Figure 2.

The percentage of preterm birth by area deprivation measured by Townsend deprivation score (TDS) quartiles, Newcastle upon Tyne, 1961-2000: a) TDS 1 (least deprived); b) TDS 2; c) TDS 3; d) TDS 4 (most deprived). The dotted lines are the observed (yearly) proportions for each TDS quartile, the solid lines are the five-year moving averages of the yearly proportions.

Glinianaia et al. BMC Public Health 2013 13:345   doi:10.1186/1471-2458-13-345
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