TABLE 5.

Spearman’s rho correlations between total and individual PHQ-9 items for the unipolar (high) and bipolar semantic similarity scales for depression.

PHQ-9	M	SD	Item total correlation	Unipolar SSS depression	Bipolar SSS depression
Total	8.41	6.69		0.24***	0.60***
Item 1 (little interest)	0.95	0.96	0.77***	0.20***	0.53***
Item 2 (feeling down)	1.01	0.99	0.80***	0.27***	0.61***
Item 3 (disrupted sleep)	1.16	1.02	0.67***	0.26***	0.49***
Item 4 (little energy)	1.26	0.99	0.72***	0.31***	0.55***
Item 5 (changed food habits)	0.91	1.00	0.74***	0.23***	0.50***
Item 6 (failure)	1.03	1.03	0.78***	0.16**	0.50***
Item 7 (no concentration)	0.93	1.02	0.77***	0.11*	0.44***
Item 8 (slow or restless)	0.58	0.87	0.62***	0.08	0.31***
Item 9 (self-harm)	0.58	0.93	0.68***	0.5	31***

N = 411.

*Indicates p < 0.05; **indicates p < 0.01; ***indicates p < 0.001.

M and SD are the mean and standard deviation, respectively.

PHQ-9, Patient Health Questionaire-9; SSS, Semantic Similarity Scale.