Table 1 Log rank test.

From: Larger surface area can reduce nitinol corrosion resistance

Surface area (cm2)

0.10

0.50

1.00

2.00

5.00

10.00

a. Amber oxide

 0.05

0.159

0.003*

0.000*

0.004*

0.000*

0.000*

 0.10

 

0.055

0.000*

0.017*

0.000*

0.000*

 0.50

  

0.031

0.401

0.000*

0.000*

 1.00

   

0.536

0.003*

0.001*

 2.00

    

0.003*

0.002*

 5.00

     

0.337

b. Mechanically polished

 0.05

0.212

0.596

0.122

0.566

0.000*

0.000*

 0.10

 

0.583

0.01

0.11

0.000*

0.000*

 0.50

  

0.046

0.308

0.000*

0.000*

 1.00

   

0.452

0.136

0.000*

 2.00

    

0.003*

0.000*

 5.00

     

0.000*

c. Chemically etched

 0.05

0.067

0.555

0.048*

0.425

0.000*

0.000*

 0.10

 

0.029*

0.001*

0.011*

0.000*

0.000*

 0.50

  

0.193

0.809

0.000*

0.000*

 1.00

    

0.001*

0.000*

 2.00

    

0.000*

0.000*

 5.00

     

0.947

  1. p Values obtained from the log rank test of (a) amber oxide, (b) mechanically polished, and (c) chemically etched samples between multiple surface areas (*statistically significant, p < 0.05).
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