Higher serum uric acid levels and advanced age are associated with an increased prevalence of colorectal polyps

Tomizawa,Minoru; Shinozaki,Fuminobu; Hasegawa,Rumiko; Shirai,Yoshinori; Motoyoshi,Yasufumi; Sugiyama,Takao; Yamamoto,Shigenori; Ishige,Naoki

doi:10.3892/br.2015.487

Higher serum uric acid levels and advanced age are associated with an increased prevalence of colorectal polyps

Authors:
- Minoru Tomizawa
- Fuminobu Shinozaki
- Rumiko Hasegawa
- Yoshinori Shirai
- Yasufumi Motoyoshi
- Takao Sugiyama
- Shigenori Yamamoto
- Naoki Ishige
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Affiliations: Department of Gastroenterology, National Hospital Organization, Shimoshizu Hospital, Yotsukaido, Chiba 284‑0003, Japan, Department of Radiology, National Hospital Organization, Shimoshizu Hospital, Yotsukaido, Chiba 284‑0003, Japan, Department of Surgery, National Hospital Organization, Shimoshizu Hospital, Yotsukaido, Chiba 284‑0003, Japan, Department of Neurology, National Hospital Organization, Shimoshizu Hospital, Yotsukaido, Chiba 284‑0003, Japan, Department of Rheumatology, National Hospital Organization, Shimoshizu Hospital, Yotsukaido, Chiba 284‑0003, Japan, Department of Pediatrics, National Hospital Organization, Shimoshizu Hospital, Yotsukaido, Chiba 284‑0003, Japan, Department of Neurosurgery, National Hospital Organization, Shimoshizu Hospital, Yotsukaido, Chiba 284‑0003, Japan
Published online on: July 10, 2015 https://doi.org/10.3892/br.2015.487
Pages: 637-640

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Abstract

The present study retrospectively analyzed the laboratory data of patients who had undergone a colonoscopy between April 2011 and March 2014, with the aim of assessing whether these variables could be used to predict the presence of colorectal polyps (CP). A total of 1,471 patients were enrolled (731 men, 68.5±10.8 years; 740 women, 66.7±10.8 years). One‑way analysis of variance was performed to analyze the association between the presence of CP and a range of laboratory variables. Logistic regression analysis was performed to establish a regression equation to predict the presence of CP. Receiver‑operator characteristics analysis was applied to investigate the performance of the regression equation. Patients with CP were older than those without CP (P<0.0001). Serum uric acid (UA) levels were higher in patients with CP, compared to those without CP (P=0.0007). To investigate the possibility that older age and higher UA levels could predict the presence of CP, logistic regression analysis was performed (P=0.0008). The regression equation was as follows: ln(p/1 - p) = 2.79015 ‑ 0.01836 x age ‑ 0.28542 x UA (mg/dl), where p indicates the presence of CP. Receiver‑operator characteristic analysis showed the area under the curve to be 0.62092 and the threshold value of P was 0.4370. Sensitivity and specificity of the threshold value were 77.6 and 44.2%, respectively. Advanced age and higher serum UA levels were associated with the presence of CP. In conclusion, logistic regression analysis obtained a regression equation that predicted the presence of CP with a higher sensitivity, but poorer specificity, compared to fecal occult blood testing.

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