Michael Ordon1,2, Blayne Welk2,3,4, Qiongsi Li5, Jun Wang5, Eric Lavigne6,7, Abderrahmane Yagouti8, Ray Copes5,9, Sabit Cakmak10, Hong Chen2,5,9. 1. 1 Division of Urology, Department of Surgery, St. Michael's Hospital, University of Toronto , Toronto, Ontario, Canada . 2. 2 Institute for Clinical Evaluative Sciences , Toronto, Ontario, Canada . 3. 3 Division of Urology, Department of Surgery, St. Joseph's Health Care, Western University , London, Ontario, Canada . 4. 4 Department of Epidemiology and Biostatistics, Schulich School of Medicine and Dentistry, Western University , London, Ontario, Canada . 5. 5 Public Health Ontario , Toronto, Ontario, Canada . 6. 6 Air Health Science Division, Health Canada , Ottawa, Ontario, Canada . 7. 7 School of Epidemiology, Public Health and Preventive Medicine, University of Ottawa , Ontario, Canada . 8. 8 Climate Change and Health Office, Health Canada , Ottawa, Ontario, Canada . 9. 9 Dalla Lana School of Public Health, University of Toronto , Toronto, Ontario, Canada . 10. 10 Population Studies Division, Health Canada , Ottawa, Ontario, Canada .
Abstract
PURPOSE: To examine the impact of ambient temperature on the incidence of emergency department (ED) admissions for acute renal colic and the potential influence demographics and comorbid conditions may have on this. METHODS: We conducted a population-based time series analysis using linked healthcare databases in Ontario, Canada, which included all residents, aged ≥19 years, who were admitted to an ED from April 2002 to December 2013. The primary outcome was daily number of renal colic emergency department admissions. A distributed lag nonlinear model with 21 days of lag was applied to estimate the cumulative effect of temperature on colic admissions. We estimated risks for cold and heat, defined as temperatures below and above the optimal temperature, which corresponded to the point with minimum risk of colic admissions. We conducted stratified analyses using selected demographics and comorbidities. RESULTS: During the study period, 423,396 patients presented to an ED with colic. There was a significantly increased risk of colic as ambient temperature increased (rate ratio [RR] = 1.30, 95% confidence interval [CI]: 1.20, 1.42). Subgroup analysis demonstrated an increased risk associated with heat for both genders; however, this risk was more pronounced in males with extreme heat (RR = 1.64 vs 1.22, p = 0.006). In contrast to other age groups, there was an increased risk for those in their 40s (RR = 1.42), 50s (RR = 1.54), and 60s (RR = 1.31) (p = 0.02). CONCLUSION: Increasing ambient temperature was associated with increased risk of ED visits for colic, particularly in males and those aged 40 to 69 years.
PURPOSE: To examine the impact of ambient temperature on the incidence of emergency department (ED) admissions for acute renal colic and the potential influence demographics and comorbid conditions may have on this. METHODS: We conducted a population-based time series analysis using linked healthcare databases in Ontario, Canada, which included all residents, aged ≥19 years, who were admitted to an ED from April 2002 to December 2013. The primary outcome was daily number of renal colic emergency department admissions. A distributed lag nonlinear model with 21 days of lag was applied to estimate the cumulative effect of temperature on colic admissions. We estimated risks for cold and heat, defined as temperatures below and above the optimal temperature, which corresponded to the point with minimum risk of colic admissions. We conducted stratified analyses using selected demographics and comorbidities. RESULTS: During the study period, 423,396 patients presented to an ED with colic. There was a significantly increased risk of colic as ambient temperature increased (rate ratio [RR] = 1.30, 95% confidence interval [CI]: 1.20, 1.42). Subgroup analysis demonstrated an increased risk associated with heat for both genders; however, this risk was more pronounced in males with extreme heat (RR = 1.64 vs 1.22, p = 0.006). In contrast to other age groups, there was an increased risk for those in their 40s (RR = 1.42), 50s (RR = 1.54), and 60s (RR = 1.31) (p = 0.02). CONCLUSION: Increasing ambient temperature was associated with increased risk of ED visits for colic, particularly in males and those aged 40 to 69 years.
Entities:
Keywords:
comorbidity; demography; nephrolithiasis; renal colic; temperature
Authors: Ana M Vicedo-Cabrera; David S Goldfarb; Robert E Kopp; Lihai Song; Gregory E Tasian Journal: Urolithiasis Date: 2019-03-21 Impact factor: 3.436
Authors: Kathleen E McLean; Rebecca Stranberg; Melissa MacDonald; Gregory R A Richardson; Tom Kosatsky; Sarah B Henderson Journal: Int J Environ Res Public Health Date: 2018-09-19 Impact factor: 3.390