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Table 1 Characterisitcs of the study population (n = 142)

From: Genetic influences on the onset of obstructive sleep apnoea and daytime sleepiness: a twin study

Characteristics

Mean (SD)/N(%)

Number of twins

 MZ twins

48 pairs (67.6%)

 DZ twins

23 pairs (32.4%)

Sex

 Male

40 (28.6%)

 Female

102 (72.9%)

Age [years]

50.5 (15.5)

Body mass index (BMI) [kg/m2]

24.1 (3.6)

Diabetes mellitus (DM)

16 (11.30%)

Hypertension

60 (42.3%)

Hypercholesterinaemia

55 (39.3%)

Epworth sleepiness scale (ESS)

6.2 (3.6)

Apnoe hypopnoe index (AHI)

6.4 (7.0)

Arousal index (AI)

48.0 (21.3)

Respiratory arousal index

1.33 (1.77)

Minimal oxygen saturation (MinSatO2)

88.5 (4.6)

Oxygen desaturation index (ODI)

5.0 (6.8)

Respiratory disturbance index (RDI)

14.7 (8.7)

Total Sleep Time (TST)

0.27 (0.03)

TST90

2.3 (6.1)

Presence of obstructive sleep apnea (OSA) based on AHI > 5/h

58 (41.4%)

  1. TST90%: percentage of sleep time spent with oxygen saturation below 90%