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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%