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Cumulative incidence of idiopathic pulmonary fibrosis (IPF) in veterans with and without Agent Orange exposure. Time to event was calculated using age as the time scaler from the beginning of the study period (January 1, 2010) to the date of IPF diagnosis, death, or the end of the study period (December 31, 2019), assuming independent left truncation. CI = confidence interval; sHR = subdistribution hazard ratio.
