Behind the protected sleep window, NU480's Unit 3 evidence summary sets eleven sources graded by Johns Hopkins level, three synthesized themes and one stated gap. Searches like "nu 480 unit 3 assignment example", "nu480 unit 3 sample" and "nu480 unit 3 example" land here.
Strong for Bundles, Thin for Sleep Alone: A Capstone Evidence Summary on Protecting Night Sleep to Prevent Delirium
[Student Name]
Purdue University Global
NU480: Four Spheres BSN Capstone
Unit 3 Assignment
[Instructor Name]
[Date]
Model document. Search counts are bracketed as the author's own; levels follow the Johns Hopkins model.
Search
PICOT question, restated from Unit 1: in medical inpatients aged 65 and over, would pausing routine night tasks from 2300 to 0500 under a nurse-run schedule, set against current practice, lower new delirium and scheduled interruptions across an eight-week pilot?
Databases: CINAHL, PubMed and the Cochrane Library. Dates: 2010 to [2025], with earlier seminal studies added from reference lists. Terms: delirium, sleep, sleep deprivation, night, nonpharmacological, prevention, older adults, hospitalized, combined with Boolean operators. Limits: English, adults 65 and older, acute care outside intensive care. Records: [38] screened by title and abstract, [19] read in full, [11] included. Every source received a level from I to V and a quality grade from A to C under the Johns Hopkins model (Dang et al., 2022).
Evidence Table
Each entry: citation; design; sample and setting; intervention; outcomes; level; quality.
1. Burton et al. (2021). Cochrane systematic review of randomized trials. Hospitalized adults outside intensive care. Nonpharmacological prevention, mostly multicomponent. Lower incidence of delirium with multicomponent interventions; moderate-certainty evidence. Level I; quality A.
2. Hshieh et al. (2015). Meta-analysis of randomized and nonrandomized studies. Older inpatients. Multicomponent nonpharmacological programs based on the Hospital Elder Life Program. Fewer cases of delirium and fewer falls than usual care. Level II; quality A.
3. Inouye et al. (1999). Prospective controlled trial with matched groups. [852] older medical inpatients. Multicomponent program including a nonpharmacological sleep protocol. Delirium 9.9 percent against 15.0 percent. Level II; quality A.
4. Arora et al. (2019). Quasi-experimental study. Adult medical units in an academic hospital. Record prompts and nurse education to reduce night disruptions. Fewer overnight vital-sign checks and night medication administrations. Level II; quality B.
5. McDowell et al. (1998). Pre-post study. Older medical inpatients. Nonpharmacologic sleep protocol: back rub, warm drink, relaxation tapes. Use of sleep medicine fell from 54 to 31 percent. Level II; quality B.
6. Yoder et al. (2012). Observational study. Adult medical inpatients. None. Night noise often above recommended levels; less sleep than at home. Level III; quality B.
7. Witlox et al. (2010). Meta-analysis of observational studies. Older patients. None. Delirium associated with death, institutionalization and dementia after discharge. Level III; quality A.
8. Tieges et al. (2021). Diagnostic meta-analysis. Older adults. 4AT screening. High sensitivity and specificity for delirium. Level III; quality A.
9. The 2023 Beers Criteria update (American Geriatrics Society Beers Criteria Update Expert Panel, 2023). Consensus guideline. Older adults. Medications to avoid. Advises against benzodiazepines and nonbenzodiazepine hypnotics. Level IV; quality A.
10. Marcantonio (2017). Clinical review. Hospitalized older adults. Prevention and management. Summary of risk factors and nonpharmacological prevention. Level V; quality A.
11. Inouye et al. (2014). Narrative review. Older people. Prevention and management. Estimates that a third or more of cases could be prevented. Level V; quality A.
Theme 1: Multicomponent Prevention Reduces Incident Delirium
The strongest evidence in the set supports multicomponent programs. The Cochrane review found that such programs reduced new delirium compared with usual care in hospitalized adults outside intensive care, with moderate-certainty evidence (Burton et al., 2021). The meta-analysis of programs based on the Hospital Elder Life Program reported fewer cases of delirium and fewer falls (Hshieh et al., 2015). The original trial of that program included a nonpharmacological sleep protocol among six components and reduced new delirium from 15.0 to 9.9 percent (Inouye et al., 1999).
In none of these studies can the effect of sleep be separated from the effect of the other components, so the evidence supports bundles and leaves the separate value of protecting sleep unknown. For the project, this theme justifies delirium as the outcome and supports protecting sleep as a reasonable component, but it cannot promise that sleep alone will reduce delirium.
Theme 2: Night Disruptions Can Be Reduced Without Harm
Hospital nights are disrupted by noise and by care. Sound meters on a general medicine ward recorded night noise well above guideline limits, and patients there slept less than they did at home (Yoder et al., 2012). The SIESTA study showed that record prompts and nurse education could reduce overnight vital-sign checks and night medication administrations on an adult medical unit (Arora et al., 2019). Its outcomes were disruptions and timing rather than delirium, so it shows that the change can be made, not that it prevents delirium.
For the project, this theme supports the interruption objective and shows that moving routine night tasks is feasible on a medical unit.
Theme 3: Sedative-Hypnotics Carry Risk, and a Protocol Can Reduce Them
The Beers Criteria advise against benzodiazepines and nonbenzodiazepine hypnotics in older adults, citing risks including delirium and falls (American Geriatrics Society Beers Criteria Update Expert Panel, 2023). A nonpharmacologic sleep protocol for older medical inpatients reduced the use of sleep medicine from 54 to 31 percent (McDowell et al., 1998). For the project, this theme supports comfort measures before sleep aids and adds a third objective, fewer sedative-hypnotic doses.
Gap
No included study tests a nurse-scheduled sleep window alone against incident delirium on a general medical unit. The multicomponent studies include sleep but cannot isolate it; the disruption studies measure disruptions but not delirium. That gap is what makes this capstone a practice project rather than a replication, and it is also why the project should not claim to prove that sleep alone prevents delirium.
Outcome measurement is supported by the evidence on the 4AT, which showed high sensitivity and specificity for delirium in older adults (Tieges et al., 2021), and on the outcomes of delirium, which justify measuring it at all (Witlox et al., 2010).
What the Evidence Means for the Protocol
Read together, the three themes shape the protocol in specific ways. Because multicomponent programs have the strongest support, the protected window will sit alongside the unit's existing orientation, mobility and hydration practices rather than replacing them. Because disruption studies show that night tasks can be moved safely, the protocol will name which tasks move and which do not. Because sedative-hypnotics carry risk, comfort measures come first on the checklist and sleep aids last. And because the gap is real, the evaluation will report delirium honestly as an outcome the project hopes to influence, not one it can claim to control.
Limitations of the Search
The search was limited to English and to three databases, and one reviewer screened all records, so relevant studies may have been missed. Unpublished sources, such as hospital quality reports, were not searched. Two included sources are older than the date range and were added from reference lists because they remain the most direct evidence on sleep protocols in older medical inpatients.
References
American Geriatrics Society Beers Criteria Update Expert Panel. (2023). American Geriatrics Society 2023 updated AGS Beers Criteria for potentially inappropriate medication use in older adults. Journal of the American Geriatrics Society, 71(7), 2052-2081. https://doi.org/10.1111/jgs.18372
Arora, V. M., Machado, N., Anderson, S. L., Desai, N., Marsack, W., Blossomgame, S., Tuvilleja, A., Ramos, J., Francisco, M. A., LaFond, C., Leung, E. K., Valencia, A., Martin, S. K., Meltzer, D. O., Farnan, J. M., Balachandran, J., Knutson, K. L., & Mokhlesi, B. (2019). Effectiveness of SIESTA on objective and subjective metrics of nighttime hospital sleep disruptors. Journal of Hospital Medicine, 14(1), 38-41. https://doi.org/10.12788/jhm.3091
Burton, J. K., Craig, L. E., Yong, S. Q., Siddiqi, N., Teale, E. A., Woodhouse, R., Barugh, A. J., Shepherd, A. M., Brunton, A., Freeman, S. C., Sutton, A. J., & Quinn, T. J. (2021). Non-pharmacological interventions for preventing delirium in hospitalised non-ICU patients. Cochrane Database of Systematic Reviews, 2021(7), CD013307. https://doi.org/10.1002/14651858.CD013307.pub2
Dang, D., Dearholt, S. L., Bissett, K., Ascenzi, J., & Whalen, M. (2022). Johns Hopkins evidence-based practice for nurses and healthcare professionals: Model and guidelines (4th ed.). Sigma Theta Tau International.
Hshieh, T. T., Yue, J., Oh, E., Puelle, M., Dowal, S., Travison, T., & Inouye, S. K. (2015). Effectiveness of multicomponent nonpharmacological delirium interventions: A meta-analysis. JAMA Internal Medicine, 175(4), 512-520. https://doi.org/10.1001/jamainternmed.2014.7779
Inouye, S. K., Bogardus, S. T., Charpentier, P. A., Leo-Summers, L., Acampora, D., Holford, T. R., & Cooney, L. M. (1999). A multicomponent intervention to prevent delirium in hospitalized older patients. New England Journal of Medicine, 340(9), 669-676. https://doi.org/10.1056/NEJM199903043400901
Inouye, S. K., Westendorp, R. G. J., & Saczynski, J. S. (2014). Delirium in elderly people. The Lancet, 383(9920), 911-922. https://doi.org/10.1016/S0140-6736(13)60688-1
Marcantonio, E. R. (2017). Delirium in hospitalized older adults. New England Journal of Medicine, 377(15), 1456-1466. https://doi.org/10.1056/NEJMcp1605501
McDowell, J. A., Mion, L. C., Lydon, T. J., & Inouye, S. K. (1998). A nonpharmacologic sleep protocol for hospitalized older patients. Journal of the American Geriatrics Society, 46(6), 700-705. https://doi.org/10.1111/j.1532-5415.1998.tb03803.x
Tieges, Z., Maclullich, A. M. J., Anand, A., Brookes, C., Cassarino, M., O'Connor, M., Ryan, D., Saller, T., Arora, R. C., Chang, Y., Agarwal, K., Taffet, G., Quinn, T., Shenkin, S. D., & Galvin, R. (2021). Diagnostic accuracy of the 4AT for delirium detection in older adults: Systematic review and meta-analysis. Age and Ageing, 50(3), 733-743. https://doi.org/10.1093/ageing/afaa224
Witlox, J., Eurelings, L. S. M., de Jonghe, J. F. M., Kalisvaart, K. J., Eikelenboom, P., & van Gool, W. A. (2010). Delirium in elderly patients and the risk of postdischarge mortality, institutionalization, and dementia: A meta-analysis. JAMA, 304(4), 443-451. https://doi.org/10.1001/jama.2010.1013
Yoder, J. C., Staisiunas, P. G., Meltzer, D. O., Knutson, K. L., & Arora, V. M. (2012). Noise and sleep among adult medical inpatients: Far from a quiet night. Archives of Internal Medicine, 172(1), 68-70. https://doi.org/10.1001/archinternmed.2011.603
How this NU480 Unit 3 example is structured
Synthesis, not summary, is how the paper moves. Theme one, that multicomponent prevention reduces incident delirium, draws on the two Level I reviews and notes that sleep is usually one component among several, so its separate effect is unknown. Theme two gathers evidence that night-time disruptions can be reduced without harm, led by SIESTA, whose outcomes are disruptions and vital-sign timing rather than delirium. Theme three concerns sedative-hypnotics, drawing on the 2023 AGS Beers Criteria and the reduction in sleep medication reported for the nonpharmacologic protocol. Each theme closes with what it means for the project. The gap paragraph states that no included study tests a nurse-scheduled sleep window alone against delirium on a general medical unit, which is what makes the capstone a practice project rather than a replication. Limitations of the search itself come last.
Get an NU480 Unit 3 example written to your instructions
Real, citable sources only: the desk builds the graded table and themed synthesis around your PICOT question and settled focus, following any appraisal model or table template the course requires. Include the instructions and rubric, and the summary returns within 24-48h, its gap stated plainly, with the first request free. The paper above is an original model document written by our desk, not a submitted student paper and not an official Purdue University Global document.
NU480 Unit 3 questions, answered
How many sources does a capstone evidence summary need?
Instructions vary, and your rubric sets the number, but many BSN capstones ask for roughly eight to fifteen peer-reviewed sources. Quality matters more than count: two strong systematic reviews support a project better than ten small descriptive studies. The sample includes eleven, led by two Level I reviews, and explains why each earned its place in the table.
Which appraisal model should I use?
The Johns Hopkins evidence-based practice model is common in nursing programs and gives each source a level and a quality rating. Some courses prefer the Melnyk and Fineout-Overholt hierarchy instead. Follow whichever your course names, applied the same way to every source. The sample uses Johns Hopkins and shows the rating for every source in its own column.
Can older landmark studies be included?
Usually, if you explain why. A foundational trial or protocol that shaped current practice often belongs in the table even when it falls outside the date range, as long as recent evidence carries the synthesis. The sample includes a 1998 sleep protocol for that reason and labels its age openly in the table and the text.