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Table 2 Sleep parameters among patients and controls

From: Impact of obstructive sleep apnea on platelet activation and development of silent brain infarctions

 

Patients (n = 24)

Mean ± SD

Median (min.–max.)

Controls (n = 24)

Mean ± SD

Median (min.–max.)

Test of sig

p

Total sleep time (min.)

348.3 ± 96.9

383.1 ± 39.6

t = 2.277*

< 0.05*

332.0 (129.5–479)

353.0 (244–477)

Sleep efficiency %

74.93 ± 11.0

88.75 ± 3.64

t = 5.842*

< 0.001*

75.55 (52.10–92.0)

88.20 (81.80–94.50)

Arousal index

23.42 ± 7.75

4.51 ± 2.74

t = 11.266*

< 0.001*

26.05 (10.20–36.0)

4.20 (0.80–9.40)

REM%

16.30 ± 11.71

13.36 ± 4.92

U = 273.50

0.958

12.90 (4.90–47.90)

12.30 (4.30–20.50)

AHI

34.79 ± 21.80

1.50 ± 1.18

U = 0.0*

< 0.001*

28.85 (8.10–83.10)

1.20 (0.0–3.90)

O2 desaturation Index

8.77 ± 8.22

1.81 ± 2.01

U = 113.0*

< 0.001*

8.35 (0.0–25.20)

1.05 (0.0–6.40)

Lowest O2 saturation

78.58 ± 13.42

90.75 ± 5.16

t = 4.145*

< 0.001*

84.0 (50.0–94.0)

92.0 (81.0–97.0)

  
  1. SD: standard deviation; t: Student’s t-test; U: Mann–Whitney test; REM: rapid eye movement; AHI: apnea–hypopnea index
  2. *Statistically significant at p ≤ 0.05