Figure 3From: Trends in oral cavity, pharyngeal, oesophageal and gastric cancer mortality rates in Spain, 1952–2006: an age-period-cohort analysis Cohort and period effects (thick lines), curvature (thin line) and change points (vertical grey lines) on cancers of the oral cavity and pharynx, oesophagus and stomach by sex, Spain 1952–2006. Back to article page