Table 1 Summary statistics (median and interquartiles Q1–Q3) for the General statistics, Complexity and Periodicity OBMs evaluated on the SHHS1 database.

From: Digital oximetry biomarkers for assessing respiratory function: standards of measurement, physiological interpretation, and clinical use

Biomarker

Non-OSA (n = 1195)

Mild (n = 1303)

Moderate (n = 833)

Severe (n = 475)

Kruskal test

General statistics

AV

95.90 (94.77–96.93)

95.14 (94.01–96.09)

94.43 (93.36–95.41)

93.51 (92.23–94.67)

p < 0.001

MED

96.00 (95.00–97.00)

95.00 (94.00–96.00)

95.00 (93.00–96.00)

94.00 (93.00–95.00)

p < 0.001

Min

79.00 (72.00–85.00)

79.00 (74.00–84.00)

79.00 (73.00–83.00)

76.00 (70.00–81.00)

p < 0.001

SD

1.42 (1.08–1.90)

1.55 (1.29–1.90)

1.81 (1.50–2.19)

2.33 (1.88–3.04)

p < 0.001

RG

20.00 (14.00–27.00)

19.00 (14.00–25.00)

20.00 (15.00–26.00)

22.00 (18.00–29.00)

p < 0.001

Pxx

91.00 (88.00–93.00)

90.00 (88.00–92.00)

89.00 (86.00–90.12)

85.00 (81.00–88.00)

p < 0.001

Mx

2.14 (1.18–3.82)

3.44 (1.94–5.51)

5.84 (3.49–8.96)

10.98 (6.78–17.00)

p < 0.001

ZCxx

435.00 (346.00–540.00)

481.00 (391.00–579.00)

557.00 (463.50–638.00)

690.00 (592.00–812.50)

p < 0.001

ΔI

0.36 (0.30–0.42)

0.47 (0.41–0.54)

0.66 (0.57–0.76)

1.03 (0.86–1.44)

p < 0.001

Complexity

ApEn

0.17 (0.13–0.20)

0.21 (0.17–0.26)

0.28 (0.23–0.34)

0.39 (0.31–0.48)

p < 0.001

LZ

2389.00 (2241.00–2511.00)

2435.00 (2314.00–2547.00)

2492.00 (2374.50–2587.50)

2587.00 (2483.50–2698.00)

p < 0.001

CTMx

0.92 (0.90–0.93)

0.89 (0.88–0.91)

0.86 (0.84–0.87)

0.79 (0.73–0.82)

p < 0.001

SampEn

0.06 (0.04–0.08)

0.08 (0.06–0.11)

0.12 (0.09–0.15)

0.21 (0.14–0.31)

p < 0.001

DFA

1.14 (0.99–1.37)

1.35 (1.18–1.54)

1.70 (1.49–1.98)

2.47 (2.05–3.24)

p < 0.001

Periodicity

PRSADc

0.56 (0.53–0.60)

0.56 (0.54–0.59)

0.59 (0.56–0.63)

0.67 (0.61–0.78)

p < 0.001

PRSADad

1.55 (1.34–1.89)

1.83 (1.58–2.16)

2.42 (2.01–2.97)

3.68 (2.86–4.94)

p < 0.001

PRSADos

0.11 (0.09–0.13)

0.13 (0.11–0.15)

0.17 (0.14–0.20)

0.25 (0.20–0.33)

p < 0.001

PRSADsb

0.01 (0.00–0.03)

0.03 (0.02–0.05)

0.07 (0.05–0.10)

0.14 (0.09–0.21)

p < 0.001

PRSADsa

0.02 (0.01–0.04)

0.04 (0.03–0.06)

0.08 (0.05–0.11)

0.14 (0.09–0.20)

p < 0.001

AC(x104)

18.20 (17.83–18.54)

17.97 (17.58–18.29)

17.69 (17.30–18.04)

17.33 (16.90–17.79)

p < 0.001

PSD_total

91.49 (89.48–93.71)

94.65 (92.36–97.49)

99.81 (96.76–103.93)

109.27 (103.81–118.61)

p < 0.001

PSD_band

3.22 (2.78–3.91)

4.28 (3.66–5.06)

6.18 (5.18–7.39)

9.46 (7.60–13.42)

p < 0.001

PSD_ratio

0.04 (0.03–0.04)

0.05 (0.04–0.05)

0.06 (0.05–0.07)

0.09 (0.07–0.11)

p < 0.001

PSD_peak

0.02 (0.02–0.02)

0.03 (0.02–0.03)

0.04 (0.03–0.05)

0.06 (0.05–0.10)

p < 0.001

  1. The symbol ‡ indicate when the result of the Dunn post hoc test between all pairs of groups was p < 0.05. Results presented for the categories general statistics, complexity, and periodicity.