输入以下两种方式代码，均出现错误提示：factor-variable and time-series operators not allowed

sw logistic i.age_yrs2 i.Sex i.edu_cat_n i.jobtypecat_n2 i.civil_status_entry2 i.BMI3 i.PA_MET2 i.smokecat_n i.drink_n i.teahabit_n i.diabete i.hytension i.menopause i.toothbrushfrq2, pe(0.05)

stepwise, pe(.2): logistic periodonts  i.age_yrs2 i.Sex i.edu_cat_n i.jobtypecat_n2 i.civil_status_entry2 i.BMI3 i.PA_MET2 i.smokecat_n i.drink_n i.teahabit_n i.diabete i.hytension i.menopause i.toothbrushfrq2

如果不输入i.就可以跑出来