Table 1 Baseline characteristics of study population.

From: Incremental value of QT interval for the prediction of obstructive coronary artery disease in patients with chest pain

 

Total

Non-OCAD

OCAD

p

(N = 1741)

(N = 1080)

(N = 661)

Age, mean (SD)

61.4 (11.3)

59.1 (11.3)

65.3 (10.3)

 < 0.001

Men, n (%)

586 (33.7)

336 (31.1)

250 (37.8)

0.004

Chest pain, n (%)

   

 < 0.001

Non-specific

248 (14.2)

182 (16.9)

66 (10.0)

 

Atypical

640 (36.8)

417 (38.6)

223 (33.7)

 

Typical

853 (49.0)

481 (44.5)

372 (56.3)

 

Obesity, n (%)

818 (47.0)

502 (46.4)

316 (47.8)

0.361

BMI, mean (SD)

25.0 (3.5)

25.0 (3.5)

24.9 (3.5)

0.573

Hypertension, n (%)

909 (52.2)

501 (46.4)

408 (61.7)

 < 0.001

DM, n (%)

366 (21.0)

166 (15.4)

200 (30.3)

 < 0.001

Dyslipidemia, n (%)

345 (19.8)

206 (19.1)

139 (21.0)

0.321

Family history of CAD, n (%)

303 (17.4)

180 (16.7)

123 (18.6)

0.166

Current smoker, n (%)

240 (13.8)

123 (11.4)

117 (17.7)

 < 0.001

Antidiabetic drug therapy, n (%)

296 (17.0)

132 (12.2)

164 (24.8)

 < 0.001

Antihyperlipidemic drug therapy, n (%)

759 (43.6)

421 (39.0)

338 (51.1)

 < 0.001

Antithrombotic drug use

Aspirin, n (%)

694 (39.9)

369 (34.2)

325 (49.2)

 < 0.001

Clopidogrel, n (%)

418 (24.0)

196 (18.1)

222 (33.6)

 < 0.001

Antihypertensive drug therapy

RAS inhibitor, n (%)

549 (31.5)

282 (26.1)

267 (40.4)

 < 0.001

CCB, n (%)

482 (27.7)

312 (28.9)

170 (25.7)

0.084

β-blockers, n (%)

385 (22.1)

171 (15.8)

214 (32.4)

 < 0.001

Diuretics, n (%)

121 (7.0)

56 (5.2)

65 (9.8)

 < 0.001

Electrocardiography

QTc interval (ms)

434.5 (31.3)

429.0 (27.8)

443.5 (34.4)

 < 0.001

Heart rate (/min)

70.0 (12.6)

69.1 (91.8)

71.4 (13.8)

 < 0.001

QRS duration (ms)

91.3 (28.2)

91.4 (32.6)

91.3 (19.3)

0.932

  1. OCAD obstructive coronary artery disease, BMI body mass index, DM diabetes mellitus, CAD coronary artery disease, RAS renin angiotensin system, CCB calcium channel blockers, QTc corrected QT.