Characteristics of patients with and without perceived symptomatic benefit from noninvasive ventilation (NIV)

Symptomatic benefitNo symptomatic benefitp-value
Subjects n1818
Gender male9 (50)8 (44)0.739
Somnolence at admission16 (89)14 (78)0.371
Somnolence at follow-up12 (67)12 (67)1.000
PCO2 at admission kPa5.9 (5.1–11.8)6.9 (5.5–8.6)0.707
PCO2 at follow-up kPa5.8 (4.9–7.8)6.1 (5.5–7.7)0.037
NIV hours at follow-up4.3 (0.2–10.4)1.6 (0–8.0)0.047
FEV1 % pred65±2069±190.623
FVC % pred65±2269±190.562

Data are presented as mean±sd, n (%) or median (range), unless otherwise stated. Values in bold represent statisitically significant results. PCO2: carbon dioxide tension; FEV1: forced expiratory volume in 1 s; FVC: forced vital capacity.