Fig 3From: Working conditions and tuberculosis mortality in England and Wales, 1890–1912: a retrospective analysis of routinely collected dataTB mortality rates over time (per 100,000 person-years), 1890–1912, by a occupational exposure to crowded indoor spaces b age group (in years) and c socioeconomic position (SEP, where group 1 is the highest position and group 5 the lowest)Back to article page