The cost-utility of screening for depression in primary care.
BACKGROUND
Depressive disorders are common in primary care and cause substantial disability, but they often remain undiagnosed. Screening is a frequently proposed strategy for increasing detection of depression.


OBJECTIVE
To examine the cost-utility of screening for depression compared with no screening.


METHODS
Nonstationary Markov model.


METHODS
The published literature.


METHODS
Hypothetical cohort of 40-year-old primary care patients.


METHODS
Lifetime.


CONCLUSIONS
Health care payer and societal.


METHODS
Self-administered questionnaire followed by provider assessment.


METHODS
Costs and quality-adjusted life-years (QALYs).


RESULTS
Compared with no screening, the cost to society of annual screening for depression in primary care patients is $192 444/QALY. Screening every 5 years and one-time screening cost $50 988/QALY and $32 053/QALY, respectively, compared with no screening. From the payer perspective, the cost of annual screening is $225 467.


RESULTS
Cost-utility ratios are most sensitive to the prevalence of major depression, the costs of screening, rates of treatment initiation, and remission rates with treatment. In Monte Carlo sensitivity analyses, the cost-utility of annual screening is less than $50 000/QALY only 2.2% of the time. In multiway analyses, four model variables must be changed to extreme values for the cost-utility of annual screening to fall below $50 000/QALY, but a change in only one variable increases the cost-utility of one-time screening to more than $50 000/QALY. One-time screening is more robustly cost-effective if screening costs are low and effective treatments are being given.


CONCLUSIONS
Annual and periodic screening for depression cost more than $50 000/QALY, but one-time screening is cost-effective. The cost-effectiveness of screening is likely to improve if treatment becomes more effective.
Valenstein
M
M
Health Services Research and Development, Department of Veterans Affairs Medical Center, Box 130170, Ann Arbor, MI 48113-0170, USA.
Vijan
S
S
Zeber
J E
JE
Boehm
K
K
Buttar
A
A
D000328:Adult; D003362:Cost-Benefit Analysis; D003866:Depressive Disorder / Q000175:diagnosis* / Q000453:epidemiology / Q000628:therapy; D017048:Health Care Costs; D006801:Humans; D015994:Incidence; D008390:Markov Chains; D008403:Mass Screening / Q000191:economics* / Q000379:methods; D010818:Practice Patterns, Physicians'; D015995:Prevalence; D011320:Primary Health Care / Q000191:economics*; D019057:Quality-Adjusted Life Years; D012680:Sensitivity and Specificity; D011795:Surveys and Questionnaires; D014481:United States / Q000453:epidemiology