Finding the time: Hourly variation in average daily census on a hospital medicine service

Monitoring the average daily census (ADC) is crucial for managing patient flow and allocating resources. This study analyzed hourly fluctuations in the ADC on a hospital medicine service at an academic medical center. Data from 8342 encounters and 6178 unique patients were collected over a year. The ADC peaked at 11 a.m. (164.1 patients/day) and was lowest at 7 p.m. (155.0 patients/day), accounting for a variation of up to 9.1 patients (5.5% of peak census) depending on the time of day the measurement was taken. Understanding how ADC changes throughout the day will help hospital medicine programs to partner with administrators to optimize resource allocation and staffing. Measuring ADC at midnight, as traditionally done, may underestimate workload and therefore contribute to staffing shortages and physician burnout. Hospitals should consider measuring ADC at its peak, between 7 a.m. and 11 a.m., to ensure adequate staffing and high-quality patient care.