Statistically significant factors related to stress disorder caused by COVID-19 include: keeping extracurricular activities reduced students' stress disorder (aOR, 0.68; 95% CI, 0.49 - 0.94); students whose parents did not change their academic pressure had less risk for RLCT (aOR, 0.65; 95% CI, 0.43 - 0.98); social support at a medium level would reduce the risk for RLCT (aOR, 0.63; 95% CI, 0.47 - 0.97).