Cranial Electrotherapy Stimulation in the Treatment of Migraine Headaches

Mean change in headache days between 28 day run-in month and 28 day blinded month, i.e. run-in month mean minus blinded month mean. A good response is >= 50% reduction in headache days (congruent with the Guidelines for Trial of Behavioral Treatments for Recurrent Headache).

Mean difference of PHQ-9 score between the run-in month and blinded month, i.e. PHQ-9 score from run-in month minus blinded month. The PHQ-9 is a tool for assisting in diagnosing depression (over the prior 2 week period) as well as selecting and monitoring treatment. There are nine items, with responses each ranging from 0 (not at all) to 3 (nearly every day), for a total range of 0 to 27. The higher the total the more severe the depressive symptoms.

Mean change in headache days between 28 day run-in month and 28 day open label month, i.e. run-in month mean minus open label month mean. A good response is >= 50% reduction in headache days (congruent with the Guidelines for Trial of Behavioral Treatments for Recurrent Headache).

Mean difference of PHQ-9 score between the run-in month and open label month, i.e. PHQ-9 score from run-in month minus open label month. The PHQ-9 is a tool for assisting in diagnosing depression (over the prior 2 week period) as well as selecting and monitoring treatment. There are nine items, with responses each ranging from 0 (not at all) to 3 (nearly every day), for a total range of 0 to 27. The higher the total the more severe the depressive symptoms.

Mean difference in HIT-6 score between run-in month and blinded month. The HIT-6 is a tool for screening and monitoring change in headache disability. This disease-specific health survey is intended for adults 18 years of age and older, and is available with a standard four-week recall period. It is a 6 item questionnaire with scores for each item ranging from 6 (never) to 13 (always). The minimum overall score is 36 and the maximum is 78. Higher scores represent greater disability.

Mean difference in HIT-6 score between run-in month and open label month. The HIT-6 is a tool for screening and monitoring change in headache disability. This disease-specific health survey is intended for adults 18 years of age and older, and is available with a standard four-week recall period. It is a 6 item questionnaire with scores for each item ranging from 6 (never) to 13 (always). The minimum overall score is 36 and the maximum is 78. Higher scores represent greater disability.

Mean difference in GAD 7 score between run-in month and blinded month. This is a screening tool and severity measure for generalized anxiety disorder addressing symptoms over the prior 2 weeks. It is a 7 item questionnaire with response scores for each item ranging from 0 (not at all) to 3 (every day). The range for the total score is 0 to 21, with higher scores representing greater symptoms of anxiety

Mean difference in GAD 7 score between run-in month and open label month. This is a screening tool and severity measure for generalized anxiety disorder addressing symptoms over the prior 2 weeks. It is a 7 item questionnaire with response scores for each item ranging from 0 (not at all) to 3 (every day). The range for the total score is 0 to 21, with higher scores representing greater symptoms of anxiety

Mean difference in PHQ 15 score between run-in month and blinded month. The PHQ-15 comprises 15 somatic symptoms experienced over the prior 4 weeks and their severity, each symptom scored from 0 ("not bothered at all") to 2 ("bothered a lot"). The range for the overall score is between 0 and 30, with higher score representing more severe somatic symptoms

Mean difference in PHQ 15 score between run-in month and open label month. The PHQ-15 comprises 15 somatic symptoms experienced over the prior 4 weeks and their severity, each symptom scored from 0 ("not bothered at all") to 2 ("bothered a lot"). The range for the overall score is between 0 and 30, with higher score representing more severe somatic symptoms.

Mean difference of Epworth Sleepiness Scale score between run-in month and blinded month. The Epworth Sleepiness Scale is used to measure excessive daytime sleepiness. This is an 8 item questionnaire, recalling probability of falling asleep in "recent times". The subjects are asked to rate probability of falling asleep in eight different situations. The score for each item ranges from 0 (would never doze) to 3 (high chance of dozing), with the overall score range of 0 to 24. Higher scores represent higher probability of falling asleep.

Mean difference of Epworth Sleepiness Scale score between run-in month and open label month. The Epworth Sleepiness Scale is used to measure excessive daytime sleepiness. This is an 8 item questionnaire, recalling probability of falling asleep in "recent times". The subjects are asked to rate probability of falling asleep in eight different situations. The score for each item ranges from 0 (would never doze) to 3 (high chance of dozing), with the overall score range of 0 to 24. Higher scores represent higher probability of falling asleep.