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. 2021 Aug 20;92(1):80–86. doi: 10.2319/122820-1037.1

Table 3.

Mann-Whitney U-Test Results of SLP Analysis of Invisalign and Fixed Groups at T0, T1, and T2 a


Invisalign Group (n = 24)
Fixed Group (n = 20)
P Value
Min
Max
Mean
SD
Min
Max
Mean
SD
T0 1 2 1.08 0.27 1 2 1.18 0.40 .24
T1 1 4 1.58 0.65 1 4 1.39 0.62 .02**
T2 1 3 1.44 0.51 1 3 1.23 0.46 <.01**
a

Max indicates maximum; min, minimum; SD, standard deviation; SLP, speech and language pathologist.

** 

Significant by the Student's t-test at P < .01.