Factors Associated with High-Quality Cardiopulmonary Resuscitation Performed by Bystander

Table 2

Univariate and multivariate analyses of the influence of resuscitation variables on high-quality CPR performed by a bystander.

	OR (95% CI)	aOR (95% CI)
Patients’ elements
Age, year	0.98 (0.97–0.99)	1.00 (0.99–1.01)
Male	1.74 (1.18–2.58)	1.38 (0.91–2.09)
Occurrence at home	0.33 (0.24–0.47)	0.42 (0.27–0.64)
Witnessed	1.57 (1.11–2.20)	1.45 (1.03–2.06)
Bystander elements
Relation with patient, family	0.37 (0.26–0.54)	0.77 (0.47–1.27)
Age groups
<40 years	4.46 (2.40–8.28)	4.28 (2.24–8.17)
40–49 years	3.69 (2.03–6.74)	3.34 (1.80–6.176)
50–59 years	3.06 (1.72–5.46)	3.01 (1.68–5.39)
≥60 years	1	1

CPR, cardiopulmonary resuscitation; CI, confidence interval; OR, odds ratio; aOR, adjusted odds ratio.