Skip to main content

Table 4 (A-D) Regression analysis of pre-defined variables during pre- and postoperative ultrasound examination

From: The effects of shoulder arthroscopy on ultrasound image quality of the interscalene brachial plexus: a pre-procedure vs post-procedure comparative study

 

Parameter estimate

p-value

A) Pre-op, ultrasound visualization

 (Intercept)

4.814

 

 Age

0.001

0.841

 Female vs Male

−0.090

0.546

 Obese vs Normala

−0.524

0.022

 Overweight vs Normala

−0.433

0.009

B) Post-op, ultrasound visualization

 (Intercept)

4.458

 

 Age

0.003

0.772

 Female vs Male

−0.236

0.431

 Obese vs Normala

−0.358

0.320

 Overweight vs Normala

−0.135

0.627

 Duration (per 10 min)

−0.086

0.051

 Fluid (per liter)

0.005

0.668

C) Pre-op, Confidence in ISB

 (Intercept)

5.186

 

 Age

−0.004

0.158

 Female vs Male

−0.179

0.089

 Obese vs Normala

−0.293

0.140

 Overweight vs a Normal

−0.017

0.800

D) Post-op, Confidence in ISB

 (Intercept)

5.666

 

 Age

−0.011

0.355

 Female vs Male

−0.399

0.215

 Obese vs Normala

−0.405

0.372

 Overweight vs a Normal

−0.276

0.385

 Duration (per 10 min)

−0.051

0.329

 Fluid (per liter)

−0.004

0.814

  1. ISB Interscalene nerve block
  2. aBMI classifications: Normal (18.5–24.9), Overweight (25.0–29.9), Obese (≥ 30.0)