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Risk for colorectal adenocarcinoma in pernicious anemia. A population-based cohort study.
Ann Intern Med 1989; 111(9):738-42AIM

Abstract

STUDY OBJECTIVE

To determine the long-term risk for colorectal cancer among patients with pernicious anemia.

DESIGN

Historical cohort study.

SETTING

Population-based inception cohort of Rochester, Minnesota, residents.

PATIENTS AND METHODS

We identified 150 Rochester residents who had the onset of pernicious anemia during the 30-year period from 1950 through 1979, and we followed this cohort for 1664 person-years of observation. The observed risk for subsequent colorectal cancer in the cohort was compared with that expected based on incidence rates of colon and rectal cancer for the local population.

MEASUREMENTS AND MAIN RESULTS

There were 14 cases of colorectal cancer among the 150 patients with pernicious anemia (where 10.5 cases were expected), and 9 of these cases were found after the diagnosis of pernicious anemia was established (where 5.1 cases were expected). The relative risk for colon cancer at any time after the diagnosis of pernicious anemia was 1.8 (CI, 0.8 to 3.3). The relative risk was greatest (4.1; CI, 1.7 to 8.7) in the 5-year period immediately after the diagnosis of pernicious anemia; during this period, 7 cases of colon cancers were observed but only 1.7 were expected (P less than 0.0001).

CONCLUSION

Although the overall risk does not achieve statistical significance, patients with pernicious anemia may have an increased risk for colorectal adenocarcinoma in the 5 years after diagnosis.

Authors+Show Affiliations

Mayo Clinic, Rochester, Minnesota.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, P.H.S.

Language

eng

PubMed ID

2802432

Citation

Talley, N J., et al. "Risk for Colorectal Adenocarcinoma in Pernicious Anemia. a Population-based Cohort Study." Annals of Internal Medicine, vol. 111, no. 9, 1989, pp. 738-42.
Talley NJ, Chute CG, Larson DE, et al. Risk for colorectal adenocarcinoma in pernicious anemia. A population-based cohort study. Ann Intern Med. 1989;111(9):738-42.
Talley, N. J., Chute, C. G., Larson, D. E., Epstein, R., Lydick, E. G., & Melton, L. J. (1989). Risk for colorectal adenocarcinoma in pernicious anemia. A population-based cohort study. Annals of Internal Medicine, 111(9), pp. 738-42.
Talley NJ, et al. Risk for Colorectal Adenocarcinoma in Pernicious Anemia. a Population-based Cohort Study. Ann Intern Med. 1989 Nov 1;111(9):738-42. PubMed PMID: 2802432.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Risk for colorectal adenocarcinoma in pernicious anemia. A population-based cohort study. AU - Talley,N J, AU - Chute,C G, AU - Larson,D E, AU - Epstein,R, AU - Lydick,E G, AU - Melton,L J,3rd PY - 1989/11/1/pubmed PY - 1989/11/1/medline PY - 1989/11/1/entrez SP - 738 EP - 42 JF - Annals of internal medicine JO - Ann. Intern. Med. VL - 111 IS - 9 N2 - STUDY OBJECTIVE: To determine the long-term risk for colorectal cancer among patients with pernicious anemia. DESIGN: Historical cohort study. SETTING: Population-based inception cohort of Rochester, Minnesota, residents. PATIENTS AND METHODS: We identified 150 Rochester residents who had the onset of pernicious anemia during the 30-year period from 1950 through 1979, and we followed this cohort for 1664 person-years of observation. The observed risk for subsequent colorectal cancer in the cohort was compared with that expected based on incidence rates of colon and rectal cancer for the local population. MEASUREMENTS AND MAIN RESULTS: There were 14 cases of colorectal cancer among the 150 patients with pernicious anemia (where 10.5 cases were expected), and 9 of these cases were found after the diagnosis of pernicious anemia was established (where 5.1 cases were expected). The relative risk for colon cancer at any time after the diagnosis of pernicious anemia was 1.8 (CI, 0.8 to 3.3). The relative risk was greatest (4.1; CI, 1.7 to 8.7) in the 5-year period immediately after the diagnosis of pernicious anemia; during this period, 7 cases of colon cancers were observed but only 1.7 were expected (P less than 0.0001). CONCLUSION: Although the overall risk does not achieve statistical significance, patients with pernicious anemia may have an increased risk for colorectal adenocarcinoma in the 5 years after diagnosis. SN - 0003-4819 UR - https://www.unboundmedicine.com/medline/citation/2802432/Risk_for_colorectal_adenocarcinoma_in_pernicious_anemia__A_population_based_cohort_study_ L2 - https://www.annals.org/aim/fullarticle/doi/10.7326/0003-4819-111-9-738 DB - PRIME DP - Unbound Medicine ER -