Author, date and country | Patient group | Study type (level of evidence) | Outcomes | Key results | Study Weaknesses |
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Wrenn, K. Brody, S. L. 1992 United States | 37 consecutive adult patients for whom a DNR order was issued during the author’s shifts in the ED of a hospital in Atlanta over a 10 month period (1987-1988). | Prospective single-centre case series with collection and analysis of patient data. | Analysis of characteristics for patients assigned a DNR order including: patient age, acute and chronic problems, prior DNR orders and capacity. | • Elderly (overall mean age 70) o Subset (32% of patients) were younger (mean age 54) and critically ill with malignancy or AIDS. • Chronic disease & comorbidity (uniformly present) o Dementia (46%), decubitus ulcers (41%), malignancy (24%), stroke (19%), chronic renal failure (11%), AIDS (8%), chronic heart disease (8%), chronic neurologic disease (5%), malnutrition (5%), alcoholism (3%). • Acute disease o Sepsis (59%), coma (49%), hypotension (49%), respiratory failure (16%), dehydration (11%), hypothermia (8%), congestive heart failure, stroke, status epilepticus, acute MI, severe anaemia, hyponatraemia (3%) each. • 14% of patients had capacity • 14% of patients had prior DNR orders | Small sample size. Only represents those patients for whom the authors initiated a DNR order, introducing a large potential for bias. This study only looks at DNR orders, a subset of treatment limiting decisions. Does not provide comparison group. |
Le Conte, Philippe Baron, Denis Trewick, David Touzé, Marie Dominique Longo, Céline Vial, Irshaad Ya 2004 France | All non-trauma patients (n= 119) for whom a decision to withhold (WH) or withdraw (WD) life-sustaining treatment was taken by senior staff in a French ED between January and September 1998. | Prospective single-centre survey. When making a WH/WD decision, physicians were required to justify it by choosing from 17 pre-defined criteria. Patient characteristics were also recorded. | Predefined criteria used to justify treatment limiting decision | • Mean of 6±2 criteria chosen per case. ‘Expected quality of life unacceptably poor’ was never chosen alone. o Principal acute medical disorder (83%) o Irreversibility of acute disorder in the first 24h (60%) o Level of care considered maximal (59%) o Severity of illness using scoring systems (40%) o Vegetative state (40%) o Post-morbid expected quality of life unacceptably poor (39%) o Underlying disease expected to be fatal within 6 months (37%) o Age (24%) o Underlying chronic debilitating disease (22%) o Choice of patient (8%) | Single centre study, exclusion of trauma patients. Pre-defined list of criteria used to justify treatment limiting decisions limits the range of identifiable factors. |
Analysis of characteristics for patients in whom a WH/WD decision was made. | • Elderly (mean age 75 years) • Chronic disease (77%) o Cause of acute presentation in 56% of patients • Acute disease o Neurological (38%), cardiovascular (24%), respiratory (17%), digestive (14%), cancer (14%) • Severity of illness o Prognosis of underlying disease Fatal within 5 years (35%), fatal within 1 year (40%) o Organ system failure score of >3 (14%) o Mean SAPS score of 14 (indicating expected 30% mortality rate) • Functional limitation o None to moderate (42%), severe (53%) • 73% of patients judged unable to enter the decision making process | ||||
Sedillot, N. Holzapfel, L. Jacquet-Francillon, T. Tafaro, N. Eskandanian, A. Eyraud, S. Metton, P. P 2008 France | All adult patients admitted to a French general hospital ED in a one year period between 2004-2005 who did not already have a treatment limiting decision in place (98 patients – 1.5% of admission). | Prospective observational study. Pattern of treatment limitation chosen from a five step protocol ranging from no limitation to active withdrawal of life support. | Characteristics of patients in whom a WD/WH decision was made | • Elderly (mean age 82 years). • Chronic disease (95%) o Dementia (39%), cardiac insufficiency (34%), cancer (32)%, neurological disease (21%), COPD (6%), chronic renal failure (5%), psychiatric disorders (4%). • Acute organ failure was observed at admission in 82%. Physicians preferred choose a pattern of treatment limitation (83%) rather than treatment withdrawal as they were not seen as ethically equivalent. | Single centre study. Does not attempt to identify reasons for WD/WH life support. |
Le Conte, Philippe Riochet, David Batard, Eric Volteau, Christelle Giraudeau, Bruno Arnaudet, Idriss 2010 France | All patients who died in 174 EDs in France and Belgium over two 2-month periods in 2004/2005 were enrolled (n= 2512), 1907 of whom had a treatment WD/WH decision made. | Prospective cross-sectional survey. Physicians were required to justify WD/WH decisions from 9 predefined criteria. Patient characteristics were recorded, including whether a WD/WH decision was made. A logistic regression model for treatment limiting decisions was created. | Predefined criteria used to justify treatment limiting decision | • Mean of 3±3 criteria chosen per case. Neither ‘Expected quality of life unacceptably poor’ nor ‘age’ were ever chosen alone. o Principal acute presenting medical disorder (77%) o Irreversibility of acute disorder in the first 24h (54%) o Age (39%) o Previous functional limitation (38%) o Underlying chronic disease (35%) o Absence of improvement following active treatment (26%) o Recovery but expected quality of life unacceptably poor (25%) o Underlying disease expected to be fatal within 6 months (20%) o Level of care considered to be maximal (17%). | 37% of patients were transported to the ED by mobile intensive care units staffed by physicians. May limit transferability of findings to other systems. Seasonal variation of study population. Pre-defined list of criteria used to justify treatment limiting decisions limits the range of identifiable factors. |
Patient factors associated with level of care limitation | • Old age (71-81 OR 1.6, 81-88 OR 2.51, >88 OR 3.27). • Chronic disease o Immunodeficiency OR 1.9, liver disease OR 2.18, metastatic cancer OR 2.34. • Principal acute presenting disorder o Brain haemorrhage OR 2.62, neurologic OR 1.91, respiratory OR 1.61, cardiovascular OR 0.63, traumatic 0.34. • Severe functional limitation o Knauss C (OR 3.54) and Knauss D ( OR 5.84) • 92% of patients unable to enter decision making process. | ||||
Ethical arguments for limiting life support | Futility of care (57.6%), age (35.6%), physical pain (18.9%), psychological pain (11.1%), DNR order issued by patient or transmitted by relative (6.3%). | ||||
Rodriguez-Molinero, A. Lopez-Dieguez, M. Tabuenca, A. I. de la Cruz, J. J. Banegas, J. R. 2010 Spain | 101 randomly selected elderly patients (>80 or 65-79 with ≥ 2 comorbid conditions) admitted to the ED, and their respective physicians. Selected patients did not need intensive care treatment at the time of the study, which took place in 2003 over 5 months in 4 Spanish hospitals. | Cross-sectional study. Reasons underpinning WH/WD decisions were recorded via open-ended questionnaires. Patient cognitive/functional status was recorded. | Physician-reported factors taken into account during decision making | • Prior functional status (69%), • Age (42%), • Patient’s pathologic background (30%), • Current disease (18%), • Prior mental status (10%), • Subjective assessment of quality of life (4%), • Family or patient preferences (2%), • Social status (2%) • Moral considerations (1%). | Based on hypothetical events. Small sample size. Only ‘elderly’ population included. Large proportion of participating physicians were trainees. |
Patient factors associated with decisions to administer intensive treatment (CPR, ICU/CCU referral) | • Functional status as perceived by physician o (CPR administration OR 1.97, ICU/CCU referral OR 4.09/4.32) • Cognitive function as perceived by physician o (ICU referral OR 15.38) • Age o (ICU/CCU referral OR 0.86/0.76). | ||||
de Decker, L. Beauchet, O. Gouraud-Tanguy, A. Berrut, G. Annweiler, C. Le Conte, P. 2012 France | Data from LeConte et al. (2010) used. Exclusion criteria were age <65. N=2095 | Prospective cross-sectional survey. Post-hoc analysis of medical notes to calculate the Charlson Comorbidity Index (CCI)’s association with treatment WH/WD decisions. A logistic regression model for treatment limiting decisions was created. | Patient factors associated with a treatment limiting decision. | • Comorbidities o CCI ≥5 (OR 25.56), • Age o ≥ 85 (OR 20.00) • Haematological disease o (OR 6.92). • Factors found to be protective from treatment limiting decisions o Living in an institution (OR 0.15), having respiratory disease (OR 0.17), neurologic causes of organ failure (OR 0.2) | All included patients died in the ED introducing the potential for bias. CCI was a post-hoc calculation. |
Fassier, T. Valour, E. Colin, C. Danet, F. 2016 France | 15 ED physicians and 9 ICU physicians interviewed over a one year period in 2010 in France. Data was collected across 8 units in 2 hospitals | Qualitative study. Non-participant observations identified physicians making end-of-life decisions. They were subsequently interviewed and thematic analysis was carried out. | Patient factors | • Age o Physiologic age preserved/altered o Old age thresholds (<70, 70 to 80-85, >85) • Information on patient’s EOL preference o Presence/absence of information or advance directives • Family-related factors o Presence/absence of family, conflicts | May have limited transferability of results outside France due to legal/ethical/healthcare system differences, potentially leaving influential factors unexplored in interviews. |
Physician factors | • Experience and training in EOL decision making • Physician’s positive/negative age-related stereotypes of elderly • Physician’s familial experience of ageing | ||||
Time/resource factors | • Heterogeneous terminology and unclear acronyms in patient notes. • Unit-related factors o ED vs step-down vs short-stay units • Timing-related factors o Time available, handoffs, night/weekend shifts, leadership changes |