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Table 6 Linear regression analysis for the influence of multiple cardiac-independent variables (CVCo) on quantitative dependent variables

From: Cardiometabolic comorbidities in obstructive sleep apnea patients are related to disease severity, nocturnal hypoxemia, and decreased sleep quality

  Model 1: CVCo Model 2: CVCo + adjustement (age, BMI, smoking, sex, dyslipidemia)
  Dependent variables R R2 P value R R2 P value
Demographic data NC 0.092 0.007 0.001 0.722 0.519 <0.0001
Alcool 0.095 0.007 0.005 0.263 0.065 <0.0001
Polysomnographic data AHI 0.060 0.002 0.049 0.352 0.120 <0.0001
AHI / REM 0.064 0.003 0.034 0.348 0.118 <0.0001
AHI / NREM 0.054 0.002 NS 0.341 0.112 <0.0001
SE (%) 0.064 0.003 0.047 0.268 0.067 <0.0001
TST (min) 0.079 0.005 0.010 0.376 0.137 <0.0001
N3 (%) 0.023 0.001 NS 0.074 0.001 NS
REM (%) 0.130 0.016 <0.0001 0.215 0.042 <0.0001
ARI 0.120 0.013 <0.0001 0.196 0.034 <0.0001
Mean duration
AH REM (sec)
0.092 0.007 0.001 0.200 0.036 <0.0001
Mean duration
AH NREM (sec)
0.021 0.001 NS 0.217 0.043 <0.0001
PLM 0.027 < 0.0001 NS 0.142 0.018 <0.0001
ODI (h) 0.009 0.001 NS 0.250 0.059 <0.0001
Mean 02 saturation
TST (%)
0.101 0.009 < 0.0001 0.176 0.027 <0.0001
02 desaturation
< 90% (min)
0.067 0.003 0.024 0.261 0.064 <0.0001
Minimal 02
saturation (%)
0.092 0.007 0.001 0.283 0.076 <0.0001
Mean HR (beats/min) 0.121 0.014 <0.0001 0.363 0.128 <0.0001
  1. CVCo Cardiovascular Comorbidities, BMI Body mass index, NC Neck circumference, AHI Apnea-hypopnea index, AH Apnea-hypopnea, REM Rapid eye movement sleep, NREM Non-rapid eye movement sleep, SL Sleep latency, TST Total sleep time, SE Sleep efficiency, N3 Sleep stage 3, PLM Periodic leg movements index, ODI Oxygen desaturation index, ARI Arousal index, 02 Oxygen, HR Heart rhythm. All the results are expressed as Mean + SD. NS Not significant