Before revision: +VariableDescriptionMale unemploymentThe proportion of economically active males seeking or waiting to start work.Lack of car ownershipThe proportion of all persons in private households which do not own a car.OvercrowdingThe proportion of all persons living in private households with a density of more than one person per roomLow social classThe proportion of all persons in private households with an economically active head of household in social class IV or V Calculating the Index The components of the Carstairs score are unweighted, and so to ensure that they all have equal influence over the final score, each variable is standardised to have a population-weighted mean of zero, and a variance of one, using the z-score method.
After revision: __TOC__+VariableDescriptionMale unemploymentThe proportion of economically active males seeking or waiting to start work.Lack of car ownershipThe proportion of all persons in private households which do not own a car.OvercrowdingThe proportion of all persons living in private households with a density of more than one person per roomLow social classThe proportion of all persons in private households with an economically active head of household in social class IV or V Calculating the Index The components of the Carstairs score are unweighted, and so to ensure that they all have equal influence over the final score, each variable is standardised to have a population-weighted mean of zero, and a variance of one, using the z-score method.