Background: Type 2 diabetes mellitus is one of the most prevalent chronic diseases worldwide, currently affecting about 3 million global populations. The incidence of Type 2 diabetes has been increasing particularly in recently developed Asian settings including Hong Kong. Dairy product, as a part of dietary guidelines, has been hypothesized to help reduce risks of Type 2 diabetes. However different types of dairy product might have different effects on Type 2 diabetes given their varying content in fat, sugar and vitamins.
Objective: To review literature on the examination of the association between consumption of different types of dairy products (total dairy, high-fat dairy, low-fat dairy and fermented dairy) and the risk of type 2 diabetes
Methods Relevant studies were searched and identified through database of PubMed and Google Scholar using combination of keywords. Studies examining the association between consumption of total dairy and subtypes of dairy products and the risk of type 2 diabetes were included.
Results: Of the 163 papers identified, 10 studies were finally included in this systematic review. All studies were prospective cohort study from Western countries. Findings for different kinds of dairy products varied. For high-fat dairy products consumption, nine out of the ten studies found there was no association with type 2 diabetes risks. For low-fat dairy products, six out of ten studies found an inverse association after adjusted for confounders like age, sex and total energy intake; among these six studies, three still reported an inverse association after further adjusted for confounders like education level, smoking status and alcohol intake, physical activities and family history of type 2 diabetes. For fermented dairy products (mainly yoghurt), among seven studies which examined this, three studies found an inverse association between yogurt consumption and Type 2 diabetes risk before and after adjusted for multivariate confounders (age ,sex, total energy drink, education level, social class, physical activities, smoking status, alcohol intake and family history of type 2 diabetes, etc) . One of the three studies also found that, other than yogurt, there was an inverse association between low-fat fermented dairy and total fermented dairy consumption and type 2 diabetes risks after adjusted for age and sex. However, after further adjustment, the association became null for total fermented dairy products while it remained for low-fat fermented dairy products. All of the 10 studies that examined subtypes of dairy product also reported total dairy product consumption. For total dairy product, six out of ten studies found an inverse association.
Conclusion: Overall, total dairy consumption might be associated with lower risks of type 2 diabetes, but the associations may be varied by subtypes of dairy products. Across different types of dairy products, low-fat dairy consumption was associated with lower risk of type 2 diabetes while high-fat dairy consumption was clearly not associated with type 2 diabetes risk. Results for subtypes of fermented dairy consumption remain unclear. Further prospective cohort study in other non-Western populations may provide are required. / published_or_final_version / Public Health / Master / Master of Public Health
| Identifer | oai:union.ndltd.org:HKU/oai:hub.hku.hk:10722/206957 |
| Date | January 2014 |
| Creators | Qu, Zilin, 曲姿霖 |
| Publisher | The University of Hong Kong (Pokfulam, Hong Kong) |
| Source Sets | Hong Kong University Theses |
| Language | English |
| Detected Language | English |
| Type | PG_Thesis |
| Rights | Creative Commons: Attribution 3.0 Hong Kong License, The author retains all proprietary rights, (such as patent rights) and the right to use in future works. |
| Relation | HKU Theses Online (HKUTO) |
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