Retrospective Study
Copyright ©The Author(s) 2021.
World J Clin Cases. Aug 6, 2021; 9(22): 6300-6307
Published online Aug 6, 2021. doi: 10.12998/wjcc.v9.i22.6300
Table 3 Significant analysis of foreign standard groups

Mean values
SD
t
Degree of freedom
Significance (two tail)
Differences of vertical height7.509266.243538.838530.000
Differences of horizontal height0.766674.960301.136530.261