[Danish] Study finds no evidence aluminum salts in vaccines are tied to higher risk of asthma, other childhood diseases

[yoshy]

I added "Danish" in this post's title just to add a little more specific info. I figured this study was notable enough to warrant a post.

Study finds no evidence aluminum salts in vaccines are tied to higher risk of asthma, other childhood diseases

Aluminum increases some shots' effectiveness and should be seen as safe, researchers say

Study finds no evidence aluminum salts in vaccines are tied to higher risk of asthma, other childhood diseases

Aluminum used as a preservative in vaccines has been a frequent target of vaccine conspiracy theories. This study "of more than 1.2 million children over a 24-year period" has both a huge sample size and a long period of observation. (Note that thiomersal, a previously common preservative and another frequent target, is a mercury compound, so is not related to this study.)

Study linked here.

Measurements:
Incident events of 50 chronic disorders, including autoimmune (dermatologic, endocrinologic, hematologic, gastrointestinal, and rheumatic), atopic or allergic (asthma, atopic dermatitis, rhinoconjunctivitis, and allergy), and neurodevelopmental (autism spectrum disorder and attention deficit–hyperactivity disorder).

Results:
Cumulative aluminum exposure from vaccination during the first 2 years of life was not associated with increased rates of any of the 50 disorders assessed. For groups of combined outcomes, adjusted hazard ratios per 1-mg increase in aluminum exposure were 0.98 (95% CI, 0.94 to 1.02) for any autoimmune disorder, 0.99 (CI, 0.98 to 1.01) for any atopic or allergic disorder, and 0.93 (CI, 0.90 to 0.97) for any neurodevelopmental disorder. For most individually analyzed outcomes, the upper bounds of the 95% CIs were incompatible with relative increases greater than 10% or 30%.

(The hazard ratio of "0.93 (CI, 0.90 to 0.97) for any neurodevelopmental disorder." actually shows evidence of a lower rate of incidence of neurodevelopmental disorders for vaccinated people, but I wouldn't conclude that it necessarily does lower the rate. It would be interesting to see the same measurement and grouping of disorders in other studies.)