Figure 2From: No improvement in socioeconomic inequalities in birthweight and preterm birth over four decades: a population-based cohort study 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.Back to article page