HL Deb 30 July 1986 vol 479 cc979-80WA

England and Wales
Decennial Supplement 1970–72 Longitudinal Study 1976–81 Decennial Supplement 1979–83 Longitudinal Study 1979–83
Class (1) (2) (3) (4)
I Professional, etc occupations 77 66 66 63
II Intermediate occupations 81 77 74 84
III Skilled occupations
(N) non-manual 99 105 93 89
(M) manual 106 96 103 94
IV Partly skilled occupations 114 109 114 103
IV Unskilled occupations 137 124 159 131

Notes:

(i) Standardised Mortality Ratios are the ratios of mortality rates in each social class to the average for men of all working ages, after allowing for differences between their age structures.

(ii) The Decennial Supplement figures in columns (1) and (3) are compiled from the occupations of deceased persons as recorded on death certificates, and the occupations of the population as recorded in the censuses of population. The Longitudinal Study figures in columns (2) and (4) are based on the death rates of a 1 per cent. sample of the population using their occupations as recorded in the censuses; these figures are subject to sampling errors.

(iii) In columns (1) and (2). the Social Classes are based on the 1970 Classification of Occupations. In columns (3) and (4) they are based on the 1980 Classification of Occupations. The figures in column (3) are subject to bias and do not give reliable estimates of mortality by social class, particularly for Class V.

(iv) Working ages are defined as follows:

Ages 15–64 in Columns (1) and (2)

Ages 20–64 in Column (3)

Ages 16–64 in Column (4)

(v) The precise periods covered are:

Calendar years 1970–72 in column (1)

1st January 1976–5th April 1981 in column (2)

Calendar years 1979, 1980, 1982,1983 in column (3)

6th April 1981–31st December 1983 in column (4).