Mean number of patients in the department at the start of the night shift
| Middle-grade night (95% CI) | Consultant night (95% CI) | |
| Total | 21.7 (20.7 to 22.8) | 20.4 (17.4 to 23.3) |
| Under 16 years of age | 5.6 (5.0 to 6.1) | 4.5 (3.4 to 5.7) |
| Over 65 years of age | 3.7 (3.4 to 4.0) | 3.3 (2.5 to 4.1) |
| Ambulance arrivals age 16–65 years | 3.6 (3.3 to 3.9) | 3.9 (3.0 to 4.7) |
| Non-ambulance arrivals age 16–65 years | 8.8 (8.2 to 9.5) | 8.6 (6.8 to 10.4) |
| Ambulance arrivals age over 65 years | 2.7 (2.4 to 2.9) | 2.4 (1.7 to 3.0) |
| Non-ambulance arrivals age over 65 years | 21.7 (20.7 to 22.8) | 20.4 (17.4 to 23.3) |