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Table 2 Trial results

From: Dynamic needle tip positioning versus the angle-distance technique for ultrasound-guided radial artery cannulation in adults: a randomized controlled trial

  Technique P Value Relative Risk (95% CI)
DNTP (n = 65) AD (n = 66)
Primary outcome
 First-pass success without posterior wall puncture, % 35 (53.8) 29 (44.6) 0.26a 1.22 (0.86–1.72)
Secondary outcomes
 First-pass success, % 35 (53.8) 39 (59.1) 0.54a 0.90 (0.63–1.27)
 10-min overall success, % 56 (86.2) 53 (80.3) 0.37a 1.22 (0.82–1.81)
 Median cannulation time (IQR), s 79.7 (54–109) 47.6 (25–104) 0.007 b  
 Posterior wall puncture, % 19 (29.2) 37 (56.1%) 0.002 a 0.56 (0.42–0.82)
Number of skin punctures    0.86 a  
 1 50 52   
 2 3 1   
  ≥ 3 12 13   
  1. Abbreviation: IQR interquartile range
  2. aChi-square test
  3. bMann-Whitney U test