Table 3 Nominal logistic regression for needle shaft visibility
Term | Estimate | Std Error | ChiSquare | Prob > ChiSq | Lower 95% | Upper 95% |
|---|---|---|---|---|---|---|
Intercept | 5.48 | 0.30 | 340.24 | < 0.0001* | 4.92 | 6.09 |
tissue[cadaver 1] | -2.47 | 0.29 | 73.12 | < 0.0001* | -3.05 | -1.92 |
tissue[cadaver 2] | -0.55 | 0.25 | 4.63 | 0.0314* | -1.05 | -0.05 |
tissue[cadaver 3] | -2.39 | 0.29 | 69.53 | < 0.0001* | -2.97 | -1.84 |
tissue[cadaver 4] | 0.42 | 0.25 | 2.91 | 0.09 | -0.06 | 0.91 |
tissue[cadaver 5] | 0.15 | 0.25 | 0.36 | 0.55 | -0.34 | 0.64 |
tissue[cadaver 6] | 1.22 | 0.25 | 23.91 | < 0.0001* | 0.74 | 1.72 |
tissue[cadaver 7] | 1.36 | 0.25 | 29.09 | < 0.0001* | 0.87 | 1.85 |
tissue[cadaver 8] | 1.49 | 0.25 | 34.67 | < 0.0001* | 1.00 | 1.99 |
tissue[cadaver 9] | 0.83 | 0.25 | 11.07 | 0.0009* | 0.34 | 1.32 |
needle[SonoPlex Stim Facet] | 0.26 | 0.25 | 1.07 | 0.30 | -0.23 | 0.74 |
needle[SonoPlex Stim Sprotte] | 1.13 | 0.25 | 20.48 | < 0.0001* | 0.64 | 1.62 |
needle[SonoTAP Facet] | 0.86 | 0.25 | 12.11 | 0.0005* | 0.38 | 1.35 |
needle[SpinoStar BallPen] | -0.73 | 0.26 | 8.00 | 0.0047* | -1.24 | -0.23 |
needle[SpinoStar PencilPoint] | -0.23 | 0.25 | 0.82 | 0.37 | -0.73 | 0.26 |
needle[SpinoStar Standard Facet] | 0.05 | 0.25 | 0.04 | 0.84 | -0.44 | 0.54 |
needle[StimuPlex D 15°] | -0.44 | 0.25 | 3.01 | 0.08 | -0.94 | 0.05 |
needle[StimuPlex D 30°] | -0.58 | 0.26 | 5.21 | 0.0224* | -1.09 | -0.09 |
needle[StimuPlex Ultra] | 0.19 | 0.25 | 0.58 | 0.45 | -0.30 | 0.68 |
bevel orientation[down] | 0.71 | 0.12 | 34.11 | < 0.0001* | 0.47 | 0.95 |
bevel orientation[side] | -0.24 | 0.12 | 3.99 | 0.0457* | -0.47 | -0.01 |
insertion angle (degree) | -0.21 | 0.01 | 394.72 | < 0.0001* | -0.23 | -0.19 |