The purpose of this article is to analyse the correlation of air quality data with the number of emergency medical interventions and the number of patient visits to emergency clinic of the Integrated Emergency Hospital Admission (Croatian acronym: OHBP).The analysis was conducted on data regarding Slavonski Brod (Croatia) from 1 January to 31 August 2016, obtained from: (1) System eHitna -emergency medical services interventions (2) Patients' visit to OHBP-General Hospital Slavonski Brod (3) Environmental Protection Agency data regarding air quality for PM2.5, PM10 and H 2 S per day. The number of interventions ranged from 103 to 260 (M = 151), and the number of patients from 90 to 250 per day (M = 133). Overall the number of interventions was 37,482, and overall number of patients 32,757. The values of PM2.5 ranged from 1.73 to 500.11 µg/m 3 (M = 18.70), values of PM10 ranged from 3.17 to 520.21 µg/m 3 (M = 25.55), and values of H2S ranged from 0.62 to 12.43 µg/m 3 (M = 1.49).The values of PM2.5, PM10 and H2S have been analysed also depending on the limit values (25 µg/m 3 for PM2.5, 50 µg/m 3 for PM10 and 5 µg/m 3 for H2S).The values were within the limit values for PM2.5 in 64% of days, in 80% of days for PM10 and in 93% of days for H2S.There was a statistically significant weak correlation (r S = 0.333, p < 0.05) between PM2.5 and the number of patients per day, weak correlation (r S = 0.334, p < 0.05) between PM10 and the number of patients per day and a weak correlation (r S = 0.171, p < 0.05) between H2S and the number of patients per day.There was a statistically significant difference in the number of patients who were provided with medical assistance in the day depending on the values of PM2.5 (p < 0.001) and PM10 (p < 0.001), while for H2S the significance was borderline (p = 0.051).

The purpose of the paper is to analyze the data of air quality in the area of Slavonski Brod and Nova Gradiška and to test the differences between the groups of respondents in 2016 and 2017. According to the "wind indicators", the areas of exposure to polluted air were defined as "less exposed" (438 subjects), "exposed" (450) from Slavonski Brod and "non-exposed area" (286) from town Nova Gradiska. Differences in categorical indicators between groups were calculated by the hi-squared test. Research has shown statistically significant difference in the characteristics of "How healthy is your environment?" (2017) (unexposed subjects, p=0.042) and "Do you believe that polluted air harms your health?" (2017) (less exposed subjects, p=0.01), ie, a significant difference was found in additional features of air-odor/stench, soot or smoke, smog and dust (p<0.001).There were also statistically significant differences in the characteristics "assessment of quality of life" (p=0.027), "environmental health" (p<0.001) and "harmfulness of polluted air on health" (p<0.001) ("exposed" and "nonexposed" group). Due to limited size of research sample and its frequency of certain individual states and phenomena, strength of research tests in some cases may be limited due to that fact, and therefore these research results should be interpreted with some caution.

Air pollution is a big public health problem. Short term and long-term exposure to air pollutants have different health effects. The purpose of this research is to determine whether PM10, PM2.5, H2S and meteorological parameters have impact on frequency of urgent interventions in ERs (