"Figure 4: In Wales, dementia and Alzheimer’s was the leading cause of death in September 2020","" "Age-standardised mortality rate for selected leading causes of death, per 100,000 people, Wales, deaths registered in September 2020","" "","" "Notes","1. Age-standardised mortality rates per 100,000 people, standardised to the 2013 European Standard Population. Monthly rates in this bulletin are adjusted to allow for comparisons with annual rates. For more information, see [Section 10; Measuring the data](https://www.ons.gov.uk/peoplepopulationandcommunity/birthsdeathsandmarriages/deaths/bulletins/monthlymortalityanalysisenglandandwales/september2020#measuring-the-data). 2. Figures are for deaths registered rather than deaths occurring in each period. 3. Figures for 2020 are based on provisional mortality data and projected populations. 4. Figures exclude non-residents of England and Wales. " "Unit","Age-standardised mortality rates" "","" "Leading cause","September 2020","5-year average" "Dementia and Alzheimer disease","104.4","97.6" "Ischaemic heart diseases","94.9","107.9" "Cerebrovascular diseases","54.5","57.6" "Malignant neoplasm of trachea bronchus and lung","53.1","59.4" "Chronic lower respiratory diseases","45.3","49.1" "Influenza and pneumonia","34.5","42.6" "Malignant neoplasm of colon sigmoid rectum and anus","28.1","30.1" "Malignant neoplasms stated or presumed to be primary of lymphoid haematopoietic and related tissue","23.5","20.8" "Symptoms signs and ill-defined conditions","23.7","22.2" "Malignant neoplasm of prostate","21.5","17.6"