Table 1 Basic characteristics in the training set and validation set.

From: A risk prediction nomogram for resistant hypertension in patients with obstructive sleep apnea

Characteristic

Training set

(n = 539)

Validation set

(n = 259)

Sex

 Male

437 (81.1)

210 (81.1)

Age (year)

52.26 (13.58)

54.23 (12.67)

BMI (kg/m2)

27.30 (4.01)

27.16 (4.06)

Smoke

198 (36.7)

90 (34.7)

Alcohol

65 (12.1)

33 (12.7)

Family history of hypertension

169 (31.4)

77 (29.7)

Heart disease

71 (13.2)

38 (14.7)

Diabetes

101 (18.7)

45 (17.4)

Resistant hypertension

116 (21.5)

49 (18.9)

Neck circumference (cm)

36.13 (2.05)

36.22 (2.2)

Waist circumference (cm)

95.11 (5.10)

95.76 (7.17)

ESS

10.72 (3.17)

10.81 (2.14)

Total sleep time (h)

7.41 (1.88)

7.7 (1.66)

AHI

29.57 (17.87)

27.31 (16.27)

T90 (%)

1.88 (7.53)

1.59 (6.61)

ODI

20.32 (18.91)

18.14 (17.38)

LSaO2 (%)

76.36 (10.67)

77.61 (13.18)

MSaO2 (%)

94.87 (4.53)

94.96 (2.68)

TC (mmol/L)

4.31 (0.99)

4.34 (1.02)

Triglyceride (mmol/L)

2.00 (1.71)

2.01 (1.15)

HDL (mmol/L)

1.11 (0.25)

1.08 (0.22)

LDL (mmol/L)

2.57 (0.76)

2.56 (0.71)

FBG (mmol/L)

5.77 (1.56)

5.86 (1.85)

  1. BMI, body mass index; ESS, Epworth sleepiness scale; AHI, apnea–hypopnea index; T90, percentage of total time with oxygen saturation level < 90%; ODI, oxygen desaturation index; LSaO2, lowest arterial oxygen saturation; MSaO2, mean arterial oxygen saturation; TC, total cholesterol; HDL, high density lipoprotein; LDL, low density lipoprotein; FBG, fasting blood glucose.