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International Journal of Bipolar Disorders

Table 1 Studies evaluating the economic impact of misdiagnosing BD as MDD, as represented by mean annual per-patient costs

From: Using decision-analysis modelling to estimate the economic impact of the identification of unrecognised bipolar disorder in primary care: the untapped potential of screening

Added annual cost of misdiagnosis studies

Study

N

Year of collection

Correctly diagnosed

Misdiagnosed

Relative costs

RBP

MDD

UBP

UBP vs. RBP

UBP vs. MDD

Li et al. (2002)*

3349

1994–1999

–

–

–

$5044

–

Shi et al. (2004)*

25,460

1993–1999

–

–

–

$682

$995

Matza et al. (2005)

2307

2000

$8600

$7288

$8761

$161

$1373

Birnbaum et al. (2003)

9009

1998–2001

$9612

$7020

$14,148

$4536

$7128

McCombs et al. (2007)*

14,809

1993–2004

–

–

–

$2316

$1681

  1. Relative costs show the difference in costs between correctly diagnosed patients and UBP. Reported costs reflect values as published in the respective studies and have not been adjusted for inflation. N: Sample size; BD: Bipolar disorder; MDD: Major depressive disorder; RBP: Recognised bipolar disorder patients; UBP: Unrecognised bipolar disorder patients
  2. *Studies using Medi-Cal data
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