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) | 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 |