ΔNREM–REM | |
Age | −0.13 (0.29) |
Female# | −0.03 (0.78) |
BMI | 0.09 (0.45) |
FEV1 % pred# | 0.04 (0.75) |
FVC % pred | −0.29 (0.02) |
FEV1/FVC | 0.20 (0.1) |
P a,O2 | −0.02 (0.85) |
P a,CO2 | 0.18 (0.17) |
Life alcohol# | 0.02 (0.88) |
Current alcohol# | −0.08 (0.55) |
AHI# | 0.25 (0.04) |
AHI in REM sleep# | 0.24 (0.05) |
%REM | −0.12 (0.32) |
%SWS | 0.32 (0.01) |
REMflow | 0.31 (0.04) |
NREMflow | 0.05 (0.71) |
Data are presented as univariate correlation coefficients (p-values)
ΔNREM–REM: change in transcutaneous carbon dioxide tension on entry to REM from nonrapid-eye movement (NREM) sleep
BMI: body mass index
FEV1: forced expiratory volume in one second
% pred: % predicted
FVC: forced vital capacity
Pa,O2: arterial oxygen tension
Pa,CO2: arterial carbon dioxide tension
Life alcohol: lifetime alcohol consumption
Current alcohol: current alcohol consumption
AHI: apnoea/hypopnoea index
%REM: percentage total sleep time (TST) in REM sleep
%SWS: percentage TST in slow-wave sleep
REMflow: mean score per breath for inspiratory flow limitation in REM sleep
NREMflow: mean score per breath for inspiratory flow limitation in non-REM sleep
#: non-normally distributed variable