highly significantP < 0.001
Longitudinal mental health trajectories In the quantitative analysis, changes of the PHQ-4 score and the PHQ-2 subscale score were highly significant [cohen's d = 0.16 total, (subscale 0.18), ( t (740) = 4.24, (4.99), P < 0.001 each] whereas the change in the GAD-2 subscale was less pronounced [cohen's d = 0.08, t (740) = 2.13, P = 0.03] ( Table 2 ).