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Fig. 3 | BMC Pregnancy and Childbirth

Fig. 3

From: The risk of preterm birth in combinations of socioeconomic position and mental health conditions in different age groups: a Danish nationwide register-based cohort study

Fig. 3

The results of the second analysis of additive interaction between age and the combinations of education and mental health conditions. a illustrates an example of how to read the attributable proportion (AP) in the bar charts. b presents the results of the analyses of additive interaction with age ≤ 23 year, and c presents the results of the analyses of additive interaction with age ≥ 31 years. In both (b) and (c), the unexposed group was women aged 24–30 years with the combination of high educational level and no mental health conditions

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