종속 변수가 연속 변수인 경우, 집단 간 평균비교를 시행하였으며, 질적 변수인 경우에는 χ2검정을 시행하였다.
When the dependent variable was a continuous variable, the mean comparison was performed between groups, and in the case of a qualitative variable, the χ2 test was performed.