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Stratified prospective analyses of the association of plasma vitamin C with risk of graft failure. pinteraction was calculated by fitting models, which contain both main effects and their cross-product term, with adjustment for age, sex, body mass index, donor age, donor sex, estimated glomerular filtration rate (eGFR), and proteinuria. Hazard ratios (95% CI) are calculated per 1–SD increment in plasma vitamin C.
