Crude mortality rate

What are crude mortality rates?

A hospital’s crude mortality rate looks at the number of deaths that occur in a hospital in any given year and then compares that against the amount of people admitted for care in that hospital for the same time period. The crude mortality rate can then be set as the number of deaths for every 100 patients admitted.

What it tells you is how a hospital or Trust’s mortality rate changes over time. In the case of our hospitals, the Trust’s historical crude mortality rate is set out in the charts below.

  Total number of patients admitted Total number of deaths % per 100 admitted
2017/18 115,553 1,759 1.52%
2016/17 101,571 1,704 1.68%
2015/16 97,329 1,552 1.59%
2014/15 96,876 1,736 1.79%

This table shows that since the Trust’s inpatient and emergency services were brought together in new facilities at the Lister (2012/13), the crude mortality rate has steadily decreased – underlining the Trust’s commitment that such changes should lead to improved clinical outcomes for patients.

This final table breaks down our crude mortality rates by our major clinical divisions – medicine, surgery and women and children’s services. What this shows is that the relative risk for surgery is much lower than that for general medicine. Reductions in the crude mortality rates have been seen in both the surgery and women and children’s divisions. In medicine, initial improvements have been followed by increases that may reflect the fact that patients admitted into our care are increasingly tending to suffer from multiple, complex medical conditions.

Crude mortality rate (%) by division
  Medicine Surgery Women & Children’s
2017/18 4.87% 0.43% 0.01%
2016/17 4.19% 0.52% 0.02%
2015/16 3.90% 0.50% 0.05%
2014/15 4.05% 0.67% 0.05%

What does all this information tell us?

The number of people dying in our hospitals is low. While the total number of deaths has increased, this reflects the significant increase in the number of patients being admitted to hospital. When this is taken into account, our crude mortality rate has reduced.