Table 2 Characteristics of first time myocardial infarction patients according to total pre-hospital delay
Characteristics | Median Pre-hospital delay (IQR) (hours) | Total (n = 337) | ≤6 h (n = 133) | > 6 h (n = 204) | P-value |
|---|---|---|---|---|---|
Age, mean (SD) | Â | 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 |