Predictive value of BAL cellular analysis in differentiating pulmonary tuberculosis and sarcoidosis.

With respect to the ambient nitric oxide values, we have examined their effect on exhaled nitric oxide. Since there was no significant influence of ambient nitric oxide levels ,20 ppb on the fraction of exhaled nitric oxide values in our study population (figs 2 and 3), we decided to include all children with ambient nitric oxide levels ,20 ppb in the analyses. When the analyses were repeated, including only those children for whom the ambient nitric oxide values were ,10 ppb, similar results were observed.