Een associatie (in dit geval tussen eieren en diabetes) suggereert correlatie en geen causaliteit. Het blijft dus de vraag of mensen met diabetes veel eieren eten, of dat het eten van eieren diabetes veroorzaakt. Studie betreft een survey, een verkenning dus. De resultaten van zo'n verkenning zijn dus wetenschappelijk gezien ook niet zo interessant. Teveel externe factoren die niet uitgesloten zijn (zoals wel bij een gerandomiseerd experiment met een controle groep).
Als ik even een snelle Pubmed search doe naar dit onderwerp, en dan alleen filter op RCT's en meta analyses kom ik hier op uit:
The guidelines for dietary cholesterol and/or egg intake for both the general population and those at higher risk of cardiovascular disease (for example, people with type 2 diabetes mellitus (T2DM)) differ between countries, and even for different specialist societies in a country. The disparity...
pubmed.ncbi.nlm.nih.gov
Abstract
The guidelines for dietary cholesterol and/or egg intake for both the general population and those at higher risk of cardiovascular disease (for example, people with type 2 diabetes mellitus (T2DM)) differ between countries, and even for different specialist societies in a country. The disparity between these guidelines is at least in part related to the conflicting evidence as to the effects of eggs in the general population and in those with T2DM. This review addresses the effect of eggs on cardiovascular disease (CVD) risk from both epidemiological research and controlled prospective studies, in people with and without cardio-metabolic disease. It also examines the nutritional qualities of eggs and whether they may offer protection against chronic disease.
The evidence suggests that a diet including more eggs than is recommended (at least in some countries) may be used safely as part of a healthy diet in both the general population and for those at high risk of cardiovascular disease, those with established coronary heart disease, and those with T2DM. In conclusion, an approach focused on a person's entire dietary intake as opposed to specific foods or nutrients should be the heart of population nutrition guidelines.
Keywords: cardiovascular disease; dietary cholesterol; eggs; type 2 diabetes mellitus.