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Table 2 Noctural hypoxemia parameters, overall and according to the acute treatment strategy

From: Influence of nocturnal hypoxemia on follow-up course after type B acute aortic syndrome

Ventilatory parameters

All patients (n = 103)

Medical

therapy alone

(n = 71)

Aortic stenting

(n = 32)

p value

ODIa, number of events per hour, median (IQR)

13.2 [7.0–25.2]

12.6 [6.4–24.9]

14.2 [8.5–27.4]

0.54

ODIa, equal or greater than 15, n (%)

42 (45.7)

28 (45.2)

14 (46.7)

0.89

AHI, number of events per hour, median (IQR)

18.2 [9.5–38.2]

18.2 [8.1–36.5]

18.8 [11.0–43.5]

0.66

AHI, equal or greater than 15, n (%)

60 (58.3)

42 (59.2)

18 (56.3)

0.78

Lowest nocturnal oxygen saturationb, %

82.3 (6.5)

82.0 (6.7)

82.9 (6.1)

0.56

Mean nocturnal oxygen saturationc, %

92.6 (2.2)

92.3 (2.2)

93.2 (1.9)

0.050

Percentage of nocturnal time under a saturation of 90%d, %, median (IQR)

4.0 [0.5–18.0]

5.9 [1.0–19.0]

1.7 [0.1–12.8]

0.044

  1. The results were highlighted (bold) when the p value was inferior or equal to 0.05
  2. Values are expressed as mean (standard deviation) unless otherwise indicated
  3. ODI, oxygen desaturation index; AHI, apnea–hypopnea index
  4. a11 missing values (2 patients with aortic stenting)
  5. b9 missing values (3 patients with aortic stenting)
  6. c3 missing values (1 patient with aortic stenting)
  7. d4 missing values (1 patient with aortic stenting)