Non-steroidal Anti-inflammatory Drugs Alone or With a Triptan and Reports of Transition From Episodic to Chronic Migraine

Inclusion Criteria

• •Respondents age 18 or older at the time of survey completion
• •Respondents completed the questionnaires in 2004 and at least one other year (2005, 2006, 2007, 2008, 2009)
• •Based on the respondents answers to the 2004 survey, their symptoms meet the criteria for EM which is characterized by headaches meeting International Classification of Headache Disorders - 2 (ICHD-2) criteria for migraine 1-14 days a month