Introduction
This section of the study looks at the mortality rates of those with the GRAY and GREY names. The definitions used in this section are given below, as is a table containing the base-line data for the United Kingdom. The results of this analysis will be provided in the summary.
Summary
{work in progress}
Definitions
A basic measure of the level of mortality in a population is given by the crude death rate. This is defined as total deaths per thousand population.
The ‘infant mortality rate’ (actually a ratio) is defined as the number of deaths at ages under one year per thousand live births in the same period.
Base-Line Data (UK)
To give a basis of comparison with the mortality of the population as a whole, data has been obtained from the National Statistics web site (www.statistics.gov.uk) and is Crown copyright material reproduced with the permission of the Controller Office of Public Sector Information (OPSI) under the terms of the Click-Use license.
| Date | Deaths | Mortality Rate | Infantile Mortality Rate |
| 1841-1845 | 1,746,110 | 21.4 | 148 |
| 1846-1850 | 2,023,286 | 23.3 | 157 |
| 1851-1855 | 2,087,236 | 22.7 | 156 |
| 1856-1860 | 2,123,479 | 21.8 | 152 |
| 1861-1865 | 2,331,957 | 22.6 | 151 |
| 1866-1870 | 2,462,541 | 22.4 | 157 |
| 1871-1875 | 2,572,749 | 22.0 | 153 |
| 1876-1880 | 2,605,562 | 20.8 | 145 |
| 1881-1885 | 2,585,164 | 19.4 | 139 |
| 1886-1890 | 2,659,606 | 18.9 | 145 |
| 1891-1895 | 2,785,391 | 18.7 | 151 |
| 1896-1900 | 2,789,984 | 17.7 | 156 |
| 1901-1905 | 2,671,566 | 16.0 | 138 |
| 1906-1910 | 2,577,208 | 14.7 | 117 |
| 1911-1915 | 2,598,719 | 14.3 | 110 |