Table 1 Demographic and clinical characteristics
|  | Total (n = 302) | HbA1c ≤6% (n = 200) | HbA1c > 6% (n = 102) | p |
|---|---|---|---|---|
Demographic characteristics | ||||
 Male, n (%) | 207 (68.5) | 139 (69.5) | 68 (66.7) | 0.62 |
 Age, years, median (IQR) | 61 (49–72) | 57.0 (45–70) | 67.5 (56–75) | < 0.001 |
Underlying disease, n (%) | ||||
 Acute myocardial infarction | 17 (5.6) | 9 (4.5) | 8 (7.8) | 0.23 |
 Previous cardiac arrest | 1 (0.3) | 1 (0.5) | 0 (0.0) | 1.00 |
 Angina | 34 (11.3) | 20 (10.0) | 14 (13.7) | 0.34 |
 Congestive heart failure | 20 (6.6) | 9 (4.5) | 11 (10.8) | 0.05 |
 Hypertension | 123 (40.7) | 64 (32.0) | 59 (57.8) | < 0.001 |
 Cerebrovascular accident | 23 (7.6) | 9 (4.5) | 14 (13.7) | 0.004 |
 Diabetes mellitus | 75 (24.8) | 17 (8.5) | 58 (56.9) | < 0.001 |
 Lung disease | 29 (9.6) | 20 (10.0) | 9 (8.8) | 0.84 |
 Neurological disease | 21 (7.0) | 12 (6.0) | 9 (8.8) | 0.35 |
 Renal disease | 27 (8.9) | 12 (6.0) | 15 (14.7) | 0.02 |
 Liver cirrhosis | 5 (1.7) | 4 (2.0) | 1 (1.0) | 0.67 |
 Malignancy | 17 (5.6) | 12 (6.0) | 5 (4.9) | 0.80 |
Cardiac arrest characteristics | ||||
 Shockable rhythm, n (%) | 199 (65.9) | 127 (63.5) | 72 (70.6) | 0.25 |
 Witnessed arrest, n (%) | 114 (37.7) | 81 (40.5) | 33 (32.4) | 0.21 |
 Bystander CPR, n (%) | 147 (48.7) | 101 (50.5) | 46 (45.1) | 0.40 |
 Anoxic time, min, median (IQR) | 30 (17–42) | 30 (17–43) | 30 (17–40) | 0.88 |
Glucose-related variables | ||||
 Initial glucose level, mg/dL, median (IQR) | 240 (70–521) | 227 (72–414) | 274 (70–648) | < 0.001 |
 Glucose level variability within 48 h, Δ glucose, median (IQR) | 140 (90–208) (n = 237) | 135 (81.5–187) (n = 164) | 154 (120.8–249.8) (n = 73) | 0.004 |