1. Volume 139, Issue 2, Pages 253-259 (February 2011)
Oximeter-Based Autonomic State Indicator Algorithm for Cardiovascular Risk Assessment 
Grote Ludger , MD, PhD, Sommermeyer Dirk , MSc, Zou Ding , MD, PhD, Eder Derek N. , PhD, Hedner Jan , MD, PhD 
CHEST 
Volume 139, Issue 2, Pages (February 2011)
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Copyright © 2011 The American College of Chest Physicians Terms and Conditions

2. Figure 1
Study flowchart. ASI = autonomic state indicator; PG = polygraphy; PSG =polysomnography.
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Copyright © 2011 The American College of Chest Physicians Terms and Conditions

3. Figure 2
Neuro-fuzzy system for classification procedure of high-risk patients.
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Copyright © 2011 The American College of Chest Physicians Terms and Conditions

4. Figure 3
Three-minute period of stable non-rapid eye movement sleep without detectable EEG arousal. Please note the variability of both pulse wave amplitude and pulse rate (PR). PPT = pulse propagation time; PWA = pulse wave attenuation; RRPO = respiration-related pulse oscillation; Spo2 = oxygen desaturation.
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Copyright © 2011 The American College of Chest Physicians Terms and Conditions

5. Figure 4
ORs, with 95% CIs, for cardiovascular (CV) risk class progressions over interquartile range spans of each ASI parameter (eg, PPT 200:140). For example, a subject with an Spo2 index of 26 exhibits a 1.7 times (70%) greater risk of being in a higher CV risk class than a subject with an Spo2 index of 4.7. PR.I = pulse rate index; PWA.I = pulse wave attentuation index; Spo2.I = hypoxia index. See Figure 1 and 3 legends for expansion of other abbreviations.
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Copyright © 2011 The American College of Chest Physicians Terms and Conditions

6. Figure 5
A receiver operating characteristic curve showing the sensitivity and specificity of the ASI CV risk score for correct European Society of Hypertension/European Society of Cardiology high CV risk classification in the validation set (n = 49). See Figure 1 and 4 legends for expansion of abbreviations.
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Copyright © 2011 The American College of Chest Physicians Terms and Conditions