Table 4.

Relationships Between COBRA Scores And PHQ-9, SDS Work, SDS Social, SDS Total, SDS Family/Home, PCS, And MCS Scores

			N	Average Rank		Rank Sum
PHQ-9	COBRA ≦14		480	271.14		130,146
	COBRA >14		101	385.4		38,925
	Total		581
SDS work	COBRA ≦14		479	272.3		130,431.5
	COBRA >14		100	374.79		37,478.5
	Total		579
SDS social	COBRA ≦14		479	271.11		129,862
	COBRA >14		100	380.48		38,048
	Total		579
SDS family/home	COBRA ≦14		479	272.67		130,607.5
	COBRA >14		100	373.03		37,302.5
	Total		579
SDS total	COBRA ≦14		479	270.39		129,517.5
	COBRA >14		100	383.93		38,392.5
	Total		579
PCS	COBRA ≦14		479	299.82		143,616
	COBRA >14		100	242.94		24,294
	Total		579
MCS	COBRA ≦14		479	306.97		147,036.5
	COBRA >14		100	208.74		20,873.5
	Total		579
	PHQ-9	SDS Work	SDS Social	SDS Family/Home	SDS Total	PCS	MCS
Mann–Whitney U	14,706	15,471.5	14,902	15,647.5	14,557.5	19,244	15,823.5
Wilcoxon W	130,146	130,431.5	129,862	130,607.5	129,517.5	24,294	20,873.5
Z	−6.265	−5.793	−6.35	−5.944	−6.32	−3.093	−5.341
p	<0.001	<0.001	<0.001	<0.001	<0.001	0.002	<0.001
Grouping variable	COBRA ≦14, COBRA >14

Note: Analysis was conducted using Mann–Whitney U-tests.

Abbreviations: COBRA, Cognitive Complaints in Bipolar Disorder Rating Assessment; PHQ-9, Patient Health Questionnaire-9; SDS, Sheehan disability scale; SF-8, the 8-item-containing Short-Form Health Survey; PCS, physical component summary; MCS, mental component summary.