Fig. 2
From: A new PHQ-2 for Chinese adolescents: identifying core items of the PHQ-9 by network analysis
Bootstrapped difference test for node strengths. Note. The figure shows per centrality measures the difference test (with an alpha of 0.05) between the estimated and bootstrapped node strength. Black boxes indicate that node strength differ significantly, while gray boxes indicate no significant difference. The numbers in the white boxes refer to the raw value of the node strength