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Number of Hours Worked Per WeekAbbreviations: ARN, anesthesia registered nurse; CRNA, Certified Registered Nurse Anesthetist.- 5. Anesthetic Cases Performed per WeekAbbreviations: ARN, anesthesia registered nurse; CRNA, Certified Registered Nurse Anesthetist.over age 50. Within the next 10 years, 68.3% of the CRNAs say they plan to retire. Of these, 29.4% plan to retire by the end of 2020. As the CRNA workforce ages, many plan to retire. The age and retirement data are different for ARNs. Of the respondents, 86.5 of the ARNs are under 40 years of age. However, while the average age is younger than that of CRNAs, 72% of ARN respondents say they plan to retire within the next 10 years (-s 2 and 3).Both CRNAs and ARNs are likely to work more than the normal 40-hour workweek. For ARNs, 60.3% work 41 to 50 hours per week, 9.2% work 51 to 60 hours, and 2.8% work more than 61 hours per week. For CRNAs, 42.1% work 41 to 50 hours per week, 17.5% work 51 to 60 hours, and 7.1% work more than 61 hours (- 4). On average, ARNs performed less than 20 cases per week (42.6%). Similarly, 42.9% of CRNA respondents reported performing fewer than 20 cases per week. -s 5 and 6 provide more specific information about the details of nurse anesthesia workload reported by respondents and the components of practice.Chi-square analysis (2 Ă— 2 -s) was conducted for 10 components of nurse anesthesia practice. Of those 10 components, 9 demonstrated statistically significant dif-ferences between CRNA and ARN respondents (- 2, - 6).Finally, a Kruskal-Wallis test was conducted to locate differences in work satisfaction between the 2 groups. There was a statistically significant difference in work sat-isfaction between CRNAs and ARNs (H (1) = 22.515, P <.01) with a mean rank of 109.07 (median = 3) for ARNs and a mean rank of 150.38 (median = 4) for CRNAs (- 7).www.aana.com/aanajournalonline AANA Journal n October 2017 n Vol. 85, No. 5 365- 6. Performance of Components of AnesthesiaAbbreviations: ARN, anesthesia registered nurse; CRNA, Certified Registered Nurse Anesthetist.A. Pre-anesthetic assessmentB. Obtain anesthesia consentC. Consult with physicians when making an anesthetic planD. Prepare and check anesthetic drugs, supplies, and anesthesia machine E. Inject anesthetic drugs during inductionF. Insert endotracheal tube or laryngeal mask airwayG. Management of emergence from anesthesia and decision to remove airway devices H. Postanesthesia airway and pain managementI. Perform regional block (spinal, epidural, nerve blocks)J. Documentation of anesthesia recordDiscussionThe practices of CRNAs and ARNs in South Korea dem-onstrate important differences that are likely the result of different levels of nurse anesthesia education and train-ing. We have identified those practice components that are statistically significantly different and are related to the sophistication of clinical judgment and reasoning during the provision of care to individuals. The ARNs use more dependent-level skills, tasks, and judgments during the care they provide than do the CRNAs.