A study to investigate the prevalence of headache disorders and migraine among people registered in a health insurance association in Japan

Table 7 Severity of impairment associated with medication use in migraine

	Migraine^a (N = 691)
	Not taking medicines		Taking medicines
	n	%	n	%
Severity of migraine^b
Severe	365	52.9	47	6.8
Moderate	316	45.7	69	10.0
Mild	10	1.4	510	73.8
Impairment in daily activities^c
Severe	204	29.5	31	4.5
Moderate	300	43.4	56	8.1
Mild	187	27.1	539	78.0

^a Migraine included individuals classified as probable migraine
^b Severity of migraine was grouped into 3 level from the patients’ response for evaluating the severity of a migraine attack in 5 levels: Severe: extreme or quite a bit of pain; Moderate: moderate pain; and Mild: little pain or no pain
^c Impairment in daily life was also grouped into 3 level from the patients’ response for evaluating the impairment in daily life when having a migraine in 5 levels: Severe: extreme difficulty or severe disruption in daily life; Moderate: moderate difficulty in daily life; and Mild: slightly interferes with daily life or no trouble at all

ISSN: 1129-2377