The number of attendances to major accident and emergency hospital departments in the NHS that were seen within 4 hours of arrival over twenty weeks.



A data frame with 20 rows and 3 variables:

  • i Week number.

  • r Attendances seen within 4 hours.

  • n Total number of attendances.


Mohammed MA, et al. Quality and Safety in Health Care 2013;22:362–368. doi: 10.1136/bmjqs-2012-001373 .