en سلامت محیط و کار Environmental and Occupational Health پژوهشي Research Article <span style="font-size:12pt"><span style="line-height:16.0pt"><span style="font-family:&quot;Times New Roman&quot;,serif"><b><i><span style="font-size:9.0pt">Background & Aims</span></i></b><b><span style="font-size:9.0pt">: </span></b><span style="font-size:9.0pt">Noise exposure can impact nurses&#39; performance and may result in disruptions to their tasks. This study aimed to examine the correlation between the average equivalent sound level and the occurrence of medication errors. </span></span></span></span><br> <span style="font-size:12pt"><span style="line-height:16.0pt"><span style="font-family:&quot;Times New Roman&quot;,serif"><b><i><span style="font-size:9.0pt">Materials & Methods</span></i></b><b><span style="font-size:9.0pt">:</span></b><span style="font-size:9.0pt"> This cross-sectional study involved 150 nurses in Iran in 2020. First, two medical and two surgical wards were randomly selected using a coin toss method. Second, the nurses who worked in those wards were sampled using the convenience method. Nurses&#39; medication errors were assessed using a questionnaire. A sound level meter was used to measure the sound level in decibel. Data were analyzed using analytical tests, including Kruskal-Wallis, Spearman correlation coefficient, and Poisson model.</span></span></span></span><br> <span style="font-size:12pt"><span style="line-height:16.0pt"><span style="font-family:&quot;Times New Roman&quot;,serif">&nbsp;<b><i><span style="font-size:9.0pt">Results</span></i></b><b><span style="font-size:9.0pt">:</span></b><span style="font-size:9.0pt"> The mean sound equivalent level in the cardio-respiratory internal ward (58.94 &plusmn; 1.88) was higher than the same level in the other internal and surgical wards (<i>p</i> < 0.001). An increase in the mean sound equivalent level in the wards was accompanied by an increase in the mean number of medication errors among unmarried individuals (e^0.22= 1.25), which was 1.25 times more than the errors made by married individuals. Finally, an increase in age and the mean sound equivalent level resulted in the occurrence of medication errors (<i>p</i> < 0.002). &nbsp;</span></span></span></span><br> <span style="font-size:12pt"><span style="line-height:16.0pt"><span style="font-family:&quot;Times New Roman&quot;,serif"><b><i><span style="font-size:9.0pt">Conclusion</span></i></b><b><span style="font-size:9.0pt">: </span></b><span style="font-size:9.0pt">The results showed that there was no relationship between the sound pressure level and nurses&rsquo; medication errors in the research environment. Therefore, it is necessary to conduct more studies to investigate the factors that increase the incidence of medication errors.</span></span></span></span><br> <span style="font-size:11pt"><span style="line-height:normal"><span calibri="" style="font-family:"><b><span style="font-size:12.0pt"><span style="font-family:"Times New Roman",serif"></span></span></b></span></span></span> Medication errors, Noise pollution, Nurse 1 10 http://hsm.umsu.ac.ir/browse.php?a_code=A-10-129-2&slc_lang=en&sid=1 Zeynab Shahmiri z.shahmiri67@gmail.com 10031947532846002238 10031947532846002238 No Department of medical surgical nursing, Kashan University of Medical Sciences, Kashan, Iran Fatemeh-Sadat Izadi-Avanji fs.izadi@gmail.com 10031947532846002239 10031947532846002239 No Associate professor, Department of medical surgical nursing, Kashan University of Medical Sciences, Kashan, Iran Ismail Azizi-Fini azizifinies@yahoo.com 10031947532846002240 10031947532846002240 Yes Associate professor, Trauma Nursing Research Center, Kashan University of Medical Sciences, Kashan, Iran Abbas Bahrami adibi1344@yahoo.com 10031947532846002241 10031947532846002241 No Department of Occupational Health, Faculty of Health, Kashan University of Medical Sciences Fatemeh Atoof atoof@alumnus.tums.ac.ir 10031947532846002242 10031947532846002242 No Ph.D of biostatical, Department of Biostatical, Faculty of Health, Kashan University of medical science, Kashan, Iran