Figure 1.

Flowchart of subjects and their vitamin D concentrations. We identified 254 individuals with mycobacterial cultures preceded by vitamin D concentrations in the prior 2 years. Our primary analysis used the vitamin D concentrations as the unit of analysis. From the 254 individuals in our cohort, 1,282 vitamin D concentrations were included in the analysis. Individuals could contribute multiple vitamin D observations, but they could not contribute any vitamin D measurements after an initial NTM positive culture. CF = cystic fibrosis; NTM = nontuberculous mycobacteria.