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Table 3 Statistical comparison of force values for 5 cm tube displacement or failure of fixator

From: Extubation force depends upon angle of force application and fixation technique: a study of 7 methods

Comparison of force values at 5 cm displacement or failure (N)

 

SolidAIRity®

Thomas™

Anchor Fast

Tape & Malllinckrodt

Twill & Mallinckrodt

Tape & Securisyn

Twill & Securisyn

 

SolidAIRity®

 

0.000

0.000

0.000

0.000

0.000

0.007

P values

Thomas™

129 [109.13; 148.41]

 

0.065

0.530

0.651

0.036

0.000

Anchor Fast

107 [82.07; 132.35]

-22 [-44.59; 1.47]

 

0.371

0.032

0.645

0.000

Tape & Malllinckrodt

121 [92.35; 149.00]

-8 [-34.66; 18.46]

13 [-17.01; 43.93]

 

0.365

0.214

0.000

Twill & Mallinckrodt

132 [113.09; 151.53]

4 [-12.39; 19.46]

25 [2.40; 47.49]

12 [-14.66; 37.92]

 

0.019

0.000

Tape & Securisyn

100 [72.22; 128.52]

-28 [-54.78; -2.02]

-7 [-37.17; 23.48]

-20 [-53.13; 12.53]

-32 [-58.04; -5.83]

 

0.002

Twill & Securisyn

42 [12.60; 71.35]

-87 [-114.51; -59.08]

-65 [-96.67; -33.81]

-79 [-112.52; -44.87]

-90 [-117.79; -62.88]

-58 [-92.10; -24.70]

  
 

Difference between means and 95% confidence interval

 

Difference in standard deviation of means at 5 cm displacement or failure

 

SolidAIRity ®

Thomas™

Anchor Fast

Tape & Malllinckrodt

Twill & Mallinckrodt

Tape & Securisyn

Twill & Securisyn

 

SolidAIRity ®

 

0.723

0.311

0.795

0.267

0.002

0.008

P values

Thomas™

0.93 [-4.40; 6.26]

 

0.232

0.969

0.181

0.001

0.006

Anchor Fast

-4.26 [-12.90; 4.36]

-5.19 [-14.00; 3.62]

 

0.273

0.849

0.128

0.140

Tape & Malllinckrodt

0.80 [-5.54; 7.14]

-0.13 [-6.74; 6.49]

5.07 [-4.29; 14.42]

 

0.246

0.003

0.008

Twill & Mallinckrodt

-3.40 [-9.62; 2.81]

-4.33 [-10.83; 2.17]

0.86 [-8.42; 10.14]

-4.21 [-11.5; 3.09]

 

0.035

0.060

Tape & Securisyn

-11.49 [-18.05; -4.92]

-12.42 [-19.25; -5.59]

-7.22 [-16.71; 2.26]

-12.29 [-19.87; -4.71]

-8.08 [-15.56; -0.60]

 

0.857

Twill & Securisyn

-12.32 [-21.00; -3.65]

-13.5 [-22.10; -4.40]

-8.06 [-18.94; 2.82]

-13.12 [-22.51; -3.73]

-8.92 [-18.24; 0.40]

-0.83 [-10.35; 8.69]

  
 

Difference between means and 95% confidence interval

 
  1. Statistical analysis of force values averaged across all test points for each fixation technique at 5 cm measured displacement. Confidence intervals were calculated using the Satterthwaite’s approximation (Welch’s t-test) due to likelihood of unequal variance. Difference values are the result of subtracting the mean value for the method in the row from the mean value for the method in the column (column mean-row mean). Differences showing statistical significance (α < 0.05) are listed in bold.