Antireflux therapy increased baseline impedance ( from 1498 [ IQR 951-2472 ] to 2393 [ IQR 1353-3027 ] , p = 0.001 ) , however it only led to a partial recovery when compared to healthy controls ( 2393 [ IQR 1353-3027 ] vs 2983 [ 2335-3810 ] , p < 0.01 ) .