DC 8100 distinguishes the nature of migraine attacks, their average frequency and, at 50%, severe economic inadaptability.
The whole wording matters: very frequent attacks, completely prostrating and prolonged attacks, and severe economic inadaptability. The row does not publish a numerical attack-count shortcut for this tier.
With very frequent completely prostrating and prolonged attacks productive of severe economic inadaptability
This row combines characteristic prostrating attacks with an average of once a month over the last several months. Frequency alone omits the attack characteristic and observation period.
With characteristic prostrating attacks occurring on an average once a month over last several months
This row combines characteristic prostrating attacks with an average of one in two months over the last several months.
With characteristic prostrating attacks averaging one in 2 months over last several months
This row says less frequent attacks. It is still a published evaluation row, not a diagnosis or service-connection decision.
With less frequent attacks