Table 3.

Frequency and duration of persistent symptoms/true postdromes.

		PTS (n, %)	TPD (n, %)
DURATION OF PERSISTENT SYMPTOMS/TRUE POSTDROMES
1	<3 h	100 (34.4%)	185 (72.0%)
2	3 to < 6 h	55 (18.9%)	28 (10.9%)
3	6 to < 12 h	52 (17.9%)	28 (10.9%)
4	12 to < 24 h	83 (28.5%)	11 (4.3%)
5	≥24 h	1 (0.3%)	5 (1.9%)
		291 (100%)	257 (100%)
FREQUENCY OF PERSISTENT SYMPTOMS/POSTDROMES AS A FUNCTION OF MIGRAINE ATTACKS
1	Always	2 (0.7%)	2 (0.8%)
2	Very often	19 (6.5%)	52 (20.2%)
3	Often	128 (44.0%)	125 (48.6%)
4	Rarely	142 (48.8%)	78 (30.4%)
		291 (100%)	257 (100%)

PTS, Persistent symptoms.

TPD, True postdromal symptoms.