Jarman 8 Score  

An excel spreadsheet template for Jarman scores is available. 

 The method of calculation is as follows;

Step 1:   The following variables are extracted from the 1991 Census;

V1  =   Lone pensioners as % of all residents in households
V2  =   Under 5s as % of all residents in households
V3  =   Persons in single parent households as % of all residents in households
V4  =   Persons in households headed by a person in socio-economic group 11 (unskilled) as % of all residents in households
V5  =   Unemployed as % of economically active residents aged 16 and over
V6  =   Persons in households with more than one person per room as % of all residents in households
V7  =   Persons changed address in last year as % of all residents
V8  =   Persons in non-white ethnic groups as % of all residents

Step 2:  All variables are 'normalised' by transforming them with LN(V+1), e.g.  N1 = LN(V1+1)

Step 3: The variables are standardised by subtracting the mean and dividing by the standard deviation;  e.g.    S1 = (N1 - mean of N1)/ S.D. of N1

Step 4: The Jarman 8 Score is calculated by calculating a weighted sum of the standardised variables;

 i.e.    Jarman 8 Score =   (6.62*S1) + (4.64*S2) + (3.01*S3) + (3.74*S4) + (3.34*S5) + (2.88*S6) + (2.68*S7) + (2.50*S8)