Table 2 Crosstab of perimenstrual headache
From: The role of purity and frequency in the classification of perimenstrual headache
N (%) | ||||
|---|---|---|---|---|
Migraine | TTH | Other types | Total | |
High-frequency | ||||
Impure | 17 (6.7) | 13 (5.1) | 26 (10.2) | 56 (22.0) |
Pure | 14 (5.5) | 12 (4.7) | 17 (6.7) | 43 (16.9) |
Low-frequency | ||||
Impure | 18 (7.1) | 27 (10.6) | 46 (18.1) | 91 (35.8) |
Pure | 13 (5.1) | 15 (5.9) | 36 (14.2) | 64 (25.2) |
Total | 62 (24.4) | 67 (26.4) | 125 (49.2) | 254 (100.0) |