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Table 1 Baseline clinical and demographic characteristics stratified by the total ischemic time

From: Time to think beyond door to balloon time: significance of total ischemic time in STEMI

Characteristics Total Total ischemic time (min) p value
Up to 120 121 to 240 More than 240
Total 5730 418 (7.3%) 2199 (38.4%) 3113 (54.3%)
Age (years)
 Median [IQR] 55 [61–48] 52.5 [60–45] 55 [60–47] 55 [62–48] < 0.001*
 Up to 40 years 608 (10.6%) 53 (12.7%) 234 (10.6%) 321 (10.3%) 0.025*
 41 to 50 years 1675 (29.2%) 139 (33.3%) 657 (29.9%) 879 (28.2%)  
 51 to 60 years 2004 (35%) 147 (35.2%) 767 (34.9%) 1090 (35%)  
 > 60 years 1443 (25.2%) 79 (18.9%) 541 (24.6%) 823 (26.4%)  
Gender
 Male 4637 (80.9%) 369 (88.3%) 1832 (83.3%) 2436 (78.3%) < 0.001*
 Female 1093 (19.1%) 49 (11.7%) 367 (16.7%) 677 (21.7%)  
Medical history
 Diabetes 1712 (29.9%) 123 (29.4%) 616 (28%) 973 (31.3%) 0.039*
 Hypertension 2978 (52%) 195 (46.7%) 1123 (51.1%) 1660 (53.3%) 0.021*
 Smoke 1636 (28.6%) 122 (29.2%) 647 (29.4%) 867 (27.9%) 0.438
 Family history 263 (4.6%) 20 (4.8%) 89 (4%) 154 (4.9%) 0.298
KILLIP class
 I 5070 (88.5%) 376 (90%) 1977 (89.9%) 2717 (87.3%) 0.009*
 II 287 (5%) 16 (3.8%) 111 (5%) 160 (5.1%)  
 III 159 (2.8%) 9 (2.2%) 43 (2%) 107 (3.4%)  
 IV 214 (3.7%) 17 (4.1%) 68 (3.1%) 129 (4.1%)  
Symptom onset to hospital arrival time (min)
 Median [IQR] 180 [300–120] 60 [60–30] 120 [160–120] 283 [385–240] < 0.001*
Door to balloon time (min)
 Median [IQR] 60 [75–45] 45 [55–37] 55 [71–45] 65 [75–49] < 0.001*
Total ischemic time (min)
 Median [IQR] 255 [355–180] 101 [110–85] 185 [213–165] 341 [446–285] < 0.001*
  1. IQR interquartile range
  2. *Significant at 5%