passages.id: 725
passages.type: sentence
passages.text: The relation was equally strong in patients with severe pulmonary disease ; for patients with FEV1 < 1.51 the mean difference was 0.21 ( 0.80 ) mmol/min/kPa .
entities.id: 726
entities.type: outcome
entities.text: relation
entities.id: 727
entities.type: outcome
entities.text: FEV1
entities.id: 728
entities.type: participant
entities.text: patients with severe pulmonary disease