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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