[en] [en] BACKGROUND: The international multi-center randomized controlled STEPCARE-trial will investigate optimal management of sedation, temperature, and mean arterial pressure (MAP) during intensive care in out-of-hospital cardiac arrest (OHCA) patients due to various etiologies. The primary outcome is mortality at 6 months. This protocol describes an extended follow-up sub-study of the STEPCARE-trial with the main objective to provide detailed long-term outcomes for survivors and caregivers. It will focus on potential neuroprotection and improved recovery for different targets of sedation, temperature, and MAP management at 6 and 12 months post-OHCA.
METHODS: All survivors and one caregiver per survivor at selected STEPCARE sites will be invited to participate. Randomization is stratified by site. This sub-study extends the main STEPCARE follow-up at 6 months by undertaking detailed assessments, face-to-face meetings, inclusion of a caregiver, and repeating the assessments at 12 months. Our main outcome for survivors is cognitive function measured by the Montreal Cognitive Assessment, and for caregivers, the caregiver burden measured by the Zarit Burden Interview. Additional outcomes include symptoms of anxiety, depression, post-traumatic stress disorder, fatigue, physical function, life satisfaction, and life impact (disability), assessed by psychometrically robust measures. The estimated sample size is 600. Efforts to improve interrater reliability and decrease missing data are integral to the study design.
CONCLUSION: These detailed long-term outcomes will explore the possible benefits or risks of fever, sedation, and blood pressure management in post-OHCA survivors. Additionally, this study will explore survivorship after cardiac arrest from various perspectives, including different causes of arrest.
CLINICALTRIALS: gov: NCT0207942.
Disciplines :
Anesthesia & intensive care
Author, co-author :
Lilja, Gisela ; Department of Clinical Sciences, Lund University, Lund, Sweden ; Department of Neurology, Skåne University Hospital, Lund, Sweden
Töniste, Dorit; Department of Clinical Sciences, Lund University, Lund, Sweden ; Department of Neurology, Skåne University Hospital, Lund, Sweden
Bass, Frances; Critical Care Program, The George Institute for Global Health, University of New South Wales (UNSW) Sydney, Sydney, New South Wales, Australia ; Royal North Shore Hospital, Sydney, New South Wales, Australia
Jakobsen, Janus Christian; Copenhagen Trial Unit, Centre for Clinical Intervention Research Capital Region of Denmark, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark ; Department of Regional Health Research, The Faculty of Health Sciences, University of Southern Denmark, Copenhagen, Denmark
Nielsen, Niklas; Department of Clinical Sciences, Lund University, Lund, Sweden ; Department of Anesthesia and Intensive Care, Helsingborg Hospital, Helsingborg, Sweden
Skrifvars, Markus B; Department of Anesthesia and Intensive Care Medicine, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
Ullén, Susann; Clinical Studies Sweden Forum South, Skåne University Hospital, Lund, Sweden
Dankiewicz, Josef; Department of Clinical Sciences, Lund University, Lund, Sweden ; Department of Cardiology, Skåne University Hospital, Lund, Sweden
Levin, Helena; Department of Clinical Sciences, Lund University, Lund, Sweden ; Department of Research, Development, Education and Innovation, Skåne University Hospital, Lund, Sweden
Hästbacka, Johanna; Department of Anesthesia and Intensive Care, Tampere University Hospital, Wellbeing Services County of Pirkanmaa, Tampere, Finland ; Tampere University, Faculty of Medicine and Health Technology, Tampere, Finland
Knappe, Marion Moseby ; Department of Clinical Sciences, Lund University, Lund, Sweden ; Department of Rehabilitation Medicine, Skåne University Hospital, Lund, Sweden
Saxena, Manoj; Critical Care Program, The George Institute for Global Health, University of New South Wales (UNSW) Sydney, Sydney, New South Wales, Australia ; St George Hospital Clinical School, University of New South Wales, Sydney, New South Wales, Australia
Wise, Matt P; Adult Critical Care, University Hospital of Wales, Cardiff, UK
Young, Paul; Intensive Care Unit, Wellington Hospital, Wellington, New Zealand ; Medical Research Institute of New Zealand, Wellington, New Zealand ; Australian and New Zealand Intensive Care Research Centre, Monash University, Melbourne, Victoria, Australia ; Department of Critical Care, University of Melbourne, Melbourne, Victoria, Australia
Aneman, Anders ; Intensive Care Unit, Liverpool Hospital, South Western Sydney Local Health District, Sydney, New South Wales, Australia ; South Western Clinical School, University of New South Wales, Sydney, New South Wales, Australia ; The Ingham Institute for Applied Medical Research, Sydney, New South Wales, Australia
Ameloot, Koen; Department of Cardiology, Ziekenhuis Oost-Limburg, Genk, Belgium
Cole, Jade M; Adult Critical Care, University Hospital of Wales, Cardiff, UK
Cronberg, Tobias; Department of Clinical Sciences, Lund University, Lund, Sweden ; Department of Neurology, Skåne University Hospital, Lund, Sweden
Delaney, Anthony; Critical Care Program, The George Institute for Global Health, University of New South Wales (UNSW) Sydney, Sydney, New South Wales, Australia ; Malcolm Fisher Department of Intensive Care Medicine, Royal North Shore Hospital, Sydney, New South Wales, Australia ; Northern Clinical School, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
Druwé, Patrick; Department of Clinical Sciences, Lund University, Malmö, Sweden ; Department of Anesthesia and Intensive Care, Skåne University Hospital, Malmö, Sweden
During, Joachim; Department of Intensive Care Medicine, Ghent University Hospital, Ghent, Belgium
Graf, Tobias ; University Heart Center Lübeck, Medical Clinic II (Cardiology/Angiology/Intensive Care Medicine), Lübeck, Germany ; German Center for Cardiovascular Research (DZHK), Partner Site Hamburg/Kiel/Lübeck, Lübeck, Germany
Haenggi, Matthias; Institute of Intensive Care Medicine, University Hospital Zurich, Zurich, Switzerland
Heimburg, Katarina; Department of Clinical Sciences, Lund University, Lund, Sweden ; Department of Cardiology, Skåne University Hospital, Lund, Sweden
Itens, Manuela; Department of Intensive Care Medicine, Inselspital, University Hospital Bern, Bern, Switzerland
Barkholt, Caroline Kamp ; Copenhagen Trial Unit, Centre for Clinical Intervention Research Capital Region of Denmark, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
Keeble, Thomas R ; Essex Cardiothoracic Centre, Essex, UK ; Anglia Ruskin School of Medicine and MTRC, Essex, UK
Leithner, Christoph; Department of Neurology and Experimental Neurology, Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt- Universität Zu Berlin, Berlin, Germany
Lybeck, Anna ; Department of Clinical Sciences, Lund University, Lund, Sweden ; Department of Anesthesia and Intensive Care, Skåne University Hospital, Lund, Sweden
Lundin, Andreas; Department of Anesthesiology and Intensive Care Medicine, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
McGuigan, Peter ; Regional Intensive Care Unit, Royal Victoria Hospital, Belfast, UK ; Wellcome-Wolfson Institute for Experimental Medicine, Queen's University Belfast, Belfast, UK
Mengel, Annerose; Department of Neurology and Stroke, University Tuebingen, Tuebingen, Germany
Oksanen, Tuomas; Department of Anesthesia and Intensive Care Medicine, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
Ridgway, John; Occupational Therapy Department, St Bartholomew's Hospital, Barts Health NHS Trust, London, UK
Romundstad, Luis ; Department of Anesthesia and Intensive Care Medicine, Division of Emergencies and Critical Care Oslo University Hospital, Oslo, Norway
Schrag, Claudia; Clinic for Intensive Care Medicine, HOCH Cantonal Hospital St. Gallen, St. Gallen, Switzerland
STAMMET, Pascal ; University of Luxembourg ; Department of Anesthesia and Intensive Care, Centre Hospitalier De Luxembourg, Luxembourg, Luxembourg ; Department of Life Sciences and Medicine, Faculty of Science, Technology and Medicine, Esch-sur-Alzette, Luxembourg
Tippett, Anna; Critical Care Program, The George Institute for Global Health, University of New South Wales (UNSW) Sydney, Sydney, New South Wales, Australia
Thomas, Matthew; Department of Intensive Care Medicine, University Hospitals, Bristol and Weston, Bristol, UK
Tirkkonen, Joonas; Department of Anesthesia and Intensive Care, Tampere University Hospital, Wellbeing Services County of Pirkanmaa, Tampere, Finland
Undén, Johan; Department of Clinical Sciences, Lund University, Malmö, Sweden ; Department of Operation and Intensive Care, Halland Hospital, Halmstad, Sweden
Venkatesh, Bala; Critical Care Program, The George Institute for Global Health, University of New South Wales (UNSW) Sydney, Sydney, New South Wales, Australia ; Intensive Care Gold Coast University Hospital, Southport, QLD, Australia
Tiainen, Marjaana; Department of Neurology, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
Hammond, Naomi; Critical Care Program, The George Institute for Global Health, University of New South Wales (UNSW) Sydney, Sydney, New South Wales, Australia ; Malcolm Fisher Department of Intensive Care Medicine, Royal North Shore Hospital, Sydney, New South Wales, Australia
G. D. Perkins, C. W. Callaway, K. Haywood, et al., “Brain Injury After Cardiac Arrest,” Lancet 398 (2021): 1269–1278, https://doi.org/10.1016/S0140-6736(21)00953-3.
T. Cronberg, D. M. Greer, G. Lilja, V. Moulaert, P. Swindell, and A. O. Rossetti, “Brain Injury After Cardiac Arrest: From Prognostication of Comatose Patients to Rehabilitation,” Lancet Neurology 19 (2020): 611–622, https://doi.org/10.1016/S1474-4422(20)30117-4.
J. Holgersson, V. Niemela, M. B. Skrifvars, et al., “Fever Management With or Without a Temperature Control Device After Out-Of-Hospital Cardiac Arrest and Resuscitation (TEMP-CARE): A Study Protocol for a Randomized Clinical Trial,” Acta Anaesthesiologica Scandinavica 69 (2025): e70034, https://doi.org/10.1111/aas.70034.
A. Ceric, J. Dankiewicz, J. Hastbacka, et al., “Continuous Deep Sedation Versus Minimal Sedation After Cardiac Arrest and Resuscitation (SED-CARE): A Protocol for a Randomized Clinical Trial,” Acta Anaesthesiologica Scandinavica 69 (2025): e70022, https://doi.org/10.1111/aas.70022.
V. H. Niemela, M. Reinikainen, N. Nielsen, et al., “Higher Versus Lower Mean Arterial Blood Pressure After Cardiac Arrest and Resuscitation (MAP-CARE): A Protocol for a Randomized Clinical Trial,” Acta Anaesthesiologica Scandinavica 69 (2025): e70040, https://doi.org/10.1111/aas.70040.
J. P. Nolan, C. Sandroni, B. W. Bottiger, et al., “European Resuscitation Council and European Society of Intensive Care Medicine Guidelines 2021: Post-Resuscitation Care,” Intensive Care Medicine 47 (2021): 369–421, https://doi.org/10.1007/s00134-021-06368-4.
J. P. Nolan, C. Sandroni, L. W. Andersen, et al., “ERC-ESICM Guidelines on Temperature Control After Cardiac Arrest in Adults,” Resuscitation 172 (2022): 229–236, https://doi.org/10.1016/j.resuscitation.2022.01.009.
A. Granfeldt, M. J. Holmberg, J. P. Nolan, J. Soar, L. W. Andersen, and International Liaison Committee on Resuscitation Advanced Life Support Task F, “Targeted Temperature Management in Adult Cardiac Arrest: Systematic Review and Meta-Analysis,” Resuscitation 167 (2021): 160–172, https://doi.org/10.1016/j.resuscitation.2021.08.040.
K. G. Hirsch, B. S. Abella, E. Amorim, et al., “Critical Care Management of Patients After Cardiac Arrest: A Scientific Statement From the American Heart Association and Neurocritical Care Society,” Neurocritical Care 40 (2024): 1–37, https://doi.org/10.1007/s12028-023-01871-6.
M. Oddo, I. A. Crippa, S. Mehta, et al., “Optimizing Sedation in Patients With Acute Brain Injury,” Critical Care 20 (2016): 128, https://doi.org/10.1186/s13054-016-1294-5.
M. A. Hausburg, K. L. Banton, P. E. Roman, et al., “Effects of Propofol on Ischemia–Reperfusion and Traumatic Brain Injury,” Journal of Critical Care 56 (2020): 281–287, https://doi.org/10.1016/j.jcrc.2019.12.021.
L. Wihersaari, N. J. Ashton, M. Reinikainen, et al., “Neurofilament Light as an Outcome Predictor After Cardiac Arrest: A Post Hoc Analysis of the COMACARE Trial,” Intensive Care Medicine 47 (2021): 39–48, https://doi.org/10.1007/s00134-020-06218-9.
J. P. Nolan, C. Sandroni, B. W. Bottiger, et al., “European Resuscitation Council and European Society of Intensive Care Medicine Guidelines 2021: Post-Resuscitation Care,” Resuscitation 161 (2021): 220–269, https://doi.org/10.1016/j.resuscitation.2021.02.012.
G. Lilja, S. Ullen, J. Dankiewicz, et al., “Effects of Hypothermia vs. Normothermia on Societal Participation and Cognitive Function at 6 Months in Survivors After out-Of-Hospital Cardiac Arrest: A Predefined Analysis of the TTM2 Randomized Clinical Trial,” JAMA Neurology 80 (2023): 1070–1079, https://doi.org/10.1001/jamaneurol.2023.2536.
N. Zook, S. Voss, E. Blennow Nordstrom, et al., “Neurocognitive Function Following Out-Of-Hospital Cardiac Arrest: A Systematic Review,” Resuscitation 170 (2022): 238–246, https://doi.org/10.1016/j.resuscitation.2021.10.005.
M. Bohm, T. Cronberg, K. Arestedt, et al., “Caregiver Burden and Health-Related Quality of Life Amongst Caregivers of Out-Of-Hospital Cardiac Arrest Survivors,” Resuscitation 167 (2021): 118–127, https://doi.org/10.1016/j.resuscitation.2021.08.025.
C. Y. L. Yaow, S. E. Teoh, W. S. Lim, et al., “Prevalence of Anxiety, Depression, and Post-Traumatic Stress Disorder After Cardiac Arrest: A Systematic Review and Meta-Analysis,” Resuscitation 170 (2022): 82–91, https://doi.org/10.1016/j.resuscitation.2021.11.023.
A. Ceric, J. Holgersson, T. L. May, et al., “Effect of Level of Sedation on Outcomes in Critically Ill Adult Patients: A Systematic Review of Clinical Trials With Meta-Analysis and Trial Sequential Analysis,” EClinicalMedicine 71 (2024): 102569, https://doi.org/10.1016/j.eclinm.2024.102569.
M. S. Herridge and E. Azoulay, “Outcomes After Critical Illness,” New England Journal of Medicine 388 (2023): 913–924, https://doi.org/10.1056/NEJMra2104669.
R. Souron, J. Morel, L. Gergele, et al., “Relationship Between Intensive Care Unit-Acquired Weakness, Fatigability and Fatigue: What Role for the Central Nervous System?,” Journal of Critical Care 62 (2021): 101–110, https://doi.org/10.1016/j.jcrc.2020.11.019.
K. J. Neufeld, J. S. Leoutsakos, H. Yan, et al., “Fatigue Symptoms During the First Year Following ARDS,” Chest 158 (2020): 999–1007, https://doi.org/10.1016/j.chest.2020.03.059.
J. I. Cameron, L. M. Chu, A. Matte, et al., “One-Year Outcomes in Caregivers of Critically Ill Patients,” New England Journal of Medicine 374 (2016): 1831–1841, https://doi.org/10.1056/NEJMoa1511160.
D. M. Needham, J. Davidson, H. Cohen, et al., “Improving Long-Term Outcomes After Discharge From Intensive Care Unit: Report From a Stakeholders' Conference,” Critical Care Medicine 40 (2012): 502–509, https://doi.org/10.1097/CCM.0b013e318232da75.
M. Calvert, D. Kyte, R. Mercieca-Bebber, et al., “Guidelines for Inclusion of Patient-Reported Outcomes in Clinical Trial Protocols: The SPIRIT-PRO Extension,” Journal of the American Medical Association 319 (2018): 483–494, https://doi.org/10.1001/jama.2017.21903.
C. B. Kamp, J. Dankiewicz, M. Harboe Olsen, et al., “Sedation, Temperature and Pressure After Cardiac Arrest and Resuscitation-The STEPCARE Trial: A Statistical Analysis Plan,” Acta Anaesthesiologica Scandinavica 69 (2025): e70033, https://doi.org/10.1111/aas.70033.
V. R. M. Moulaert, C. M. van Heugten, T. P. M. Gorgels, D. T. Wade, and J. A. Verbunt, “Long-Term Outcome After Survival of a Cardiac Arrest: A Prospective Longitudinal Cohort Study,” Neurorehabilitation and Neural Repair 31 (2017): 530–539, https://doi.org/10.1177/1545968317697032.
A. Peskine, A. Cariou, D. Hajage, et al., “Long-Term Disabilities of Survivors of out-Of-Hospital Cardiac Arrest: The Hanox Study,” Chest 159 (2021): 699–711, https://doi.org/10.1016/j.chest.2020.07.022.
A. Viktorisson, K. S. Sunnerhagen, D. Johansson, J. Herlitz, and A. Axelsson, “One-Year Longitudinal Study of Psychological Distress and Self-Assessed Health in Survivors of Out-Of-Hospital Cardiac Arrest,” BMJ Open 9 (2019): e029756, https://doi.org/10.1136/bmjopen-2019-029756.
K. Haywood, L. Whitehead, V. M. Nadkarni, et al., “COSCA (Core Outcome Set for Cardiac Arrest) in Adults: An Advisory Statement From the International Liaison Committee on Resuscitation,” Circulation 137 (2018): e783–e801, https://doi.org/10.1161/CIR.0000000000000562.
K. Krishnan, H. Rossetti, L. S. Hynan, et al., “Changes in Montreal Cognitive Assessment Scores Over Time,” Assessment 24 (2017): 772–777, https://doi.org/10.1177/1073191116654217.
G. K. C. Wong, J. S. Y. Mak, A. Wong, et al., “Minimum Clinically Important Difference of Montreal Cognitive Assessment in Aneurysmal Subarachnoid Hemorrhage Patients,” Journal of Clinical Neuroscience 46 (2017): 41–44, https://doi.org/10.1016/j.jocn.2017.08.039.
A. M. N. Higgins, M. Bailey, J. Barrett, et al., “The Psychometric Properties and Minimal Clinically Important Difference for Disability Assessment Using WHODAS 2.0 in Critically Ill Patients,” Critical Care and Resuscitation 23 (2021): 103–112.
S. Tarvonen-Schroder, O. Tenovuo, A. Kaljonen, and K. Laimi, “Usability of World Health Organization Disability Assessment Schedule in Chronic Traumatic Brain Injury,” Journal of Rehabilitation Medicine 50 (2018): 514–518, https://doi.org/10.2340/16501977-2345.
G. Lilja, G. Nilsson, N. Nielsen, et al., “Anxiety and Depression Among Out-Of-Hospital Cardiac Arrest Survivors,” Resuscitation 97 (2015): 68–75, https://doi.org/10.1016/j.resuscitation.2015.09.389.
K. R. Lemay, H. E. Tulloch, A. L. Pipe, and J. L. Reed, “Establishing the Minimal Clinically Important Difference for the Hospital Anxiety and Depression Scale in Patients With Cardiovascular Disease,” Journal of Cardiopulmonary Rehabilitation and Prevention 39 (2019): E6–E11, https://doi.org/10.1097/HCR.0000000000000379.
E. M. Wachelder, V. R. Moulaert, C. van Heugten, J. A. Verbunt, S. C. Bekkers, and D. T. Wade, “Life After Survival: Long-Term Daily Functioning and Quality of Life After an Out-Of-Hospital Cardiac Arrest,” Resuscitation 80 (2009): 517–522, https://doi.org/10.1016/j.resuscitation.2009.01.020.
Y. J. Kim, J. C. Rogers, K. D. Raina, et al., “An Intervention for Cardiac Arrest Survivors With Chronic Fatigue: A Feasibility Study With Preliminary Outcomes,” Resuscitation 105 (2016): 109–115, https://doi.org/10.1016/j.resuscitation.2016.05.020.
V. L. Joshi, L. H. Tang, T. B. Mikkelsen, et al., “Does Time Heal Fatigue, Psychological, Cognitive and Disability Problems in People Who Experience an Out-Of-Hospital Cardiac Arrest? Results From the DANCAS Survey Study,” Resuscitation 182 (2022): 109639, https://doi.org/10.1016/j.resuscitation.2022.11.005.
V. L. Joshi, J. Christensen, E. Lejsgaard, R. S. Taylor, A. D. Zwisler, and L. H. Tang, “Effectiveness of Rehabilitation Interventions on the Secondary Consequences of Surviving a Cardiac Arrest: A Systematic Review and Meta-Analysis,” BMJ Open 11 (2021): e047251, https://doi.org/10.1136/bmjopen-2020-047251.
S. Rooney, D. A. McFadyen, D. L. Wood, D. F. Moffat, and P. L. Paul, “Minimally Important Difference of the Fatigue Severity Scale and Modified Fatigue Impact Scale in People With Multiple Sclerosis,” Multiple Sclerosis and Related Disorders 35 (2019): 158–163, https://doi.org/10.1016/j.msard.2019.07.028.
PTSD USDoVAPNCf, “PTSD Checklist for DSM-5 (PCL-5),” 2022, www.ptsd.va.gov/professional/assessment/adult-sr/ptsd-checklist.asap.
A. Presciutti, E. E. Meyers, M. Reichman, and A. M. Vranceanu, “Associations Between Baseline Total PTSD Symptom Severity, Specific PTSD Symptoms, and 3-Month Quality of Life in Neurologically Intact Neurocritical Care Patients and Informal Caregivers,” Neurocritical Care 34 (2021): 54–63, https://doi.org/10.1007/s12028-020-00980-w.
F. S. Teni, O. Rolfson, N. Devlin, et al., “Longitudinal Study of Patients' Health-Related Quality of Life Using EQ-5D-3L in 11 Swedish National Quality Registers,” BMJ Open 12 (2022): e048176, https://doi.org/10.1136/bmjopen-2020-048176.
P. van Gils, C. van Heugten, J. Hofmeijer, H. Keijzer, S. Nutma, and A. Duits, “The Montreal Cognitive Assessment Is a Valid Cognitive Screening Tool for Cardiac Arrest Survivors,” Resuscitation 172 (2021): 130–136, https://doi.org/10.1016/j.resuscitation.2021.12.024.
E. Blennow Nordstrom, L. Evald, M. Mion, et al., “Combined Use of the Montreal Cognitive Assessment and Symbol Digit Modalities Test Improves Neurocognitive Screening Accuracy After Cardiac Arrest: A Validation Sub-Study of the TTM2 Trial,” Resuscitation 202 (2024): 110361, https://doi.org/10.1016/j.resuscitation.2024.110361.
Z. S. Nasreddine, N. A. Phillips, V. Bedirian, et al., “The Montreal Cognitive Assessment, MoCA: A Brief Screening Tool for Mild Cognitive Impairment,” Journal of the American Geriatrics Society 53 (2005): 695–699, https://doi.org/10.1111/j.1532-5415.2005.53221.x.
M. J. Katz, C. Wang, C. O. Nester, et al., “T-MoCA: A Valid Phone Screen for Cognitive Impairment in Diverse Community Samples,” Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring 13 (2021): e12144, https://doi.org/10.1002/dad2.12144.
S. H. Zarit, K. E. Reever, and J. Bach-Peterson, “Relatives of the Impaired Elderly: Correlates of Feelings of Burden,” Gerontologist 20 (1980): 649–655, https://doi.org/10.1093/geront/20.6.649.
J. Caro-Codon, J. R. Rey, E. Lopez-de-Sa, et al., “Long-Term Neurological Outcomes in Out-Of-Hospital Cardiac Arrest Patients Treated With Targeted-Temperature Management,” Resuscitation 133 (2018): 33–39, https://doi.org/10.1016/j.resuscitation.2018.09.015.
R. Harding, W. Gao, D. Jackson, C. Pearson, J. Murray, and I. J. Higginson, “Comparative Analysis of Informal Caregiver Burden in Advanced Cancer, Dementia, and Acquired Brain Injury,” Journal of Pain and Symptom Management 50 (2015): 445–452, https://doi.org/10.1016/j.jpainsymman.2015.04.005.
X. Chen, D. Li, L. He, et al., “The Prevalence of Anxiety and Depression in Cardiac Arrest Survivors: A Systematic Review and Meta-Analysis,” General Hospital Psychiatry 83 (2023): 8–19, https://doi.org/10.1016/j.genhosppsych.2023.03.013.
E. Blennow Nordstrom, G. Lilja, S. Vestberg, et al., “Neuropsychological Outcome After Cardiac Arrest: A Prospective Case Control Sub-Study of the Targeted Hypothermia Versus Targeted Normothermia After Out-Of-Hospital Cardiac Arrest Trial (TTM2),” BMC Cardiovascular Disorders 20 (2020): 439, https://doi.org/10.1186/s12872-020-01721-9.
K. Heimburg, G. Lilja, A. B. Tornberg, et al., “Physical Activity After Cardiac Arrest; Protocol of a Sub-Study in the Targeted Hypothermia Versus Targeted Normothermia After out-Of-Hospital Cardiac Arrest Trial (TTM2),” Resusc Plus 5 (2021): 100076, https://doi.org/10.1016/j.resplu.2021.100076.
R. Umberger, “What Is the Best Core Measure After Critical Illness When the IES-R Is no Longer Accessible for New Researchers?,” Critical Care 23 (2019): 313, https://doi.org/10.1186/s13054-019-2595-2.
G. Lilja, N. Nielsen, S. Ullen, et al., “Protocol for Outcome Reporting and Follow-Up in the Targeted Hypothermia Versus Targeted Normothermia After out-Of-Hospital Cardiac Arrest Trial (TTM2),” Resuscitation 150 (2020): 104–112, https://doi.org/10.1016/j.resuscitation.2020.03.004.
H. C. Roberts, H. J. Denison, H. J. Martin, et al., “A Review of the Measurement of Grip Strength in Clinical and Epidemiological Studies: Towards a Standardised Approach,” Age and Ageing 40 (2011): 423–429, https://doi.org/10.1093/ageing/afr051.
V. L. Joshi, L. H. Tang, Y. J. Kim, et al., “Promising Results From a Residential Rehabilitation Intervention Focused on Fatigue and the Secondary Psychological and Physical Consequences of Cardiac Arrest: The SCARF Feasibility Study,” Resuscitation 173 (2022): 12–22, https://doi.org/10.1016/j.resuscitation.2022.02.002.
J. C. Jakobsen, C. Gluud, J. Wetterslev, and P. Winkel, “When and How Should Multiple Imputation Be Used for Handling Missing Data in Randomised Clinical Trials—A Practical Guide With Flowcharts,” BMC Medical Research Methodology 17 (2017): 162, https://doi.org/10.1186/s12874-017-0442-1.
K. N. Dainty, M. B. Seaton, K. Cowan, et al., “Partnering With Survivors & Families to Determine Research Priorities for Adult Out-Of-Hospital Cardiac Arrest: A James Lind Alliance Priority Setting Partnership,” Resusc Plus 7 (2021): 100148, https://doi.org/10.1016/j.resplu.2021.100148.