Abstract
Purpose
To identify the prognostic factors associated with mortality in heat-related illness.
Methods
Multi-center observational cohort-study in 16 emergency departments (ED) belonging to the teaching hospital network of the Paris area. The cohort comprised all patients admitted to one of the EDs during the August 2003 heat wave in Paris and having a core temperature >38.5°C. Baseline clinical and biological data in ED, patient’s course and 1-year survival rate were recorded. Potential prognostic factors associated with death were assessed by Cox proportional-hazards analysis.
Results
A total of 1,456 patients were included. Mean age was 79 ± 19 years. Critically ill conditions were noted in 391 patients (27%), but only 72 (5%) were admitted into an intensive care unit. The survival rate was 57% at 1 year as compared to an expected 90% (P < 0.001). Nine independent prognostic factors were identified: previous treatment with diuretics, living in an institution, age >80 years, cardiac disease, cancer, core temperature >40°C, systolic arterial pressure <100 mmHg, Glasgow coma scale <12 and transportation to hospital by ambulance. We defined three risk groups: low, intermediate and high risk, with a 1-year survival rate of 85, 61 and 18%, respectively.
Conclusions
We observed a low survival rate and developed a risk score based on easily obtained variables that may be useful to clinicians managing casualties from future heat waves.
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Acknowledgments
We are indebted to Emmanuelle de Magondeau and Christine Lanau for their excellent data monitoring and management. We thank Dr. David J. Baker, DM, FRCA (Department of Anesthesiology, CHU Necker-Enfants Malades, Paris, France) for reviewing the manuscript and Prof. Paul Landais, MD, PhD (Department of Biostasistics, CHU Necker-Enfants Malades, France) and Yannick Le Manach (Department of Anesthesiology and Critical Care, CHU Pitié-Salpêtrière, Paris, France) for statistical advice. The study was supported by the Direction Régionale de la Recherche Clinique d’Ile de France (Paris, France), grant no. CRC 03-150.
Conflict of interest statement
The authors declare that they have no conflict of interest.
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The other investigators in the study are listed in the Appendix.
An erratum to this article can be found at http://dx.doi.org/10.1007/s00134-009-1728-5
Appendix
Appendix
The other investigators were (in alphabetical order): Joëlle Benkel (CHU Jean Verdier, Bondy), Dominique Brun-Ney, MD (CHU Ambroise Paré, Boulogne, currently the Direction de la Politique Médicale, Assistance Publique-Hôpitaux de Paris), Enrique Casalino, MD, PhD (CHU Bicêtre, Le Kremlin-Bicêtre, currently CHU Bichat and Université Denis Diderot-Paris 7), Alain Davido (Hôpital Européen Georges Pompidou, Paris), MD, Jean-François Dhainaut, MD (CHU Cochin-St Vincent de Paul and Université René Descartes-Paris 5, currently the Agence de l’Evaluation de la Recherche et de l’Enseignement Supérieur, Paris, France), David Elkharrat, MD (CHU Lariboisière, Paris, currently CHU Ambroise Paré, Boulogne, and Université Paris Ouest), Anika Fichelle (CHU Bichat Claude-Bernard, Paris), M.D., Bertrand Galichon MD (CHU Lariboisière, Paris), Christine Ginsburg, MD, (CHU Cochin-St Vincent de Paul, Paris), Philippe Héricord MD (CHU Saint Antoine, Paris), Philippe Hoang, MD (deceased) (CHU Avicenne, Bobigny), Côme Légaut, MD, (CHU Antoine Béclère, Clamart), Virginie Lemiale, MD (CHU Henri Mondor, Créteil), Jafar Manamani, MD (CHU Saint Louis, Paris, currently CHU Saint Antoine, Paris), Alice Marichez, MD, and Dominique Meyniel, MD (CHU Tenon, Paris), Dominique Pateron, MD, PhD (CHU Jean Verdier, Bondy, currently CHU Saint-Antoine and Université Pierre et Marie Curie-Paris 6), Florence Péviriéri, MD (CHU Jean Verdier, Bondy), Jean-Louis Pourriat, MD (CHU Hôtel Dieu, Paris and Université René Descartes-Paris 5), Bertrand Renaud, MD (CHU Henri Mondor, Créteil), Pierre Taboulet, MD (CHU Saint Louis, Paris), Stéphane Wadjou, MD, (CHU Pitié-Salpêtrière, Paris), Patrick Werner MD (CHU Beaujon, Clichy); all in emergency departments of Assistance Publique-Hôpitaux de Paris, Paris, France.
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Hausfater, P., Megarbane, B., Dautheville, S. et al. Prognostic factors in non-exertional heatstroke. Intensive Care Med 36, 272–280 (2010). https://doi.org/10.1007/s00134-009-1694-y
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DOI: https://doi.org/10.1007/s00134-009-1694-y