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Incidences rates of CD (n = 13,445, panel a) and UC (n = 8,803, panel b) in Northern France over the study period (1988–2017), by sex and 5-year age groups; Women/Men incidence rate ratio (IRR) according to age group in CD (panel c) and UC (panel d). Incidence rates with confidence intervals are given in Supplementary Table S6.
