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. Author manuscript; available in PMC: 2020 Apr 1.
Published in final edited form as: Med Care. 2019 Apr;57(4):318–324. doi: 10.1097/MLR.0000000000001072

Figure 1. Sampling strategy and patients with adjudicated epilepsy diagnosis.

Figure 1.

Abbreviations: ICD-9 = International Classification of Diseases, Ninth Revision; IPW = inverse probability weighting.

Sampling strategy of eligible patients that resulted in a study sample of 1,534 patients, broken up into three sub-samples. ICD-9 claims related to epilepsy, the basis of stratification, were restricted to the time frame of 01/2012-12/2014.