“…Categorizations of other covariates at Time 1, such as parental educational attainment ( middle school, high school, and college, defined as the highest level attained by either parent [7,11,20,27]), household income (quartiles [7,28]: low, low-middle, upper middle, and upper), emotional support from parents (continuous; calculated by six items, with higher scores indicating lower support [27]), open conversation with peers (good and bad [7]), being ridiculed or bullied by peers (yes and no [7,28]), and obsession with academic achievement (yes and no [29]) were included in the analysis because of their higher correlations with Time 2 suicidal ideation.…”