Table 1.
Demographic characteristics
| All Subjects | Public B-CPR Yes | Public B-CPR No | p-value | Home B-CPR Yes | Home B-CPR No | p-value | |
|---|---|---|---|---|---|---|---|
| N | 19,331 | 1,444 (44%) | 1,853 (56%) | 5,564 (35%) | 10,224 (65%) | ||
| Male | 12,225 (63%) | 1,170 (81%) | 1,430 (77%) | * | 3,364 (60%) | 6,085 (60%) | * |
| Site | * | * | |||||
| A | 1,032 (6%) | 52 (3%) | 104 (6%) | 196 (4%) | 660 (6%) | ||
| B | 5,324 (28%) | 310 (22%) | 550 (30%) | 1,153 (21%) | 3,268 (32%) | ||
| C | 2,604 (13%) | 103 (7%) | 247 (13%) | 302 (5%) | 1,914 (19%) | ||
| D | 1,607 (8%) | 146 (10%) | 157 (8%) | 412 (7%) | 880 (8%) | ||
| E | 2,244 (12%) | 196 (14%) | 120 (6%) | 1,014 (18%) | 894 (9%) | ||
| F | 2,571 (13%) | 237 (16%) | 271 (15%) | 834 (15%) | 1,187 (12%) | ||
| G | 3,949 (20%) | 400 (28%) | 404 (22%) | 1,653 (30%) | 1,421 (14%) | ||
| Time of day | * | * | |||||
| 11:00pm-5:59am | 3,631 (19%) | 93 (6%) | 219 (12%) | 1,201 (22%) | 2,084 (21%) | ||
| 6:00am-8:59am | 2,650 (14%) | 163 (12%) | 204 (11%) | 754 (14%) | 1,500 (15%) | ||
| 9:00am-3:59pm | 6,601 (34%) | 688 (48%) | 790 (43%) | 1,694 (31%) | 3,328 (33%) | ||
| 4:00pm-6:59pm | 2,919 (15%) | 276 (19%) | 316 (17%) | 845 (15%) | 1,443 (14%) | ||
| 7:00pm-10:59pm | 3,386 (18%) | 214 (15%) | 312 (17%) | 1,024 (18%) | 1,796 (17%) | ||
| Location type | * | * | |||||
| Street, highway | 892 (4%) | 274 (19%) | 618 (33%) | - | - | ||
| Public building | 329 (2%) | 149 (10%) | 180 (10%) | - | - | ||
| Place of recreation | 396 (2%) | 231 (16%) | 165 (9%) | - | - | ||
| Home | 15,788 (82%) | - | - | 5,564 (100%) | 10,224 (100%) | ||
| Other public | 1,680 (9%) | 790 (55%) | 890 (48%) | - | - | ||
| Other non-public | 150 (1%) | - | - | - | - | ||
| Age, years | * | * | |||||
| 18–29 | 756 (4%) | 47 (4%) | 80 (5%) | 273 (5%) | 338 (4%) | ||
| 30–39 | 1,099 (6%) | 66 (5%) | 145 (8%) | 334 (6%) | 537 (5%) | ||
| 40–49 | 1,985 (10%) | 186 (13%) | 245 (13%) | 593 (11%) | 926 (9%) | ||
| 50–59 | 3,714 (19%) | 328 (23%) | 470 (25%) | 1,075 (19%) | 1,781 (17%) | ||
| 60–69 | 4,335 (22%) | 419 (29%) | 487 (26%) | 1,195 (22%) | 2,185 (21%) | ||
| 70–79 | 3,419 (18%) | 241 (17%) | 240 (13%) | 968 (17%) | 1,935 (19%) | ||
| 80+ | 4,012 (21%) | 156 (11%) | 185 (10%) | 1,125 (20%) | 2,520 (25%) | ||
| Race | * | * | |||||
| White, non-Hispanic | 6,349 (33%) | 516 (36%) | 557 (30%) | 2,035 (37%) | 3,164 (31%) | ||
| Black, non-Hispanic | 3,148 (16%) | 108 (7%) | 301 (16%) | 537 (10%) | 2,173 (21%) | ||
| Hispanic | 872 (5%) | 59 (4%) | 83 (4%) | 194 (3%) | 524 (5%) | ||
| Other | 629 (3%) | 38 (3%) | 47 (3%) | 253 (4%) | 283 (3%) | ||
| Unknown | 8,333 (43%) | 723 (50%) | 865 (47%) | 2,545 (46%) | 4,080 (40%) | ||
| Not Witnessed | 10,419 (57%) | 340 (24%) | 817 (46%) | * | 2,934 (54%) | 6,239 (65%) | * |
| Time from initial call (min) | |||||||
| First arrival of EMS (min) | 5.27 ± 2.35 | 5.18 ± 2.63 | 4.78 ± 2.34 | * | 5.61 ±2.43 | 5.20 ±2.23 | * |
| First arrival EMS ≤4 min- no (%) | 5,673 (30%) | 480 (34%) | 745 (42%) | * | 1,174 (22%) | 3,114 (32%) | * |
| First EMS Compression (min) | 7.78 ± 3.43 | 7.40 ± 3.72 | 7.60 ± 4.61 | - | 7.83 ± 2.98 | 7.82 ± 3.29 | - |
| Initial rhythm | * | * | |||||
| Shockable (VF/pVT) | 4,474 (24%) | 760 (55%) | 691 (38%) | 1,297 (23%) | 1,647 (16%) | ||
| Non-shockable (PEA/Aystole) | 14,385 (75%) | 595 (44%) | 1,111 (61%) | 4,169 (76%) | 8,361 (83%) | ||
| Cannot determine | 199 (1%) | 17 (1%) | 17 (1%) | 46 (1%) | 114 (1%) | ||
| ROSC present at arrival to ED | * | * | |||||
| Yes | 5,531 (47%) | 664 (55%) | 629 (43%) | 1,752 (54%) | 2,397 (42%) | ||
| Survival at hospital discharge | * | * | |||||
| Yes | 2,261 (12%) | 475 (33%) | 374 (20%) | 666 (12%) | 690 (7%) |
*
p-value: denotes significance, chi-squared applied to categorical variables and t-test to continuous variables