Table 1—

Demographic characteristics of surfactant protein B single nucleotide polymorphisms in 389 National Emphysema Treatment Trial subjects

Age yrs67±6
Smoking history pack-yrs66±30
Post-BD FEV1 % pred28±7
Modified BODE index5±3
Male sex64
Exacerbations >1#56
Bronchodilator therapy99
Inhaled corticosteroid therapy71
Inhaled anticholinergic therapy82
Current systemic corticosteroid therapy24
  • Data are presented as mean±sd or %, apart from modified body mass index, airflow obstruction, dyspnoea and exercise capacity (BODE) index which is presented as median±interquartile range. BD: bronchodilator administration; FEV1: forced expiratory volume in one second; % pred: % predicted; IQR: interquartile range; LVRS: lung volume reduction surgery. #: exacerbations ranged 0–29 events per subject.