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Table 3 Patient’ main characteristics and pulse oximetry data by seasons

From: Age and seasons influence on at-home pulse oximetry results in children evaluated for suspected obstructive sleep apnea

 

Seasons

 

Autumn

Winter

Spring

Summer

P values

Number of patients

198

145

266

172

Male (N° of pts.; %)

128 (64.4%)

86 (59.3%)

173 (65%)

115 (66.9%)

NS

Age

5.1 ± 2.8 (1.0–16.11)

4.3 ± 1.9 (1.0–13.2)

5.1 ± 2.4 (1.2–15.3)

5.0 ± 2.6 (1.0–14.6)

W vs A, Spr, Su < 0.02

BMI Z-score

−0.3 ± 2.7 (−3.9–2.7)

−0.2 ± 2.7 (−3.5–2.8)

−0.3 ± 2.9 (−3.2–2.9)

−0.3 ± 2.8 (−3.4–2.7)

NS

TERT (hrs)

8.0 ± 1.2 (6.0–13.1)

8.1 ± 1.2 (6.0–12.2)

8.1 ± 1.2 (6.0–11.4)

7.8 ± 1.1 (6.0–11.1)

Su vs W, Spr < 0.05

mean SpO2 (%)

98.1 ± 1.3 (86.5–99.9)

97.7 ± 1.5 (92.0–99.8)

97.8 ± 1.0 (88.3–99.9)

98.0 ± 1.0 (92.2–99.9)

A vs W, Spr < 0.002

nadir SpO2 (%)

90.8 ± 7.7 (29.0–99.0)

87.9 ± 11.1 (6.0–97.0)

90.2 ± 6.2 (6.0–9 8.0)

90.8 ± 5.8 (64.0–98.0)

W vs A, Spr, Su < 0.005

SpO2 < 90% (% TERT)

0.6 ± 5.4 (0.0–73.9)

0.8 ± 3.2 (0.0–25.3)

0.4 ± 0.6 (0.0–25.5)

0.1 ± 0.4 (0.0–3.7)

W vs A, Spr < 0.02

DI4 (Falls in saturation by ≥4%/hrs)

2.2 ± 5.0 (0.0–42.1)

4.5 ± 10.9 (0.0–113.4)

2.6 ± 4.2 (0.0–91.3)

2.0 ± 2.8 (0.0–33.6)

W vs A, Spr, Su < 0.005

mean PR (BPM)

87.0 ± 13.2 (53.3–141.0)

91.2 ± 13.1 (60.0–138.0)

86.0 ± 11.9 (54.0–122.0)

85.5 ± 12.8 (51.0–114)

W vs A, Spr, Su < 0.001

Diagnostic Studies (N°,%)

20 (10.1%)

32 (22.1%)

33 (12.4%)

19 (11.0%)

Chi-squared = 12.36; p < 0.01

  1. Data expressed as mean ± SD, unless otherwise specified. TERT Total Effective Recording Time, SpO 2 Oxygen Saturation, DI 4 Oxygen Desaturation ≥4% Index, PR Pulse Rate, A Autumn, W Winter, Spr Spring, Su Summer