A new PHQ-2 for Chinese adolescents: identifying core items of the PHQ-9 by network analysis

Table 2 Reliability and validity of the PHQ-2 N and PHQ-2

	Sample 1						Sample 2
	Male			Female			Male			Female
	PHQ-9	PHQ-2 N	PHQ-2	PHQ-9	PHQ-2 N	PHQ-2	PHQ-9	PHQ-2 N	PHQ-2	PHQ-9	PHQ-2 N	PHQ-2
Internal consistency
McDonald’s ω	0.911	0.797	0.802	0.915	0.804	0.802	0.897	0.719	0.703	0.908	0.757	0.737
Cronbach’s α	0.909	0.797	0.802	0.914	0.803	0.802	0.896	0.718	0.704	0.907	0.758	0.738
Greatest Lower Bound	0.931	0.797	0.802	0.935	0.803	0.802	0.915	0.718	0.704	0.928	0.758	0.738
Criterion validity (correlations with criterion measures)
PHQ-9	/	0.876	0.880	/	0.892	0.884	/	0.849	0.859	/	0.886	0.885
GAD-7 (anxiety)	0.765	0.696	0.678	0.810	0.744	0.725	0.681	0.606	0.601	0.739	0.672	0.659
IAT (internet addiction)	0.424	0.359	0.366	0.483	0.425	0.422	0.402	0.351	0.359	0.490	0.449	0.441
CD-RISC-10 (resilience)	−0.329	−0.292	−0.303	−0.42	−0.379	−0.388	−0.162	−0.138	−0.144	−0.284	−0.254	−0.255
PYD-VSF (positive youth development)	−0.424	−0.379	−0.382	−0.521	−0.472	−0.471	−0.323	−0.278	−0.288	−0.415	−0.375	−0.381

ISSN: 1753-2000