performed) by Cochrane Dementia and Cognitive Improvement Group Information Specialists		Jul 2011: 69 Jun 2015: 247 Mar 2016: 43 Nov 2016: 40 Jan 2018: 72 Dec 2018: 136 Dec 2019: 1557 Oct 2020: 1231 Jan 2022: 1709 TOTAL: 5104