Table 3

Comorbidity in relation to whether bystander CPR was performed before the arrival of EMS or not.

Bystander CPR
All patients
(n=11 955)
Yes
(n=8510)
No
(n=3445)
P valueStandardised difference*
Comorbidity within 5 years before OHCA
 Myocardial infarction2915 (24.4)2040 (24.0)875 (25.4)0.100.03
 Congestive heart failure3441 (28.9)2350 (27.6)1091 (31.7)<0.00010.09
 Peripheral vascular disease1356 (11.3)925 (10.9)431 (12.5)0.010.05
 Cerebrovascular disease1713 (14.3)1227 (14.4)486 (14.1)0.690.01
 Dementia736 (6.2)519 (6.1)217 (6.3)0.670.01
 Chronic pulmonary disease2240 (18.7)1495 (17.6)745 (21.6)<0.00010.10
 Connective tissue disorder/rheumatic disease650 (5.4)455 (5.3)195 (5.7)0.500.01
 Peptic ulcer disease355 (3.0)237 (2.8)118 (3.4)0.070.04
 Mild liver disease344 (2.9)243 (2.9)101 (2.9)0.810.00
 Diabetes without complications2715 (22.7)1857 (21.8)858 (24.9)0.00030.07
 Diabetes with complications1139 (9.5)791 (9.3)348 (10.1)0.180.03
 Paraplegia/hemiplegia281 (2.4)201 (2.4)80 (2.3)0.950.00
 Renal disease1143 (9.6)772 (9.1)371 (10.8)0.0050.06
 Cancer2065 (17.3)1428 (16.8)637 (18.5)0.030.04
 Metastatic carcinoma525 (4.4)352 (4.1)173 (5.0)0.030.04
 Moderate or severe liver disease71 (0.6)37 (0.4)34 (1.0)0.00090.07
 AIDS/HIV10 (0.1)5 (0.1)5 (0.1)0.160.03
Charlson Comorbidity Index (CCI)
 Points2 (0, 6)2 (0, 6)2 (0, 6)<0.00010.14
 Mean±SD2.3±2.42.2±2.32.5±2.4
  • Results presented as number (%) or median (10th, 90th percentiles), unless otherwise stated.

  • *Standardised difference between the two groups.

  • CPR, cardiopulmonary resuscitation; EMS, emergency medical services; OHCA, out-of-hospital cardiac arrest.