Among those excluded we observe a significantly higher proportion of CS births (11.3%) compared to those who conscripted (9.8%) and our main analytic sample (8.8%) as well as a clear trend towards lower socioeconomic position, particularly in those not invited for conscription, Supplementary Table S4 .
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The association between birth by cesarean section and adolescent cardiorespiratory fitness in a cohort of 339,451 Swedish males.
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