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World J Emerg Surg. 2012 Oct 2;7(1):32. doi: 10.1186/1749-7922-7-32.

Clinical value of total white blood cells and neutrophil counts in patients with suspected appendicitis: retrospective study.

Author information

  • 1Department of Surgery, King Abdulaziz University, P,O, Box 80215, Jeddah, 21589, Saudi Arabia. zkngaithy@hotmail.com.

Abstract

INTRODUCTION:

Acute appendicitis (AA) is common surgical problem associated with acute-phase reaction. Blood tests role in decision-making process is unclear. This retrospective study aimed to determine diagnostic value of preoperative evaluation of white blood cells (WBCs) and neutrophils and its value in predicting AA severity.

METHODS:

Medical records of 456 patients who underwent appendectomy during 4-years period were retrospectively reviewed. Patients were subdivided according to histological finding into: normal appendix (n = 29), uncomplicated inflamed appendix (n = 350), complicated appendicitis (n = 77). Diagnostic performances of WBCs and neutrophils were analyzed using receiver operating characteristic (ROC) curves.

RESULTS:

WBCs and neutrophils counts were higher in patients with inflamed and complicated appendix than normal appendix and in complicated than inflamed appendix. In patients, WBCs count 9.400 × 103/mL had sensitivity of 76.81%, specificity of 65.52%, positive predictive value (PPV) of 97.0%, negative predictive value (NPV) of 16.1%, positive likelihood ratio [LR(+)] of 2.23, negative LR(-) of 0.35. Neutrophil count 7.540 × 103/mL had sensitivity of 70.96%, specificity of 65.52%, PPV of 96.8%, NPV of 13.3%, LR(+) of 2.06, LR(-) of 0.44. Areas under ROC curve were 0.701, 0.680 for elevated WBCs and neutrophils count.

CONCLUSIONS:

Clinicians should not rely on either elevated WBCs or neutrophils count as appendicitis indicator as clinical data are superior in decision-making appendectomy.

PMID:
23031349
PMCID:
PMC3502286
DOI:
10.1186/1749-7922-7-32
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