Pulse Oximetry for the Detection of Obstructive Sleep Apnea Syndrome: Can the Memory Capacity of Oxygen Saturation Influence Their Diagnostic Accuracy?
Table 1
Patient characteristics.
Patient number
101
Age (years)*
52.3 ± 16
Men (%)
77 (76.2)
BMI (body mass index-kg/m2)*
27.4 (24.9–31.1)
Prevalence of OSAS (%)
(i) RDI ≥ 5
84 (83.2)
(ii) RDI ≥ 10
76 (75.2)
(iii) RDI ≥ 15
69 (68.3)
Patients without OSAS (RDI < 5) (%)
17 (16.8)
Severity of OSAS (%)
(i) RDI ≥ 5–< 15
15 (17.9)
(ii) RDI ≥ 15–< 30
33 (39.3)
(iii) RDI ≥ 30
36 (42.9)
PSG
(i) TRT (total recording time-min)**
422.7 (419.7–430.1)
(ii) TST (total sleep time-min)*
349.9 ± 40.2
(iii) TWT (total wakefulness time-min)**
61.5 (45.8–92.4)
(iv) SE (sleep efficiency)**
0.85 (0.78–0.89)
(v) TNREM (min)*
294.2 ± 34.2
(vi) TREM (min)*
55.2 ± 24.5
(vii) AHI (apnea/hypopnea index)**
20.7 (7.6–37.6)
(viii) AI (apnea index)**
2.4 (0.62–12.7)
(ix) HI (hypopnea index)**
14.7 (4.9–23.4)
(x) RDI (respiratory disturbance index)**
22.6 (10.2–39.9)
Comorbidities (%)
(i) Hypertension
40 (39)
(ii) Coronary heart disease
7 (6.9)
(iii) Cerebrovascular ischemia
3 (2.9)
(iv) Cardiac arrhythmia
14 (13.9)
(v) Asthma
2 (2)
(vi) COPD
7 (6.9)
(vii) Rhinitis
40 (39)
(viii) Diabetes
11 (10.9)
(ix) Hypothyroidism
11 (10.9)
Data are presented as mean ± SD*, median (25–75% percentiles) **, or (%). OSAS: obstructive sleep apnea syndrome. TNREM: total stages 1+2+3+4; TREM: total amount of REM sleep.
