marginal significanceP -value =0.067
In our current study, patients with airflow limitation tended to have worse prognosis than did those without airflow limitation group, with marginal significance ( P -value =0.067) ( Figure S1 ).
In our current study, patients with airflow limitation tended to have worse prognosis than did those without airflow limitation group, with marginal significance ( P -value =0.067) ( Figure S1 ).