Medical Journal of the Islamic Republic Of Iran
مجله پزشکی جمهوری اسلامی ایران
Med J Islam Repub Iran
Medical Sciences
http://mjiri.iums.ac.ir
2
journal2
1016-1430
2251-6840
8
10.18869/mjiri
14
8888
13
en
jalali
1396
11
1
gregorian
2018
2
1
32
1
online
1
fulltext
en
Short-term effects of air pollution on respiratory mortality in Ahvaz, Iran
Epidemiology
Epidemiology
Original Research
Original Research
<p><strong>Background: </strong>Urban air pollutants may affect respiratory mortality. This study was conducted to investigate this effect in Ahvaz, one of the most polluted cities in the world.<br>
<strong>Methods:</strong> The impact of 7 major air pollutants including O<sub>3</sub>, PM<sub>10</sub>, NO<sub>2</sub>, CO, and SO<sub>2</sub> were evaluated on respiratory mortality in different gender and age groups using a quasi-Poisson, second degree polynomial constrained, distributed lag model, with single and cumulative lag structures adjusted by trend, seasonality, temperature, relative humidity, weekdays, and holiday. Data were analyzed using the dlnm package in R x64 3.2.5 software. Significance level was set at less than 0.05.<br>
<strong>Results: </strong>In adjusted models, for each IQR increase of O<sub>3</sub> in the total population, the risk ratio (RR) for respiratory deaths in 0 to 14- day lags was, respectively, 1.009 (95% CI:1.001-1.016) and 1.009 (95% CI:1.002-1.017), and it was 1.021 (95% CI: 1.002-1.040) in cumulative 0 to 14- day lags. For PM<sub>10</sub>, in the total population and in adjusted models after 0 to 14- day lags and in cumulative lags of 0 to 14 for an IQR increase in the mean concentration of PM<sub>10</sub>, the RR for respiratory deaths increased significantly and was, respectively, 1.027 (95% CI:1.002-1.051), 1.029 (95% CI:1.006-1.052), and 1.065 (95% CI:1.005-1.128). NO<sub>2</sub> showed a significant association with respiratory deaths only in the 18 to 60 year- old age group and in 9- day lags (RR= 1.318, 95% CI:1.002-1.733). Finally, the results showed that for an IQR increase in the mean concentration of CO and SO<sub>2</sub>, the adjusted RR for respiratory deaths in 9- day lags in the total population was, respectively, RR= 1.058 (95% CI:1.008-1.111) and 1.126 (95% CI:1.034-1.220). <br>
<strong>Conclusion: </strong>Air pollution in Ahvaz is probably causing increased respiratory mortality.<br>
<br>
</p>
Short-term effects, Air pollution, Respiratory mortality, Ahvaz
173
181
http://mjiri.iums.ac.ir/browse.php?a_code=A-10-922-8&slc_lang=en&sid=1
Maryam
Dastoorpoor
mdastoorpour@yahoo.com
200319475328460037497
200319475328460037497
No
Neurology Research Center, Kerman University of Medical Sciences, Kerman, Iran.
Narges
Khanjani
nkhanjani@kmu.ac.ir
200319475328460037498
200319475328460037498
No
Environmental Health Engineering Research Center, Kerman University of Medical Sciences, Kerman, Iran.
Abbas
Bahrampour
200319475328460037499
200319475328460037499
No
Physiology Research Center, Kerman University of Medical Sciences, Kerman, Iran.
Gholamreza
Goudarzi
gh.goodarzi@ajums.ac.ir
200319475328460037500
200319475328460037500
No
Air Pollution and Respiratory Diseases Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran & Environmental Technologies Research Center (ETRC), Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
Hamidreza
Aghababaeian
hamidrezaaghababaeian@yahoo.com
200319475328460037501
200319475328460037501
No
Nursing and Emergency Department, Dezful University of Medical Sciences, Dezful, Iran.
Esmaeil
Idani
esmaileidani@gmail.com
200319475328460037502
200319475328460037502
Yes
Air Pollution and Respiratory Diseases Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.