Sample number Total population p-value Migraine Restless legs syndrome
N (%) N (%) N (% , 95 % CI) N (% , 95 % CI)
Gender
Men 1345 (49.3a) 16,357,919 (50.6) 0.42b 36 2.7, 1.8–3.5 56 4.1, 3.0–5.1
Women 1350 (50.7a) 15,998,828 (49.4) 107 7.9, 6.5–9.4 86 6.4, 5.1–7.7
Age
19–29 542 (20.5a) 7,179,648 (22.2) 0.76b 25 4.5, 2.8–6.2 12 2.2, 1.0–3.4
30–39 604 (21.9a) 7,767,141 (24.0) 42 7.0, 5.0–9.1 34 5.6, 3.7–7.4
40–49 611 (23.1a) 8,012,377 (24.8) 39 6.5, 4.5–8.4 20 3.3, 1.9–4.7
50–59 529 (18.9a) 5,737,344 (17.7) 22 4.1, 2.4–5.9 35 6.5, 4.4–8.7
60–69 409 (15.6a) 3,660,237 (11.3) 15 3.9, 2.0–5.7 41 10.2, 7.3–13.1
Size of residential area
Large city 1,248 (46.3a) 1,5606,652 (48.2) 0.92b 76 6.1, 4.8–7.5 66 5.3, 4.1–6.5
Medium-to-small city 1,186 (44.0a) 1,4106,687 (43.6) 48 4.0, 2.9–5.1 58 4.9, 3.7–6.1
Rural area 261 (9.7a) 264,307 (8.2) 19 7.4, 4.2–10.6 18 6.8, 3.7–9.8
Educational level
Middle school or less 393 (14.9a) 6,147,782 (19.0) 0.75b 22 5.5, 3.3–7.7 41 10.5, 7.5–13.5
High school 1,208 (44.5a) 14,172,255 (43.8) 60 5.0, 3.8–6.3 62 5.1, 3.8–6.3
College or more 1,068 (39.6a) 1,2036,710 (37.2) 60 5.6, 4.3–7.0 38 3.6, 2.5–4.7
Total 2,695 (100.0a) 32,356,747 (100.0) 143 5.3, 4.5–6.2 142 5.3, 4.4–6.1