TABLE 3

Scoring system for risk of death post lung volume reduction surgery at 90 days

VariableMeasurementScore
BMI kg·m−2>18.50
<18.51
TLCO %>400
20–391
<202
FEV1 L>0.710
<0.712

Scores assigned and added together to attain total score: the Glenfield BFG score. Results based on pre-operative measures. BMI: body mass index; TLCO: transfer factor of the lung for carbon monoxide; FEV1: forced expiratory volume in 1 s.