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Table 1 Baseline characteristics of the study patients

From: Factors associated with initiation of medical advanced cardiac life support after out-of-hospital cardiac arrest

  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