Patients receiving injectable lidocaine experienced pain that was similar ( @ @ mm ; @ % confidence interval -LSB- CI -RSB- @-@ @ ) to those receiving the transdermal lidocaine/tetracaine patch ( @ mm @ ; @ % CI = @-@ @ ) , p = @ , with a power of @ % to detect a difference of @ mm at p @ ; although this was statistically significant , it was not clinically significant .