Table 1.
Demographic and baseline clinical characteristics of survey respondents
| Demographic and clinical characteristics | Totala N = 17,071 |
Monthly headache days categoryb | p valuesc | |
|---|---|---|---|---|
| 0–3 n = 11,498 |
≥ 4 n = 5573 |
|||
| Age, years, mean (SD) | 40.7 (13.0) | 40.3 (13.0) | 41.7 (12.9) | < 0.001d |
| Female | 11,354 (66.5) | 7325 (63.7) | 4029 (72.3) | < 0.001e |
| At least some college education | 11,891 (69.7) | 8119 (70.6) | 3772 (67.7) | < 0.001f |
| Employment status | < 0.001f | |||
| Employed full time | 9557 (56.0) | 6614 (57.5) | 2943 (52.8) | |
| Employed part time | 2826 (16.6) | 1848 (16.1) | 978 (17.6) | |
| Household income ≥ ¥5M | 8131 (47.6) | 5573 (48.5) | 2558 (45.9) | 0.0023f |
| Current smoking habit | 3783 (22.2) | 2435 (21.2) | 1348 (24.2) | < 0.001g |
| BMI (kg/m2), mean (SD) | 21.86 (3.87) | 21.85 (3.76) | 21.88 (4.08) | 0.7006d |
| Pain severity score (min–max: 0–10), mean (SD) | 5.1 (2.2) | 4.8 (2.2) | 5.8 (1.9) | < 0.001d |
| ASC-12, mean (SD) | 3.4 (3.6) | 3.2 (3.6) | 3.8 (3.8) | < 0.001d |
| ASC-12 category | < 0.001f | |||
| None (0–2) | 9011 (52.8) | 6362 (55.3) | 2649 (47.5) | |
| Mild (3–5) | 4288 (25.1) | 2787 (24.2) | 1501 (26.9) | |
| Moderate (6–8) | 2113 (12.4) | 1326 (11.5) | 787 (14.1) | |
| Severe (≥ 9) | 1659 (9.7) | 1023 (8.9) | 636 (11.4) | |
Data are n (%), unless otherwise indicated
ASC-12 Allodynia Symptom Checklist, BMI body mass index, M million, max maximum, min minimum, SD standard deviation
aData in the total column previously reported [3] are age, sex, employment status, and pain severity
bData in the 0–3 monthly headache days column previously reported [4] are age, sex, total employed, pain severity, and total current use of acute treatment. Data for ≥ 4 monthly headache days as a single category have not been previously reported
cPairwise comparisons between migraine headache days categories (0–3 vs. ≥ 4); note that the large sample size may result in statistically significant differences of minimal clinical importance
dt test (continuous variable)
eChi-square test, female versus male
fChi-square test across all categories (education categories: less than high school, high school graduate, college or technical school, university graduate, post-graduate qualification, not sure, or prefer not to answer; employment categories: employed full time, employed part time, homemaker, retired, student, disability payment, not employed and looking for work, not employed and not looking for work, or prefer not to answer; household income categories: < ¥1,000,000, ¥1,000,000–¥2,999,999, ¥3,000,000–¥7,999,999, ¥8,000,000–¥9,999,999, > ¥10,000,000, or prefer not to answer)
gChi-square test, current smoker versus current non-smoker