The objective of this quantitative secondary analysis study was to explore the relationship between hours worked per week and adverse events experienced by healthcare workers and patients. The sample size of participants consisted of 11,516 registered nurses from 188 Pennsylvania hospitals. Participants filled out a questionnaire that included questions about employment characteristics, work environments, job-related feelings, job characteristics, characteristics of their last shift worked, and demographic information. Results in this study proposed that the incidence of adverse events was greater with nurses that worked more than 40 hours per week, particularly errors in medication administration and needlestick injuries. It was suggested
