Patient-reported outcomes | Cohort | Total (N = 634) | p-value | |||
---|---|---|---|---|---|---|
Episodic migraine 0–3 HDM (n = 331) | Episodic migraine 4–7 HDM (n = 183) | Episodic migraine 8–14 HDM (n = 86) | Chronic migraine ≥15 HDM (n = 34) | |||
MIDAS total score, mean (SD) | 4.8 (12.6) | 11.0 (26.2) | 15.7 (18.3) | 21.3 (22.0) | 8.9 (19.4) | < 0.001a |
MIDAS disability category, n (%) |  |  |  |  |  | < 0.001b |
 Little/no disability | 191 (74.9) | 86 (57.7) | 29 (39.7) | 6 (30.0) | 312 (62.8) |  |
 Mild disability | 32 (12.5) | 25 (16.8) | 14 (19.2) | 2 (10.0) | 73 (14.7) |  |
 Moderate disability | 20 (7.8) | 17 (11.4) | 7 (9.6) | 5 (25.0) | 49 (9.9) |  |
 Severe disability | 12 (4.7) | 21 (14.1) | 23 (31.5) | 7 (35.0) | 63 (12.7) |  |
Derived Japanese EQ-5D utility score, mean (SD) | 0.89 (0.16) | 0.86 (0.18) | 0.82 (0.19) | 0.72 (0.23) | 0.86 (0.18) | < 0.001a |
EQ-5D overall VAS score, mean (SD) | 73.8 (17.9) | 72.5 (16.9) | 68.8 (18.4) | 60.8 (22.6) | 72.1 (18.2) | < 0.001a |
WPAI score, mean (SD) | ||||||
 % Work time missed | 4.5 (16.1) | 4.4 (13.3) | 2.8 (9.7) | 8.5 (18.6) | 4.4 (14.6) | 0.562a |
 % Impairment at work | 29.5 (25.5) | 35.8 (27.6) | 37.3 (29.4) | 42.2 (25.1) | 33.0 (26.9) | 0.051a |
 % Overall work impairment | 30.5 (26.7) | 37.0 (28.9) | 38.1 (29.4) | 44.7 (28.0) | 34.2 (28.0) | 0.058a |
 % Activity impairment | 32.4 (28.0) | 40.1 (28.0) | 46.1 (28.8) | 55.0 (28.0) | 37.7 (28.8) | < 0.001a |