Fig. 1.

Decision curve analysis on net benefits gained by significant factors in different areas.

Note: Outside of Wuhan, the factors in the full model (the green solid line) gained better net benefits than those in the basic model (the yellow solid line) across the whole range. In Wuhan, the factors in the full model gained better net benefits than those in the basic model, lower than those in the threshold probabilities of 0.36. ‘C-score’ is the dependent variable of the logistic model, which means the presence of a behavioural disorder when the total score exceeds the cut-off point in the different groups.