Table 1 Baseline characteristics of the study patients
Study population | ACLS (n = 1865) | No-ACLS (n = 825) | p value | |
|---|---|---|---|---|
Age (years) | 75 [60–84] | 69 [55–80] | 84 [77–90] | <0.01 |
Sex (% men) | 64 [62–65] | 69 [67–71] | 51 [48–54] | <0.01 |
Witness (%) | 73 [72–75] | 76 [74–78] | 67 [63–70] | <0.01 |
Basic life support (%) | 73 [71–75] | 78 [76–80] | 62 [59–65] | <0.01 |
AED shock (%) | 11 [10–13] | 16 [14–17] | 2 [1–3] | <0.01 |
Location (%) | <0.01 | |||
Home | 69 [67–70] | 66 [64–69] | 81 [78–84] | |
Nursing home | 6 [5–6] | 2 [1–3] | 12 [10–14] | |
Street | 16 [14–17] | 20 [18–22] | 3 [2–4] | |
Office | 2 [1–2] | 2 [1–3] | 0 [0–0] | |
Care facility | 3 [2–3] | 2 [1–3] | 3 [2–4] | |
Other | 5 [4–6] | 7 [6–8] | 2 [1–3] | |
First recorded rhythm (%) | <0.01 | |||
Spontaneous activity | 5 [5–6] | 7 [6–9] | 1 [0–2] | |
Asystole | 88 [87–89] | 83 [82–85] | 99 [98–99] | |
Shockable rhythm | 7 [6–8] | 9 [8–11] | 0 [0–1] | |
Suspected etiology (%) | <0.01 | |||
Respiratory | 28 [26–29] | 27 [25–29] | 29 [26–32] | |
Cardiac | 32 [30–34] | 38 [36–40] | 18 [15–21] | |
Trauma | 5 [4–6] | 7 [6–8] | 1 [1–2] | |
Miscellaneous | 9 [8–10] | 7 [6–8] | 12 [10–15] | |
Unknown | 26 [25–28] | 20 [19–22] | 39 [36–43] | |
No-flow (min) | 10 [2–15] | 5 [1–10] | 15 [8–20] | <0.01 |
Low-flow (BLS) (min) | 7 [0–12] | 7 [2–10] | 7 [0–15] | 0.04 |