Journal of Gastrointestinal Surgery

, Volume 14, Issue 2, pp 303–308 | Cite as

The Diagnosis of Diverticulitis in Outpatients: On What Evidence?

  • Erin S. O’Connor
  • Glen Leverson
  • Gregory Kennedy
  • Charles P. Heise
Original Article

Abstract

Purpose

Diverticular disease is common in the outpatient setting; yet, rigorous study of diagnosis and management strategies is currently limited to hospitalized patients. Here, we characterize the clinical assessment generating the diagnostic label of diverticulitis in outpatients.

Methods

Encounters for diverticulitis were identified using ICD-9 diagnosis codes (562.11/562.13) from the electronic medical record system of a tertiary referral hospital and its regional clinics. The frequencies of various demographic and clinical variables were compared between patients presenting in the emergency room (ER) or outpatient Clinic.

Results

Between 2003 and 2008, 820 inpatients and 2,576 outpatients met inclusion criteria (328 [13%] ER, 2,248 [87%] Clinic). Compared to ER patients, Clinic patients were less likely to undergo urgent abdominal/pelvic computed tomography (CT) scan (14% vs. 85%, p < .0001) or have an abnormal WBC count (35% vs. 69%, p < .0001). Twenty-four-hour events, including inpatient admission (30% ER vs. 3.5% Clinic, p < .0001) and colectomy (1.2% ER vs. 0.4% Clinic, p = 0.08) were rare in both groups.

Conclusion

Diverticulitis in the outpatient setting is often characterized by infrequent use of CT scans, lack of leukocytosis, and rare need for urgent surgery or early admission. As this diagnostic label appears to be commonly applied without objective evidence, further study is needed to evaluate its validity.

Keywords

Diverticulitis Outpatient Diagnostic strategy Diverticulosis 

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Copyright information

© The Society for Surgery of the Alimentary Tract 2009

Authors and Affiliations

  • Erin S. O’Connor
    • 1
  • Glen Leverson
    • 1
  • Gregory Kennedy
    • 1
  • Charles P. Heise
    • 1
    • 2
  1. 1.Department of SurgeryUniversity of Wisconsin School of Medicine and Public HealthMadisonUSA
  2. 2.H4/746 Clinical Science CenterMadisonUSA

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