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Table 2 Comparison of cardiovascular risk factors and obstructive sleep apnea related hypoxia parameters of patients according to the apnea-hypopnea index

From: Advanced age and apnea-hypopnea index predict subclinical atherosclerosis in patients with obstructive sleep apnea syndrome

  Group 1 Group 2 Group 3 Group 4 P
(AHI < 5) (AHI 5–15) (AHI 16–29) (AHI ≥30)
(n = 16) (n = 14) (n = 19) (n = 24)
Age, years 50 ± 10 48 ± 9 47 ± 9 52 ± 10 0.282
Male/Female 9/7 6/8 13/6 15/9 0.498
Diabetes mellitus 4 (25%) 2 (14%) 6 (32%) 9 (38%) 0.473
Hypertension 6 (38%) 5 (36%) 4 (21%) 12 (50%) 0.281
Smoking 6 (38%) 7 (50%) 11 (58%) 14 (58%) 0.568
Body mass index, kg/m2 28.2 ± 4.8 30.9 ± 6.4 28.4 ± 4.8 32.2 ± 4.1 0.035
Hyperlipidemia 6 (38%) 3 (21%) 3 (16%) 9 (38%) 0.332
Apnea-hypopnea index (min-max) 2.4 ± 1.1 8.0 ± 2.0 22.5 ± 4.3 45.3 ± 16.3 <0.001
(1–4) (6–12) (16–28) (30–95)
Basal oxygen saturation,% 94 ± 6 87 ± 10 77 ± 12 71 ± 12 <0.001
Oxygen desaturation index (min-max) 0.7 ± 2.7 2.7 ± 3.2 5.1 ± 3.3 14.6 ± 19.7 <0.001
(0–11) (0–10) (0–12) (2–47)
Coronary calcium score (min-max) 1.4 ± 3.0 1.9 ± 4.9 32.2 ± 97.5 59.5 ± 121.2 0.015
(0–11) (0–15) (0–420) (0–480)
Presence of coronary artery calcification 4 (25%) 2 (14%) 7 (37%) 14 (58%) 0.032