Identifying menstrual migraine– improving the diagnostic criteria using a statistical method

Table 1 Descriptive statistics for the migraine diaries in the data set

	Median^*	(IQR)^*	Mean^*
Diary-days observed	103	(83.0—151.5)	129.1
Migraine locked days per 30 days	0.1	(0.0—0.4)	0.3
Age (of the patients in years)	42.0	(35.8—47.0)	41.0
Migraine days	14.0	(10.5—22.0)	18.1
Migraine attacks	7.0	(5.0—10.0)	9.0
Migraine days per 30 days	3.8	(3.1—5.2)	4.3
Migraine attack duration (days) ^†,‡	1.0	(1.0—2.0)	1.8
Number of menstrual cycles	4.0	(3.0—5.0)	4.5
Cycle lengths (days) ^‡	28.0	(25.8—30.0)	28.8

^*The statistics reported (e.g. the means) are taken over the individual patient-headache diaries
^†I.e. the number of consecutive days of migraine – see also Fig. 3
^‡The figures reported are the median of the individual medians, and the mean of the individual means

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