Medication omission rates in New Zealand Residential Aged Care Homes: a national description
Abstract Background Medication administration is a key service offered to individuals residing in residential aged care homes (RAC homes). A medication omission is an event where a prescribed medication is not taken by a resident before the next scheduled dose. Medication omissions are typically classed as errors, they have the potential to lead to harm if poorly managed, but may also stem from good clinical decision-making. Studies that critically appraise or support medication omissions in healthcare settings are limited. There is uncertainty around which medication omissions are problematic and how many on average a patient should experience. There have been several hospital-based studies, with limited sample sizes, timeframes, and inconsistent reporting of omissions. As the first population-level, RAC Home-specific study of its kind, this study quantifies the incidence, prevalence, and types of medication omissions in RAC homes on a national scale. Methods A retrospective review of de-identified, medication administration e-records from December 1 st 2016 to December 31 st 2017 was conducted. Demographic details of residents, care staff competency levels, medications, and RAC ownership types were included in the review and analysis. Results A total of 11, 015 residents from 374 RAC homes had active medication charts; 8,020 resided in care over the entire data collection period. A mean rate of 3.40 medications doses were omitted per 100 dispensed medications doses per resident (s.d. 7.27). Approximately 73% of residents had at least one dose omission. The most common selected omission category was ‘not-administered’ (49.9%), followed by ‘refused’ (34.6%). The mean rate of omission was found to be slightly higher in corporate operated RAC Homes (3.73 versus 3.33), with greater variation. The most commonly omitted medications were Analgesics and Laxatives. Forty-eight percent of all dose omissions were recorded without a comment justifying the omission. Conclusions Compared to other studies medication omissions within RAC homes in New Zealand are not as common as previously proposed. This study sets out the first national-level rate of medication omissions per resident over a one-year timeframe. Subsequent studies will address the medications omitted, the clinical significance of omissions and the place of medication omissions within clinical decision-making.