Table 2.
Patient-related characteristics of non-matched and matched cohorts of patients with out-of-hospital cardiac arrest according to the type of bystander cardiopulmonary resuscitation, Vietnam, February 2014–December 2018.
| Variables | Before matching | After matching | ||||||
|---|---|---|---|---|---|---|---|---|
| All cases (n = 521) | No bystander CPR (n = 406) | Bystander CPR (n = 115) |
P-valuea | All cases (n = 212) | No bystander CPR (n = 106) | Bystander CPR (n = 106) |
P-valueb | |
| Hospital participated | ||||||||
| Hospital | 0.03 | 0.14 | ||||||
| Bach Mai, no. (%) | 396 (76.0) | 306 (75.4) | 90 (78.3) | 176 (83.0) | 91 (85.8) | 85 (80.2) | ||
| Hue, no. (%) | 24 (4.6) | 24 (5.9) | 0 (0.0) | 2 (0.9) | 2 (1.9) | 0 (0.0) | ||
| Cho Ray, no. (%) | 101 (19.4) | 76 (18.7) | 25 (21.7) | 34 (16.0) | 13 (12.3) | 21 (19.8) | ||
| Patient-related | ||||||||
| Age (year), mean (SD) | 56.7 (17.3) | 57.6 (17.2) | 53.7 (17.6) | 0.04 | 56,6 (17.5) | 60.0 (16.6) | 53.1 (17.8) | <.001 |
| Gender (male), no. (%) | 388 (74.5) | 305 (75.10 | 83 (72.2) | 0.52 | 154 (72.6) | 78 (73.6) | 76 (71.7) | 0.76 |
| Past medical history, no. (%), n1 = 470c | ||||||||
| Heart disease | 85 (18.1) | 60 (16.5) | 25 (23.6) | 0.10 | 38 (17.9) | 13 (12.3) | 25 (23.6) | 0.03 |
| Diabetes | 64 (13.6) | 46 (12.6) | 18 (17.00 | 0.30 | 30 (14.2) | 12 (11.3) | 18 (17.0) | 0.24 |
| Cancer | 38 (8.1) | 34 (9.3) | 4 (3.8) | 0.06 | 11 (5.2) | 7 (6.6) | 4 (3.8) | 0.35 |
| Hypertension | 111(23.6) | 85 (23.4) | 26 (24.5) | 0.80 | 47 (22.2) | 21 (19.8) | 26 (24.5) | 0.41 |
| Renal disease | 38 (8.1) | 27 (7.4) | 11 (10.4) | 0.33 | 15 (7.1) | 4 (3.8) | 11 (10.4) | 0.06 |
| Respiratory disease | 75 (16.0) | 53 (14.6) | 22 (20.8) | 0.13 | 37 (17.5) | 15 (14.2) | 22 (20.8) | 0.21 |
| Hyperlipidemia | 4 (0.9) | 4 (1.1) | 0 (0.0) | 0.58 | 0 (0.0) | 0 (0.0) | 0 (0.0) | NA |
| Stroke | 16 (3.4) | 15 (4.1) | 1 (0.9) | 0.14 | 6 (2.8) | 5 (4.7) | 1 (0.9) | 0.21 |
| HIV | 1 (0.2) | 1 (0.3) | 0 (0.0) | > 0.99 | 0 (0.0) | 0 (0.0) | 0 (0.0) | NA |
a
The comparison between patients who did not receive bystander CPR and who received bystander CPR in the non-matched cohort.
b
The comparison between patients who did not receive bystander CPR and who received bystander CPR in the matched cohort.
c
n1 was defined as the total number of patients recorded if a variable was given or not in the non-matched cohort.
CPR, cardiopulmonary resuscitation; NA, not available.