Skip to main content

Table 1 Summary statistics and the results of the tests for comparing groups for demographic variables

From: Real-time compression feedback for patients with in-hospital cardiac arrest: a multi-center randomized controlled clinical trial

Variable Total (n = 900) Intervention (n = 450) Control (n = 450) Significance
Mean ± SD N (%) Mean ± SD N (%) Mean ± SD N (%) P value
Age 57.42 (5.81)   57.26 (5.44)   57.57 (6.16)   0.72a
ICU length of stay (days) 25.82 (10.88)   26.95 (10.82)   24.69 (10.84)   < 0.001a
Nurse ICU experience (years) 21.47 (4.70)   21.48 (5.13)   21.46 (4.24)   0.27a
Sex, female   546 (60.7%)   274 (60.9%)   272 (60.4%) 0.89b
Intubated prior to CPR event, Yes   368 (40.9%)   176 (39.1%)   192 (42.7%) 0.28 b
Intubated during CPR event, Yes     34 (7.6%)   36 (8%) 0.83 b
Multi-organ dysfunction, Yes   438 (48.7%)   210 (46.7%)   228 (50.7%) 0.23 b
  1. aMann–Whitney U test
  2. bChi-square test