at the limit of significanceP = 0.054
10.85 ± 1.68 ng/mL, P = 0.035 Figure 2 ] and had weak negative correlation with FEV1% at the beginning, at the limit of significance (Rho = −0.254, P = 0.054) and at the end of the follow-up period (Rho = −0.296, P = 0.028).