Elsevier

Pancreatology

Volume 16, Issue 6, November–December 2016, Pages 988-994
Pancreatology

Original Article
Deficiency of fat-soluble vitamins in chronic pancreatitis: A systematic review and meta-analysis

https://doi.org/10.1016/j.pan.2016.09.008Get rights and content

Abstract

Background and aims

Chronic pancreatitis (CP) patients are at risk for fat-soluble vitamins (A, D, E, K) deficiency, but available studies are small and heterogeneous. We conducted a systematic review and meta-analysis to determine the prevalence of fat–soluble vitamins deficiency in CP patients.

Methods

Medline was searched up to January 2016 for case series and case-control studies reporting prevalence of fat-soluble vitamin deficiency in CP patients. The prevalent deficiency rate was pooled for included studies, and deficiency rate between CP and controls, with relative odds ratio (OR) and 95% confidence interval (CI) calculated for case-control studies.

Results

Twelve studies including 548 patients included. With a random-effect model, the pooled prevalence rate of vitamin A, D and E deficiency were 16.8% (95%CI 6.9–35.7), 57.6% (95%CI 43.9–70.4) and 29.2% (95%CI 8.6–64.5) respectively, with considerable heterogeneity (I2 = 75%, 87.1% and 92%). Only one study evaluated vitamin K deficiency. The pooled OR for vitamin D deficiency in CP cases compared with controls was 1.17 (95% CI 0.77–1.78). Sensitivity analyses showed lower prevalence of vitamin A and E, and higher prevalence of vitamin D deficiency in high-quality studies. The rate of pancreatic exocrine insufficiency did not seem affect the deficiency rates, while the use of different cut-offs influences results and heterogeneity for vitamin E, but not A.

Conclusions

Fat-soluble vitamins deficiency is frequent in CP patients, with considerable heterogeneity. There is, however, no apparent increased risk of vitamin D deficiency in CP compared to controls. Larger, high-quality studies are necessary to better estimate the prevalence of fat-soluble vitamins deficiency, including vitamin K.

Section snippets

Background

Chronic pancreatitis (CP) is the most important and common etiology of pancreatic exocrine insufficiency (PEI), causing steatorrhea, meteorism, abdominal pain and malnutrition. During the course of the disease, pancreatic enzyme production decreases, resulting in maldigestion and leading to deficiencies of macro- and micronutrients. Pain, diabetes and alcoholism can also interfere with proper nutrition in patients with CP [1], [2]. Several nutritional deficiencies have been demonstrated in

Search strategy and study selection

A computerized literature search of MEDLINE and of the Cochrane database did not identify any prior systematic review on CP and fat-soluble vitamin deficiencies. In our search for original studies, we performed a MEDLINE search (until January 2016). Specific search terms were: (Vitamin A OR 11-cis-Retinol OR 3,7-dimethyl-9-(2,6,6-trimethyl-1-cyclohexen-1-yl)-2,4,6,8-nonatetraen-1-ol, (all-E)-Isomer OR All-Trans-Retinol OR Aquasol A OR Retinol OR vitamin A1 OR vitamin D OR cholecalciferol OR

Results

Three-hundred-eighty-one potential studies where identified throughout an initial search, of which 357 were excluded, as they were not related to the study topic or did not fulfill the inclusion criteria. Twenty-four studies met the inclusion criteria and were considered for the analysis, of which 12 were excluded, because these did not report the prevalence of deficiency of the vitamins of interest. Finally, 12 studies remained for qualitative analysis and quantitative synthesis (Fig. 1).

Discussion

Previous studies have reported that patients suffering from CP are at risk of developing fat-soluble vitamins deficiency. However, available studies are often heterogeneous and conducted on relatively small series of patients. This is the first systematic review and meta-analysis on this topic, highlighting the pooled prevalence of fat-soluble vitamin deficiencies in CP patients.

Twelve articles were reviewed, and in spite of a considerable heterogeneity for all analyses, the prevalence rate of

Conflicts of interest

The authors disclose no conflicts.

Authors contribution

G.C. and P.S. contributed with study concept and design, analysis and interpretation of data, statistical analysis, and drafting of the manuscript; E.M., S.S., A.H., A.K., M.M. and A.W. contributed with acquisition of data, analysis and interpretation of data, drafting of the manuscript; P.M with analysis and interpretation of data; all authors performed critical revision of the manuscript for important intellectual content.

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    The paper is part of the P-BONE study group project, supported by the Pancreas 2000 educational project.

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