title: The specificity of association in epidemiological study: an age-standardised proportional mortality ratio.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009026:Mortality; D012923:Social Class; D013223:Statistics as Topic; D013274:Stomach Neoplasms / Q000401:mortality; D006113:United Kingdom