Incremental decreases in quality-adjusted life years (QALY) associated with higher levels of depressive symptoms for U.S. Adults aged 65 years and older

Table 2 EQ-5D index, Mortality Rate, and Quality-adjusted Life Years (QALY) throughout remainder of lifetime by Depressive Symptom Severity Categories, U.S. Adults Aged 65 Years and Older

PHQ-9 score	Depression severity categories	Number	EQ-5D^a	S.E.	Mortality rate^b	S.E.	QALY^c	S.E.
0–27	Total	3,680	0.827	0.005	3.51	0.18	12.3	1.1
0–4	None-minimal	2,863	0.875	0.004	2.99	0.18	14.0	1.4
5–9	Mild	494	0.680	0.018	4.69	0.60	7.8	1.0
10–14	Moderate	122	0.482	0.038	4.97	1.11	4.7	0.7
15–27	Moderately severe/ severe	51	0.353	0.063	8.15	2.81	3.3	1.3

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