There have been a couple of studies on cognitive function and thalassemia minor. One was puiblished just this month and I attached the abstract below. Don't get too caught up on the IQ game. Iron deficiency can also 'lower IQ' was revealed by another study I am too lazy too look for right now, but 10-15 here or aren't that important and these tests vary if you retake them. IQ tests matter to differentiate between the Forrest Gumps and the Einsteins, but the rest of the curve is pretty huge and variable and we shouldn't compete or place value on a few points here and there.
Mostly the studies find a slower cognitive response, but anybody who is tired from thal minor would be slow. It doesn't mean we are less smart -- you just have more days that you are foggy and we can really suck at timed tests. I know I really do and it makes me mad because all the US tests I had to take for college were timed and I was quite bad at them. Speed is good for some professions, but deep slow thought is better for others ;)
Besides, dont underestimate the value of emotional intelligence which is only now gaining momentum. Not all people are meant to be rocket scientists. The world would be pretty boring. We also need artists, politicians, historians, etc. My grandfather who is a lawyer and speaks five of the hardest western languages fluently couldn't change a light bulb or boil an egg and I am sure he scored really high on his IQ tests...;)
************
Am J Hematol. 2007 Mar;82(3):203-7.
Cognitive dysfunction in beta-thalassemia minor.
* Nevruz O,
* Ulas U,
* Cetin T,
* Kutukcu Y,
* Kurekci A.
Department of Hematology, Gulhane Medical School, Ankara, Turkey.
beta-thalassemia minor is a common, hereditary, and mostly symptomless disease. Previous studies have shown that lower hemoglobin values are associated with poorer cognitive functions. We aimed to evaluate the cognitive function in patients with beta-thalassemia minor. Thirty-two male subjects with beta-thalassemia minor and 32 sex-, age-, and education status-matched healthy subjects were enrolled in the study. Blood tests and P300 potentials were carried out. P300 potential latency in all patients was significantly longer than those in the control group (337.63 +/- 34.89 msec and 310.66 +/- 14.30 msec, respectively; t 4.046, P < 0.001). The amplitudes of P300 in patient group were significantly lower than those in the control group (5.19 +/- 3.59 muV and 9.81 +/- 3.33 muV, respectively; t 5.349, P < 0.001). In this study, we have found that P300 potentials are adversely affected for cognitive functions in patients with beta-thalassemia minor. Am. J. Hematol., 2007. (c) 2006 Wiley-Liss, Inc.
PMID: 17078021 [PubMed - in process]