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. 2020 Mar;52(3):608-615.
doi: 10.1249/MSS.0000000000002178.

Exertional Rhabdomyolysis: A Retrospective Population-based Study

Marianne T Luetmer  1 , Brennan J Boettcher  2 , John M Franco  3 , Jacob H Reisner  4 , Andrea L Cheville  1 , Jonathan T Finnoff  1
Affiliations

Exertional Rhabdomyolysis: A Retrospective Population-based Study

Marianne T Luetmer et al. Med Sci Sports Exerc. 2020 Mar.

Abstract

Purpose: This study aimed to evaluate the incidence and characteristics of exertional rhabdomyolysis (ER) in a population-based cohort.

Methods: A retrospective cohort study was performed in Olmsted County, Minnesota, from 2003 to 2015. Incident ER cases were ascertained through the Rochester Epidemiology Project medical record linkage system through electronic searches of the International Classification of Diseases, Ninth Revision, codes and clinical note text. Population incidence rate was calculated using the corresponding Rochester Epidemiology Project census populations specific to calendar year and sex. Descriptive statistics were used.

Results: Of the 430 patients, 431 cases met the inclusion criteria for rhabdomyolysis; 4.9% of cases (n = 20; males n = 18; Caucasian n = 17) were ER, with one recurrence. There were no deaths secondary to ER. The age- and sex-adjusted incidence rate of ER was 1.06 ± 0.24 (95% confidence interval = 0.59-1.52) per 100,000 person-years. Endurance activity (n = 7), manual labor (n = 5), and weight lifting (n = 4) were common causes. Complications included kidney injury (n = 5), mild electrolyte abnormalities (n = 10), elevated transaminases (n = 12), and minor electrocardiographic abnormalities (n = 4). A majority of patients were hospitalized (n = 16) for a median of 2 d, had mild abnormalities in renal and liver function and electrolytes, and were discharged without sequelae.

Conclusion: ER in the civilian population occurs at a much lower incidence than the military population. The most common causes were endurance exercise, manual labor, and weight lifting. The majority of cases were treated conservatively with intravenous fluid resuscitation during a brief hospital stay, and all were discharged without sequela. Only one case of recurrence occurred in this cohort, indicating the recurrence rate was low.

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Figures

Figure 1.
Figure 1.
Flow diagram of patients eligible for inclusion in this study. CK = Creatine Kinase
Figure 2.
Figure 2.
Graph depicting the identified cases of exertional rhabdomyolysis sorted for age at presentation (y axis) vs year of incident case (x axis). ER = Exertional Rhabdomyolysis.
See this image and copyright information in PMC

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