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Table 2 Characteristics of first time myocardial infarction patients according to total pre-hospital delay

From: Pre-hospital delay in patients with myocardial infarction: an observational study in a tertiary care hospital of northern Bangladesh

Characteristics Median Pre-hospital delay (IQR) (hours) Total (n = 337) ≤6 h (n = 133) > 6 h (n = 204) P-value
Age, mean (SD)   54.37 (12.58) 53.40 (10.75) 55.01 (13.63) 0.228
Age category
 ≤ 40 years 10 (12) 47 (13.9) 9 (6.8) 38 (18.6) < 0.001
 41–60 years 6 (10) 180 (53.4) 91 (68.4) 89 (43.6)  
 > 60 years 11 (21) 110 (32.6) 33 (24.8) 77 (37.7)  
Sex
 Male 8 (13) 254 (75.4) 103 (77.4) 151 (74.0) 0.476
 Female 12 (18) 83 (24.6) 30 (22.6) 53 (26.0)  
Marital status
 Married 8 (13) 294 (87.2) 112 (84.2) 182 (89.2) 0.178
 Single/widowed 9 (13) 43 (12.8) 21 (15.8) 22 (10.8)  
Educational status
 None/primary 10.5 (23) 224 (66.5) 82 (36.6) 142 (63.4) 0.111
 Secondary/Higher secondary 9 (15) 68 (20.2) 27 (39.7) 41 (60.3)  
 University graduate 6 (7) 45 (13.4) 24 (53.3) 21 (46.7)  
Family income
 Lower (< BDT 15000) 8 (15) 210 (62.3) 85 (63.9) 125 (61.3) < 0.001
 Middle (BDT 15000 – BDT 30000) 10 (12) 102 (30.3) 30 (22.6) 72 (35.3)  
 Higher (> BDT 30000) 4 (8) 25 (7.4) 18 (13.5) 7 (3.4)  
Residence
 Rural 9 (13) 233 (69.1) 82 (61.7) 151 (74.0) 0.016
 Urban 6.5 (12) 104 (30.9) 51 (38.3) 53 (26.0)  
Distance of primary care center
 ≤ 5 km 7.5 (12) 238 (70.6) 109 (82.0) 129 (63.2) < 0.001
 > 5 km 11 (19) 99 (29.4) 24 (18.0) 75 (36.8)  
Mode of transport
 Ambulance 8 (13) 96 (28.5) 40 (30.1) 56 (27.5) 0.602
 General transport 8 (14) 241 (71.5) 93 (69.9) 148 (72.5)  
Diagnosis
 STEMI 8 (14) 251 (74.5) 100 (75.2) 151 (74.0) 0.810
 Non-STEMI 8 (18) 86 (25.5) 33 (24.8) 53 (26.0)  
Predominant clinical symptom
 Chest pain 6.5 (8) 262 (77.7) 125 (94.0) 137 (67.2) < 0.001
 Symptoms other than chest pain 28 (38) 75 (22.3) 8 (6.0) 67 (32.8)  
Behavior after onset of symptoms
 Misinterpreting the nature of pain 6 (8) 67 (19.9) 30 (22.6) 37 (18.1) < 0.001
 Did not consider the symptoms to be serious 16 (20) 67 (19.9) 6 (4.5) 61 (29.9)  
 Waited to see symptoms would going 45 (76) 39 (11.6) 0 (0.0) 39 (19.1)  
 Suspected as MI 5 (5) 164 (48.7) 97 (72.9) 67 (32.8)  
First medical action after onset of symptoms
 Visiting qualified doctor 8 (9) 188 (55.8) 89 (66.9) 99 (48.5) 0.003
 Visiting non-qualified practitioner 12 (26) 85 (25.2) 23 (17.3) 62 (30.4)  
 Self-medication 8 (19) 64 (19.0) 21 (15.8) 43 (21.1)  
Mode of admission
 Direct admission 8 (13) 199 (59.1) 90 (67.7) 109 (53.4) 0.003
 Referred from government hospital 8 (12) 112 (33.2) 40 (30.1) 72 (35.3)  
 Referred from private hospital 15 (24) 26 (7.7) 3 (2.3) 23 (11.3)  
Medical history/ risk factors
 Smoking 8 (15) 206 (61.1) 82 (61.7) 124 (60.8) 0.873
 Sedentary lifestyle 8 (12) 111 (32.9) 44 (33.1) 67 (32.8) 0.964
 Diabetes mellitus 6 (19) 99 (29.4) 49 (36.8) 50 (24.5) 0.015
 Hypertension 8 (15) 225 (66.8) 92 (69.2) 133 (65.2) 0.449
 Previous history of chest pain 6 (9) 83 (24.6) 43 (32.3) 40 (19.6) 0.008
 Previous history of stroke 31 (19) 9 (2.7) 0 (0.0) 9 (4.4) 0.013
 Family history of myocardial infarction 6 (8) 115 (34.1) 58 (43.6) 57 (27.9) 0.003