Migraine was defined using ICHD-II criteria [30] while Medication Overuse was defined using the ICHD-IIR criteria [31].
Medication-overuse headache (MOH) was defined as a headache occurring on 15 or more days per month developing as a consequence of regular overuse of acute or symptomatic headache medication for more than 3 months [1].
A musculoskeletal disorder (MSD) (including overuse and acute injuries) was defined as an event that resulted in physical damage to the body for which the conscript sought medical care from the garrison clinic.
A musculoskeletal disorder (including overuse and acute injuries) was defined as an event that resulted in physical damage to the body and for which the conscript sought medical care from the garrison clinic.
Each territory was defined as a "khanate".
MAIN OUTCOME MEASURE(S): Time-loss medical-attention overuse injuries were defined as injuries with an overuse mechanism of injury in the NCAA ISS or medical records.
At baseline, patients were defined as overusing acute headache medication if they were taking acute headache medication ≥2 times a week in any week with diary data on ≥5 days for the 4-week screening period.
Due to frequent pain-relieving medication intake, migraineurs are predisposed to develop medication-overuse headache (MOH) [2 5], which is defined as a chronic headache disorder developed as a consequence of regular overuse of acute or symptomatic headache medication [6].
Overuse injuries, or cumulative trauma disorders, may be defined as tissue damage that is a result of repetitive demand over the course of time [1].
Age, gender, years of pain suffering, history of migration, history of headache, history of accident (subsequently refered to as "accident"), depression and anxiety were defined as possible associated factors for analgesic overuse.
