Underestimated problem?
Commenting on the findings, Kathleen Zackowski, PhD, associate vice president of research for the National Multiple Sclerosis Society in Baltimore, noted that participants were asked to rate their own sleep quality during adolescence, a subjective report that may mean sleep quality has an even larger association with MS risk.
“That they found a result with sleep quality says to me that there probably is a bigger problem, because I don’t know if people over- or underestimate their sleep quality,” said Dr. Zackowski, who was not involved with the research.
“If we could get to that sleep quality question a little more objectively, I bet that we’d find there’s a lot more to the story,” she said.
That’s a story the researchers would like to explore, Dr. Åkerstedt reported. Designing a prospective study that more closely tracks sleeping habits during adolescence and follows individuals through adulthood could provide valuable information about how sleep quality and duration affect immune system development and MS risk, he said.
Dr. Zackowski said clinicians know that MS is not caused just by a genetic abnormality and that other environmental lifestyle factors seem to play a part.
“If we find out that sleep is one of those lifestyle factors, this is very changeable,” she added.
The study was funded by the Swedish Research Council, the Swedish Research Council for Health, Working Life and Welfare, the Swedish Brain Foundation, AFA Insurance, the European Aviation Safety Authority, the Tercentenary Fund of the Bank of Sweden, the Margaretha af Ugglas Foundation, the Swedish Foundation for MS Research, and NEURO Sweden. Dr. Åkerstadt has been supported by Tercentenary Fund of Bank of Sweden, AFA Insurance, and the European Aviation Safety Authority. Dr. Zackowski reports no relevant financial relationships.
A version of this article first appeared on Medscape.com.