Table 2

Patients’ characteristics according to OSA severity

Controls
AHI<5
Mild
5≤AHI<15
Moderate
15≤AHI<30
Severe
AHI≥30
N5897237501
Male n (%)30 (52)55 (57)168 (71)392 (78)*
Age (years)52.0±13.156.4±13.6*57±11.3*56.0±11.5*
BMI (kg/m2)29.3±7.929±7.528.7±6.830.7±6.9
Hypertension (n (%))33 (56)65 (67)185 (78)413 (82)*
Type 2 diabetes (n (%))19 (33)48 (50)106 (45)227 (45%)
Dyslipidaemia (n (%))34 (59)56 (58)138 (58)323 (64)
SBP (mm Hg)126±18131±18134±19*134±17*
DBP (mm Hg)74±1574±1281±13*82±12*
HR (bpm)68±1567±1469±1371±15
PWV (m/s)10.1±2.610.7±310.3±2.410.4±2.3
Mean nocturnal
SaO2 (%)
93.6±2.393.2±2.593.1±3.192.6±2.9*
SaO2 <90% (%)6.1±16.66.8±14.36.4±14,114.0±20.9*
ESS score7.9±5.78.5±8.49.2±6.510±5.3*
  • Results are observed data. They are expressed as mean±SD or n (%). These percentages are before imputation of missing data.

  • *P value versus controls <0.01.

  • AHI, Apnoea–Hypopnoea Index (events/hour); BMI, Body Mass Index; DBP, diastolic blood pressure; ESS, Epworth Sleepiness Scale; HR, heart rate; PWV, pulse wave velocity; SaO2, oxygen saturation; SaO2 <90%, percentage of recording time spent at a SaO2 <90%; SBP, systolic blood pressure.