various opening parameters. These results were also presented
with 95% confidence intervals. For evaluating correlations between
the consumer satisfaction index and opening parameters, as well as
clinical outcomes, we applied Pearson's correlation coefficient. The
relationship between hand strength and the ability to open a
packaging was calculated using a logistic regression model. All
analyses were done with SPSS 18.0. The level of significance was set
at p ≤0.05.