Table 1 Epidemiological data and presentation characteristics of NSTEMI patients by gender

Age

56.68 ± 13.30

64.52 ± 12.56

58.37 ± 13.53

<. 001

Saudi

322 (53.85%)

137 (83.54%)

459 (60.24%)

<. 001

Ethnicity

<. 001

 Arab

427 (71.40%)

155 (94.51%)

582 (76.38%)

 South Asian

152 (25.42%)

8 (4.88%)

160 (21.00%)

 Others

19 (3.18%)

1 (0.61%)

20 (2.62%)

BMI

28.58 ± 5.33

30.58 ± 6.23

29.01 ± 5.59

<. 001

History of angina

202 (33.78%)

68 (41.46%)

270 (35.43%)

0.068

History of MI

139 (23.24%)

36 (21.95%)

175 (22.97%)

0.727

History MI angina

241 (40.30%)

74 (45.12%)

315 (41.34%)

0.267

History of PCI

109 (18.23%)

30 (18.29%)

139 (18.24%)

0.985

History of CABG

32 (5.35%)

8 (4.88%)

40 (5.25%)

0.810

History of heart failure

54 (9.03%)

25 (15.24%)

79 (10.37%)

0.021

History of stroke

30 (5.02%)

11 (6.71%)

41 (5.38%)

0.395

History of chronic renal failure

49 (8.19%)

24 (14.63%)

73 (9.58%)

0.013

DM

334 (55.85%)

132 (80.49%)

466 (61.15%)

<. 001

HTN

355 (59.36%)

140 (85.37%)

495 (64.96%)

<. 001

Hypercholesterolemia

245 (40.97%)

79 (48.17%)

324 (42.52%)

0.098

Current/ex-smoking

343 (57.36%)

8 (4.88%)

351 (46.06%)

<. 001

Chief complaint

0.002

 Chest pain

507 (84.78%)

117 (71.34%)

624 (81.89%)

 SOB/fatigue

58 (9.70%)

33 (20.12%)

91 (11.94%)

 Epigastric/shoulder/back/neck pain

21 (3.51%)

10 (6.10%)

31 (4.07%)

 Cardiac arrest

2 (0.33%)

1 (0.61%)

3 (0.39%)

 Others

10 (1.67%)

3 (1.83%)

13 (1.71%)

First medical contact

163 (27.26%)

27 (16.46%)

190 (24.93%)

0.005

Visited emergency department

142 (87.12%)

25 (92.59%)

167 (87.89%)

0.419

Clinic doctor

27 (16.56%)

4 (14.81%)

31 (16.32%)

0.820

Visited a pharmacy

3 (1.84%)

1 (3.70%)

4 (2.11%)

0.532

Transferred by Saudi Red Crescent

15 (2.51%)

7 (4.27%)

22 (2.89%)

0.233

HR (bpm) upon arrival

84.01 ± 19.36

91.64 ± 18.94

85.65 ± 19.51

<. 001

SBP (mm Hg) upon arrival

135.8 ± 25.56

144.3 ± 30.82

137.6 ± 26.99

<.001

HR > 100 bpm

93 (15.55%)

42 (25.61%)

135 (17.72%)

0.003

SBP < 90 mm Hg

8 (1.34%)

3 (1.83%)

11 (1.44%)

0.640

Cardiac arrest upon arrival

 Cardiac arrest upon arrival

7 (1.17%)

1 (0.61%)

8 (1.05%)

0.532

CHF Killip class

 Class I

507 (84.78%)

109 (66.46%)

616 (80.84%)

< .001

 Class II/III

84 (14.05%)

53 (32.32%)

137 (17.98%)

 IV

7 (1.17%)

2 (1.22%)

9 (1.18%)

Echo options

 Normal LV systolic function (EF > 50%)

237 (43.33%)

53 (35.33%)

290 (41.61%)

0.025

 Mild LV systolic dysfunction (EF 40-50%)

164 (29.98%)

52 (34.67%)

216 (30.99%)

 Moderate LV systolic dysfunction (EF 30-40%)

88 (16.09%)

36 (24.00%)

124 (17.79%)

 Severe LV systolic dysfunction (EF < 30%)

58 (10.60%)

9 (6.00%)

67 (9.61%)

ECG done/transferred

 ECG done/transferred

340 (56.86%)

68 (41.46%)

408 (53.54%)

< .001

Arterial access

 Femoral

124 (46.62%)

28 (59.57%)

152 (48.56%)

0.101

 Radial

142 (53.38%)

19 (40.43%)

161 (51.44%)