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Table 4 Influence of relevant factors on absolute pain reduction 30 min after ultrasound-guided regional anesthesia

From: Emergency physician-performed ultrasound-guided nerve blocks in proximal femoral fractures provide safe and effective pain relief: a prospective observational study in The Netherlands

Factors Mean difference 95% CI p value
t test    
 Gender (male, female) − 0.03 − 1.48–1.42 0.97
 Laterality (left, right) − 0.55 − 1.95–0.85 0.43
 Prehospital analgesics (no, yes) 0.96 − 3.56–5.47 0.57
 Block type (femoral nerve, FICB) 1.25 − 0.32–2.81 0.11
 Ropivacaine concentration (0.375%, 0.75%) − 0.13 − 1.56–1.30 0.43
One-way ANOVA    
 Fracture type (femoral neck, trochanteric, femoral shaft)    0.10
Correlation Pearson’s r   
 Age − 0.063   0.32
 Volume of ropivacaine 0.375% − 0.230   0.14
 Volume of ropivacaine 0.75% − 0.078   0.33
  1. Mean difference is without dimension because it is the absolute reduction in pain score on a 0–10 numeric rating scale. A positive difference indicates the pain score reduction is larger in a variable’s second value
  2. FICB fascia iliaca compartment block