RT Journal Article SR Electronic T1 The effect of particular matter pollution on emergency room visits due to COPD and asthma and the association with hospitalization rate in Düzce City JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP P1046 VO 40 IS Suppl 56 A1 Ege Gulec Balbay A1 Peri Arbak A1 Oner Balbay A1 Ali Nihat Annakkaya YR 2012 UL http://erj.ersjournals.com/content/40/Suppl_56/P1046.abstract AB To investigate the effect of particuler matter levels on patients with COPD and asthma applied to emergency department and relation with hospitalization rate in Duzce city.Between January-December 2009, the patients diagnosed as COPD and asthma at State Hospital were retrospectively evaluated. The monthly average values of particulate matter obtained from the official data.61.4% of total 2499 cases were male. The average PM10 concentration of Duzce city was highest in November (184 mgr/m3) and was lowest in July (41 mgr/m3). The rates of COPD and asthma were 77.8 % and 22.2%, respectively. COPD rates in males and females were 85.1% and 66.4%, respectively. Asthma was observed in 33.6% of females while 14.9% of males were diagnosed as asthma (p=0.000). The admittance rates to the emergency department for females and males were 69.3% and 66.2%, respectively (p>0.05). The patients with COPD were frequently applied in winter (27.9%) while the patients diagnosed as asthma admitted in autumn (p=0.010). While particulate matter was over 100 μgr/m3, the odds ratios for COPD and asthma diagnosis were 1.039 (0.990-1.091) and 0.878 (0.749-1.029), respectively. Only the age was found an independent factor (β=-0,382, t=-20,645, p=0.000). COPD patients were older (r=-0,382, p=0,000). The factors independently effective on diagnosis according to univariate analysis were gender (R=10,664, F=65,182, P=0.000) and season (R=0,700, F=4,278, p=0.005).It seems that increase in PM10 concentration causes an increase in admission to emergency department with the diagnosis of asthma and COPD.