Regarding sub-classification of population, we noticed a similar modification after IV antibiotic treatment for PPaa vs. adult population in FEV1% (p=0.002), FVC% (p=0.000) and LCI 2.5 (p=0.014). We registered a better increase of LCI 2.5 in PPaa population (-10.27% vs -4,57%) than adult one. On the contrary, in adult population we recorded significative differences in FVC% after treatment (p=0.065).

Considering correlation, we noticed a positive good correlation among LCI 2.5 and Scond (rho= +0.615, p=0.000) and Sacin (rho=+0.649, p=0.000) in post treatment period. FEV1% and LCI 2.5 showed a negative strong correlation (rho= -0.78 with p=0.000) after IV antibiotic therapy.