Table 1 Patient strata for the selection of a stratified random sample of patients, Migraine Signature Survey
Strata description for sampling groups | 5-year and 2-year MPA scores | EHR headache diagnosis | 1 + migraine encounter with a neurologist | Size of source sample | Number sent a survey | Response percent (n) | Sampling weights1 | ||
|---|---|---|---|---|---|---|---|---|---|
MPA5Y > 10 | MPA2Y > 10 | Headache NOS | Migraine | ||||||
A: Recent migraine care from neurology | Yes | Yes | Yes | Yes | 14,139 (1.45%) | 2368 | 17.6% (404) | 35.0 | |
B: Recent migraine care from primary care | No | 36,722 (3.78%) | 2434 | 14.1% (341) | 107.7 | ||||
C: Past but no recent care for migraine | Yes | No | 23,645 (2.43%) | 5333 | 10.8% (575) | 41.1 | |||
D: Headache care, NOS | No | Yes | No | No | 69,704 (7.17%) | 7737 | 5.2% (399) | 174.7 | |
E: No care for headache | No | No | No | 828,325 (85.17%) | 10,396 | 5.6% (586) | 1413.5 | ||
Total | 972,535 (100%) | 28,268 | 8.2% (2305) | ||||||