Abstract
Objective There is little data regarding the accuracy of pregnancy-specific ICD-9-CM codes used to identify patients with venous thromboembolism (VTE). Study design and setting We identified a large cohort of pregnant patients in whom there were one or more pregnancy-specific (600 codes) or standard ICD-9-CM codes (400 codes) for VTE. Charts of these cases were abstracted to determine the presence of objectively documented VTE. Results A total of 214 cases had a code for VTE either during pregnancy or the 6-week postpartum period; 82% had a pregnancy-specific code and 18% a standard code. Overall, 84 (39%, 95% CI=33-46%) had objectively documented VTE. A pregnancy-specific ICD-9-CM for VTE had a positive predictive value (PPV) of 54/174=31% (95% CI=24-38%), whereas standard VTE codes had a PPV of 30 of 38=80% (95% CI=63-99%). A PPV in the range of 95-100% could be attained using other criteria, at the expense of detecting only 28 to 45% of all VTE cases. Conclusions Pregnancy-specific ICD-9-CM codes for VTE have low PPV. Other criteria must be applied to select cases with a high probability of having objectively documented VTE.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 985-988 |
| Number of pages | 4 |
| Journal | Journal of Clinical Epidemiology |
| Volume | 57 |
| Issue number | 9 |
| DOIs | |
| State | Published - Sep 2004 |
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Keywords
- Administrative data
- Epidemiology
- Pregnancy
- Septic pelvic thrombophlebitis
- Thromboembolism
- Venous thrombosis
ASJC Scopus subject areas
- Medicine(all)
- Public Health, Environmental and Occupational Health
- Epidemiology
Cite this
ICD-9-CM codes poorly indentified venous thromboembolism during pregnancy. / White, Richard H; Brickner, Leslea A.; Scannell, Kate A.
In: Journal of Clinical Epidemiology, Vol. 57, No. 9, 09.2004, p. 985-988.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - ICD-9-CM codes poorly indentified venous thromboembolism during pregnancy
AU - White, Richard H
AU - Brickner, Leslea A.
AU - Scannell, Kate A.
PY - 2004/9
Y1 - 2004/9
N2 - Objective There is little data regarding the accuracy of pregnancy-specific ICD-9-CM codes used to identify patients with venous thromboembolism (VTE). Study design and setting We identified a large cohort of pregnant patients in whom there were one or more pregnancy-specific (600 codes) or standard ICD-9-CM codes (400 codes) for VTE. Charts of these cases were abstracted to determine the presence of objectively documented VTE. Results A total of 214 cases had a code for VTE either during pregnancy or the 6-week postpartum period; 82% had a pregnancy-specific code and 18% a standard code. Overall, 84 (39%, 95% CI=33-46%) had objectively documented VTE. A pregnancy-specific ICD-9-CM for VTE had a positive predictive value (PPV) of 54/174=31% (95% CI=24-38%), whereas standard VTE codes had a PPV of 30 of 38=80% (95% CI=63-99%). A PPV in the range of 95-100% could be attained using other criteria, at the expense of detecting only 28 to 45% of all VTE cases. Conclusions Pregnancy-specific ICD-9-CM codes for VTE have low PPV. Other criteria must be applied to select cases with a high probability of having objectively documented VTE.
AB - Objective There is little data regarding the accuracy of pregnancy-specific ICD-9-CM codes used to identify patients with venous thromboembolism (VTE). Study design and setting We identified a large cohort of pregnant patients in whom there were one or more pregnancy-specific (600 codes) or standard ICD-9-CM codes (400 codes) for VTE. Charts of these cases were abstracted to determine the presence of objectively documented VTE. Results A total of 214 cases had a code for VTE either during pregnancy or the 6-week postpartum period; 82% had a pregnancy-specific code and 18% a standard code. Overall, 84 (39%, 95% CI=33-46%) had objectively documented VTE. A pregnancy-specific ICD-9-CM for VTE had a positive predictive value (PPV) of 54/174=31% (95% CI=24-38%), whereas standard VTE codes had a PPV of 30 of 38=80% (95% CI=63-99%). A PPV in the range of 95-100% could be attained using other criteria, at the expense of detecting only 28 to 45% of all VTE cases. Conclusions Pregnancy-specific ICD-9-CM codes for VTE have low PPV. Other criteria must be applied to select cases with a high probability of having objectively documented VTE.
KW - Administrative data
KW - Epidemiology
KW - Pregnancy
KW - Septic pelvic thrombophlebitis
KW - Thromboembolism
KW - Venous thrombosis
UR - http://www.scopus.com/inward/record.url?scp=7044224360&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=7044224360&partnerID=8YFLogxK
U2 - 10.1016/j.jclinepi.2004.02.003
DO - 10.1016/j.jclinepi.2004.02.003
M3 - Article
C2 - 15504642
AN - SCOPUS:7044224360
VL - 57
SP - 985
EP - 988
JO - Journal of Clinical Epidemiology
JF - Journal of Clinical Epidemiology
SN - 0895-4356
IS - 9
ER -