Independent variables | β | Odds ratio | 95% confidence interval | P value |
---|---|---|---|---|
With ultrasound guidance | 1.98 | 7.3 | 2.0-26.0 | 0.002 |
Venous diameter, per 0.1 mm | 0.38 | 1.5 | 1.1-2.0 | 0.007 |
ASA-PS, per status 1 | −0.86 | 0.4 | 0.2-0.9 | 0.03 |
Age, months | 0.9 | 0.08 | ||
Sex, male/female | 2.6 | 0.2 | ||
Systolic blood pressure, mm Hg | 1.0 | 0.06 | ||
Depth of the vein, mm | 0.7 | 0.42 |