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Table 2 Comparison of baseline characteristics according to median value of miR-133a-3p

From: Circulating miR-133a-3p defines a low-risk subphenotype in patients with heart failure and central sleep apnea: a decision tree machine learning approach

Variable

miR-133a-3p ≤ median (n = 292)

miR-133a-3p > median (n = 292)

p-value*

N

Mean ± SD/n (%)

Median (Q1–Q3)

N

Mean ± SD/n (%)

Median (Q1–Q3)

Study intervention group

292

  

292

  

0.93

 Control

 

142 (48.6%)

  

144 (49.3%)

  

 ASV

 

150 (51.4%)

  

148 (50.7%)

  

Age (years)

292

70.4 ± 9.3

72 (65–78)

292

68.5 ± 10.2

70 (62–76)

0.019

Male

292

265 (90.8%)

 

292

259 (88.7%)

 

0.50

Body mass index (kg/m2)

288

28.3 ± 4.8

27.8 (24.7–30.6)

291

29.2 ± 5.2

28.4 (25.7–31.7)

0.027

NYHA class III/IV

289

220 (76.1%)

 

291

199 (68.4%)

 

0.041

LVEF (%)

208

33.8 ± 7.5

35 (29–40)

234

33.4 ± 7.7

35 (29–40)

0.43

Diabetes

289

115 (39.8%)

 

291

127 (43.6%)

 

0.36

Ischemic HF

280

174 (62.1%)

 

289

150 (51.9%)

 

0.014

Systolic blood pressure (mmHg)

286

124.8 ± 20.5

120 (110–140)

288

123.9 ± 19.3

120 (110–140)

0.84

Left bundle-branch-block

283

81 (28.6%)

 

287

68 (23.7%)

 

0.18

Atrial fibrillation

284

96 (33.8%)

 

287

79 (27.5%)

 

0.12

Cardiac device

292

161 (55.1%)

 

292

151 (51.7%)

 

0.46

Hemoglobin (g/dL)

285

13.9 ± 1.6

14.0 (12.8–15.0)

289

14.0 ± 1.5

14.2 (13.1–15.0)

0.24

eGFR CKD-EPI formula (mL/min/1.73m2)

283

55.6 ± 21.5

55.2 (37.8–72.0)

284

58.8 ± 20.5

56.9 (44.3–73.9)

0.12

6-min walk distance (meters)

276

331.3 ± 118.8

345 (258–420)

279

327.3 ± 131.0

332 (245–438)

0.84

ACEI or ARB

292

273 (93.5%)

 

292

265 (90.8%)

 

0.28

Beta-blocker

292

267 (91.4%)

 

292

267 (91.4%)

 

1.00

Aldosterone antagonist

292

130 (44.5%)

 

292

161 (55.1%)

 

0.013

Diuretic

292

255 (87.3%)

 

292

251 (86.0%)

 

0.72

Cardiac glycoside

292

78 (26.7%)

 

292

72 (24.7%)

 

0.64

Antiarrhythmic drug

292

55 (18.8%)

 

292

45 (15.4%)

 

0.32

Epworth Sleep Scale score

292

6.6 ± 4.3

6 (4–9)

291

7.2 ± 4.4

6 (4–10)

0.16

AHI (n events/hr)

291

30.2 ± 12.3

27 (20–38)

292

30.4 ± 13.2

27 (20–38)

0.96

Central apnea index/total AHI (%)

291

46.2 ± 30.1

47 (19–73)

292

48.6 ± 28.6

51 (24–73)

0.32

Central AHI/total AHI (%)

291

80.8 ± 15.4

85 (69–94)

292

80.6 ± 14.6

82 (70–93)

0.65

Oxygen Desaturation index

292

34.0 ± 17.6

33 (21–44)

290

32.4 ± 17.3

30 (20–43)

0.21

Average oxygen saturation (%)

292

92.6 ± 2.4

93 (91–94)

292

92.9 ± 2.3

93 (92–94)

0.051

Minimum oxygen saturation (%)

291

80.6 ± 6.5

82 (77–85)

292

81.1 ± 6.8

83 (78–86)

0.14

Time with oxygen saturation < 90% (min)

289

50.8 ± 64.8

28 (7–68)

292

46.0 ± 62.6

20 (4–63)

0.15

Cheyne-stokes respiration

252

  

251

  

0.13

  < 20%

 

44 (17.5%)

  

62 (24.7%)

  

 20–50%

 

98 (38.9%)

  

92 (36.7%)

  

  > 50%

 

110 (43.7%)

  

97 (38.6%)

  

NT-proBNP (pg/mL)

289

3131 ± 5172

1644 (785–3235)

291

2315 ± 4151

1119 (499–2683)

0.0004

Primary outcome

292

173 (59.2%)

 

292

137 (46.9%)

 

0.004

Time to primary outcome (years)

292

2.3 ± 1.9

2.0 (0.5–3.5)

292

2.4 ± 1.8

2.2 (0.8–3.7)

0.16

Time to follow-up (years)

292

3.0 ± 1.9

3.0 (1.7–4.5)

292

3.1 ± 1.7

3.0 (2.0–4.3)

0.38

  1. Bold values indicate the statistically significant results
  2. N number of available values, SD standard deviation, Q1 first quartile, Q3 third quartile, ACEI angiotensin-converting enzyme inhibitors, AHI apnea hypopnea index, ARB angiotensin II receptor blockers, ASV adaptive-servo ventilation, CV cardiovascular; HF heart failure, LVEF left ventricular ejection fraction, NYHA class, New York Heart Association
  3. *p-value from Wilcoxon test for continuous variables, Fisher's exact test for categorical variables