TY - JOUR
T1 - Physiological Equivalent Temperature Index and mortality in Tabriz (The northwest of Iran)
AU - Sharafkhani, Rahim
AU - Khanjani, Narges
AU - Bakhtiari, Bahram
AU - Jahani, Yunes
AU - Sadegh Tabrizi, Jafar
PY - 2018/1/1
Y1 - 2018/1/1
N2 - There are few epidemiological studies about climate change and the effect of temperature variation on health using human thermal indices such as the Physiological Equivalent Temperature (PET) Index in Iran. This study was conducted in Tabriz, the northwest of Iran and Distributed Lag Non-linear Models (DLNM) combined with quasi-Poisson regression models were used to assess the impacts of PET on mortality by using the DLNM Package in R Software. The effect of air pollutants, time trend, day of the week and holidays were controlled as confounders. There was a significant relation between high (30 °C, 27 °C) and low (−0.8 °C, −9.2 °C and −14.2 °C) PET and total (non-accidental) mortality; and a significant increase in respiratory and cardiovascular deaths in high PET values. Heat stress increased Cumulative Relative Risk (CRR) for total (non-accidental), respiratory and cardiovascular mortality significantly (CRR Non Accidental Death, PET=30 °C, lag 0–30=1.67, 95%CI: 1.31–2.13; CRR Respiratory Death, PET=30 °C, lag 0–13=1.88, 95%CI: 1.30–2.72; CRR Cardiovascular Death, PET=30 °C, lag0-30=1.67 95%CI: 1.16–2.40). Heat stress increases the risk of total (non-accidental), respiratory mortality, but cold stress decreases the risk of total (non-accidental) mortality in Tabriz which is one of the cold cities of Iran.
AB - There are few epidemiological studies about climate change and the effect of temperature variation on health using human thermal indices such as the Physiological Equivalent Temperature (PET) Index in Iran. This study was conducted in Tabriz, the northwest of Iran and Distributed Lag Non-linear Models (DLNM) combined with quasi-Poisson regression models were used to assess the impacts of PET on mortality by using the DLNM Package in R Software. The effect of air pollutants, time trend, day of the week and holidays were controlled as confounders. There was a significant relation between high (30 °C, 27 °C) and low (−0.8 °C, −9.2 °C and −14.2 °C) PET and total (non-accidental) mortality; and a significant increase in respiratory and cardiovascular deaths in high PET values. Heat stress increased Cumulative Relative Risk (CRR) for total (non-accidental), respiratory and cardiovascular mortality significantly (CRR Non Accidental Death, PET=30 °C, lag 0–30=1.67, 95%CI: 1.31–2.13; CRR Respiratory Death, PET=30 °C, lag 0–13=1.88, 95%CI: 1.30–2.72; CRR Cardiovascular Death, PET=30 °C, lag0-30=1.67 95%CI: 1.16–2.40). Heat stress increases the risk of total (non-accidental), respiratory mortality, but cold stress decreases the risk of total (non-accidental) mortality in Tabriz which is one of the cold cities of Iran.
KW - Mortality
KW - Physiological Equivalent Temperature
KW - Temperature
KW - Thermal indices
KW - Thermal stress
UR - http://www.scopus.com/inward/record.url?scp=85035782580&partnerID=8YFLogxK
U2 - 10.1016/j.jtherbio.2017.11.012
DO - 10.1016/j.jtherbio.2017.11.012
M3 - Article
C2 - 29301690
AN - SCOPUS:85035782580
VL - 71
SP - 195
EP - 201
JO - Journal of Thermal Biology
JF - Journal of Thermal Biology
SN - 0306-4565
ER -