In a 2011 large-scale examine revealed in Laterality, researchers analyzed greater than 1 million members to find out whether or not or not a hyperlink existed between left-handedness and three particular well being circumstances: allergy symptoms, ulcers, and arthritis. No relationship was noticed between left-handedness and allergy symptoms. When it got here to ulcers and arthritis, nevertheless, a connection was seen between left-handedness and decrease charges of each circumstances. As a result of genetics is believed to play a job in hand dominance, the examine staff theorized that these identical genes could probably be concerned within the relationship between left-handedness and diminished charges of ulcers and arthritis.
One other idea was explored within the beforehand talked about 2016 examine revealed in Scientific Stories, by which higher joint involvement was seen in right-hand dominant rheumatoid arthritis sufferers in comparison with joints on their non-dominant facet (on this case, the left). Extra important joint destruction on account of erosion was additionally seen on the members’ dominant facet, indicating that the elevated involvement of those joints could also be partially accountable. Though this identical relationship existed between left-hand dominant RA sufferers and higher joint involvement, it was not deemed statistically important. As a result of the examine had numerous limitations, nevertheless, no definitive conclusions might be drawn. Solely 4% of topics included within the analysis had been left-handed. Due to this fact, future research with a bigger pattern dimension are nonetheless wanted.