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Predictors of death and new disability after critical illness: a multicentre prospective cohort study

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Abstract

Purpose

This study aimed to determine the prevalence and predictors of death or new disability following critical illness.

Methods

Prospective, multicentre cohort study conducted in six metropolitan intensive care units (ICU). Participants were adults admitted to the ICU who received more than 24 h of mechanical ventilation. The primary outcome was death or new disability at 6 months, with new disability defined by a 10% increase in the WHODAS 2.0.

Results

Of 628 patients with the primary outcome available (median age of 62 [49–71] years, 379 [61.0%] had a medical admission and 370 (58.9%) died or developed new disability by 6 months. Independent predictors of death or new disability included age [OR 1.02 (1.01–1.03), P = 0.001], higher severity of illness (APACHE III) [OR 1.02 (1.01–1.03), P < 0.001] and admission diagnosis. Compared to patients with a surgical admission diagnosis, patients with a cardiac arrest [OR (95% CI) 4.06 (1.89–8.68), P < 0.001], sepsis [OR (95% CI) 2.43 (1.32–4.47), P = 0.004], or trauma [OR (95% CI) 6.24 (3.07–12.71), P < 0.001] diagnosis had higher odds of death or new disability, while patients with a lung transplant [OR (95% CI) 0.21 (0.07–0.58), P = 0.003] diagnosis had lower odds. A model including these three variables had good calibration (Brier score 0.20) and acceptable discriminative power with an area under the receiver operating characteristic curve of 0.76 (95% CI 0.72–0.80).

Conclusion

Less than half of all patients mechanically ventilated for more than 24 h were alive and free of new disability at 6 months after admission to ICU. A model including age, illness severity and admission diagnosis has acceptable discriminative ability to predict death or new disability at 6 months.

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Data availability

Partial data set sharing according to individual requests for data access. Requests will be considered by the study's Management Committee. Requests for data sharing to be made to anzicrc@monash.edu and the corresponding author, carol.hodgson@monash.edu.

Code availability

Statistical code is available on request to anzicrc@monash.edu and the corresponding author, carol.hodgson@monash.edu.

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Acknowledgement

PREDICT Management Committee: C.L. Hodgson (Chair), M. Bailey, J.Barrett, R. Bellomo, D.J. Cooper, B.J. Gabbe, A.M. Higgins, N. Linke, P.S. Myles, M. Paton, S. Philpot, M. Shulman, M. Young

PREDICT Site Investigators (alphabetically by institution and all in Victoria, Australia): Alfred Hospital – K. Collins, D.J. Cooper, B. Jomon, R. Thompson, M. Young; Austin Hospital - R. Bellomo, M. Cousinery, G. Eastwood, R. Robbins; Cabrini Hospital - S. Philpot; S. Simpson; Dandenong Hospital – M. Paton; Epworth Hospital - J.Barrett; G. Hanlon; Monash Medical Centre - M. Paton, Y. Shehabi, C. Walker.

PREDICT Outcome Assessors (alphabetically): School of Public Health and Preventive Medicine, Monash University - P.Buckingham, L. Marsh, D. Sandler

PREDICT Coordinating Centre Staff: The Australian and New Zealand Intensive Care Research Centre (ANZIC-RC), School of Public Health and Preventive Medicine, Monash University, Melbourne - M. Bailey, D.J. Cooper, A.M. Higgins, C. Hodgson, N. Linke, B. Fulcher, A. Serpa Neto.

Funding

The PREDICT Study was funded by the National Health and Medical Research Council of Australia (GNT1132976). Professor Hodgson is supported by a Heart Foundation Fellowship and a National Health and Medical Research Council Investigator Grant (GNT1173271). Professor Gabbe is supported by an Australian Research Council Future Fellowship (FT170100048). The funding agencies had no role in the design and conduct of the study; collection, management, analysis and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.

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AMH, ASN and CLH had full access to all of the data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis. Concept and design: AMH, CLH, MB, JB, RB, DJC, BJG, PSM, SP, MS. Acquisition, analysis, or interpretation of data: AMH, CLH, ASN, MB, JB, RB, DJC, BJG, NL, PSL, MP, SP, MS, MY. Drafting of the manuscript: AMH, CLH, ASN, MB. Critical revision of the manuscript for important intellectual content:  AMH, CLH, ASN, MB, JB, RB, DJC, BJG, NL, PSL, MP, SP, MS, MY. Statistical analysis: AMH, ASN, MB. Obtained funding: AMH, CLH, MB, RB, DJC, PSM, MS. Administrative, technical, or material support: AMH, CLH, ASN, NL. Supervision: CLH, RB, DJC, BJG, PSM, MS.

Corresponding author

Correspondence to C. L. Hodgson.

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Ethics committee approval, including a waiver of consent for hospital data collection and opt-out consent for follow-up, was obtained at each site.

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The members of the PREDICT study group are listed in the Acknowledgement Section

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Higgins, A.M., Neto, A.S., Bailey, M. et al. Predictors of death and new disability after critical illness: a multicentre prospective cohort study. Intensive Care Med 47, 772–781 (2021). https://doi.org/10.1007/s00134-021-06438-7

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