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Table 2 Sleepiness, fatigue, and sleep apnea in relation to heath-related quality of life

From: Fatigue and sleepiness determine respiratory quality of life among veterans evaluated for sleep apnea

 

Linear regression modeling

Model 1a

Model 2b

Risk factor

Beta

95% CI

p-value

Partial R2

Total R2

Beta

95% CI

p-value

Partial R2

Total R2

Short Form (SF)-12 Physical Component Scale

 ESS

−3.33

−3.99;−2.68

<0.01

0.06

0.09

−0.50

−1.11;0.12

0.11

<0.01

0.33

 FSS

−7.56

−8.13;−7.00

<0.01

0.31

0.33

−7.37

−7.98;−6.76

<0.01

0.26

 AHI

−0.11

−0.86;0.64

0.77

<0.01

0.04

0.08

−0.55;0.71

0.81

<0.01

AQ-20R Respiratory-Specific Health-Related Quality of Life

 ESS

1.62

1.39;1.86

<0.01

0.10

0.12

0.78

0.54;1.02

<0.01

0.03

0.27

 FSS

2.48

2.26;2.70

<0.01

0.24

0.25

2.18

1.94;2.41

<0.01

0.17

 AHI

0.17

−0.11;−0.45

0.23

<0.01

0.02

0.04

−0.20;0.29

0.73

<0.01

  1. All regression beta values are scaled standardized units of the independent predictors. Higher SF-12 equates with better Health-Related Quality of Life; higher AQ-20R with poorer health-related quality of life
  2. Abbreviations: AHI apnea-hypopnea index, BMI Body Mass Index, CI confidence intervals, ESS Epworth Sleepiness Scale, FSS Fatigue Severity Scale
  3. aModel 1 also includes age, sex, marital status and BMI
  4. bModel 2 includes ESS, FSS, AHI altogether in the same multivariate model, along with age, sex, marital status and BMI