Problem: Which of the following is not a measure used in the staffing domain of the Five-Star Quality Rating System? Need Assignment Help? Case-mix adjusted total nursing hours per resident day for a quarter averaged across all days (weekdays and weekends). Case-mix adjusted certified nurse aide hours per resident day for a quarter averaged across all days (weekdays and weekends). Case-mix adjusted RN hours per resident day for a quarter, averaged across all days (weekdays and weekends). Case-mix adjusted total nursing hours per resident day for a quarter averaged across all weekend days (Saturdays and Sundays).