Table 4 Association of different variables with dNIV 72 h or mIPAP-72 h in univariable analysis

Age

0.231

0.03

0.218

0.04

BMI

ns

ns

0.501

< 0.001

FEV1% predicted

ns

ns

0.227

0.03

FEV1/FVC

ns

ns

0.319

0.002

LHD^a

0.412

0.009

ns

ns

Kidney disease

0.230

0.04

ns

ns

pH-t0

−0.323

0.002

ns

ns

pH-t1

−0.337

0.001

ns

ns

pH-t2

−0.364

< 0.001

ns

ns

pCO2-t0

ns

ns

0.357

0.001

pCO2-t1

ns

ns

0.332

0.001

pCO2-t2

ns

ns

0.264

0.013