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Table 2 Statistical comparison of force values for 2 cm tube displacement

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

Comparison of force values at 2 cm displacement (N)

 

SolidAIRity®

Thomas™

Anchor Fast

Tape & Malllinckrodt

Twill & Mallinckrodt

Tape & Securisyn

Twill & Securisyn

 

SolidAIRity®

 

0.000

0.000

0.000

0.000

0.000

0.000

P values

Thomas™

97 [61.99; 126.68]

 

0.320

0.057

0.001

0.009

0.957

Anchor Fast

91 [55.90; 120.00]

-6 [-19.37; 6.60]

 

0.188

0.000

0.052

0.296

Tape & Malllinckrodt

83 [42.52; 110.28]

-14 [-36.48; 0.62]

-8 [-29.49; 6.40]

 

0.001

0.887

0.053

Twill & Mallinckrodt

117 [82.75; 145.84]

20 [8.83; 31.10]

26 [16.70; 36.02]

34 [20.90; 54.88]

 

0.000

0.000

Tape & Securisyn

78 [42.84; 107.46]

-19 [-33.13; -5.24]

-12 [-25.74; 0.15]

-5 [-19.76; 17.25]

-39 [-50.31; -27.98]

 

0.006

Twill & Securisyn

97 [61.99; 126.00]

0 [-13.18; 12.50]

6 [-5.63; 17.72]

14 [-0.27; 35.45]

-20 [-29.75; -10.86]

18 [6.04; 31.64]

  
 

Difference between means and 95% confidence interval

 

Difference in standard deviation of means at 2 cm displacement

 

SolidAIRity®

Thomas™

Anchor Fast

Tape & Malllinckrodt

Twill & Mallinckrodt

Tape & Securisyn

Twill & Securisyn

 

SolidAIRity®

 

0.481

0.027

0.166

0.211

0.124

0.074

P values

Thomas™

2.27 [-4.30; 8.85]

 

0.068

0.030

0.522

0.022

0.212

Anchor Fast

6.33 [0.822; 11.85]

4.06 [-0.35; 8.47]

 

0.001

0.288

0.001

0.223

Tape & Malllinckrodt

-5.00 [-12.23; 2.22]

-7.28 [-13.81; -0.75]

-11.3 [-16.79; -5.89]

 

0.008

0.840

0.002

Twill & Mallinckrodt

4.08 [-2.48; 10.64]

1.8 [-3.93; 7.54]

-2.26 [-6.64; 2;12]

9.08 [2.56; 15.60]

 

0.006

0.652

Tape & Securisyn

-6.64 [-13.16; 1.69]

-8.91 [-14.76; -1.26]

-12.97 [-17.81; -6.33]

-1.63 [-8.11; 6.65]

-10.72 [-16.55; -3.08]

 

0.001

Twill & Securisyn

5.06 [-0.55; 10.66]

2.8 [-1.75; 7.32]

-1.28 [-3.40; 0.84]

10.06 [4.51; 15.61]

0.98 [-3.53; 5.48]

11.7 [4.96; 16.62]

  
 

Difference between means and 95% confidence interval

 
  1. Statistical analysis of force values averaged across all test points for each fixation technique at 2 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 (p < 0.05) are listed in bold.