Daily Mean Temperature Affects Urolithiasis Presentation in Seoul: a Time-series Analysis
Journal of Korean Medical Science
;
: 750-756, 2016.
Article
in English
| WPRIM
| ID: wpr-11694
ABSTRACT
This study aimed to investigate the overall cumulative exposure-response and the lag response relationships between daily temperature and urolithiasis presentation in Seoul. Using a time-series design and distributing lag nonlinear methods, we estimated the relative risk (RR) of urolithiasis presentation associated with mean daily temperature, including the cumulative RR for a 20 days period, and RR for individual daily lag through 20 days. We analyzed data from 14,518 patients of 4 hospitals emergency department who sought medical evaluation or treatment of urolithiasis from 2005-2013 in Seoul. RR was estimated according to sex and age. Associations between mean daily temperature and urolithiasis presentation were not monotonic. Furthermore, there was variation in the exposure-response curve shapes and the strength of association at different temperatures, although in most cases RRs increased for temperatures above the 13℃ reference value. The RRs for urolothiasis at 29℃ vs. 13℃ were 2.54 in all patients (95% confidence interval [CI] 1.67-3.87), 2.59 in male (95% CI, 1.56-4.32), 2.42 in female (95% CI, 1.15-5.07), 3.83 in male less than 40 years old (95% CI, 1.78-8.26), and 2.47 in male between 40 and 60 years old (95% CI, 1.15-5.34). Consistent trends of increasing RR of urolithiasis presentation were observed within 5 days of high temperatures across all groups. Urolithiasis presentation increased with high temperature with higher daily mean temperatures, with the strongest associations estimated for lags of only a few days, in Seoul, a metropolitan city in Korea.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Temperature
/
Time Factors
/
Sex Factors
/
Risk
/
Regression Analysis
/
Databases, Factual
/
Age Factors
/
Emergency Service, Hospital
/
Urolithiasis
/
Republic of Korea
Type of study:
Diagnostic study
/
Etiology study
Limits:
Adult
/
Aged
/
Female
/
Humans
/
Male
Country/Region as subject:
Asia
Language:
English
Journal:
Journal of Korean Medical Science
Year:
2016
Type:
Article
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