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Table 1 The probability of experiencing a headache attack during menstruation and similarity to non-menstrual headaches

From: Impact of sex hormonal changes on tension-type headache and migraine: a cross-sectional population-based survey in 2,600 women

Headache type Most of the time n (%) Sometimes n (%) Never n (%) Different n (%) Similar n (%)
Definite migraine 252 (54.3 %) 90 (19.4 %) 122 (26.3 %) 158 (46.2 %) 184 (53.8 %)
Probable migraine 94 (36.4 %) 62 (24.0 %) 102 (39.5 %) 70 (44.9 %) 86 (55.1 %)
Total migraine 346 (47.9 %)* 152 (21.1 %) 224 (31.0 %) 228 (45.8 %)** 270 (54.2 %)
Definite TTH 23 (27.7 %) 29 (34.9 %) 31 (37.3 %) 11 (21.2 %) 41 (78.8 %)
Probable TTH 28 (18.7 %) 50 (33.3 %) 72 (48.0 %) 22 (28.2 %) 56 (71.8 %)
Total TTH 51 (21.9 %) 79 (33.9 %) 103 (44.2 %) 33 (25.4 %) 97 (74.6 %)
  1. The comparisons were made between most of the time + sometimes against never (Pearson Chi-square, Yates’ continuity correction and Fisher’s exact tests were used where appropriate)
  2. The menstrual period was defined as 3 days prior to and 5 days after the beginning of menstruation
  3. Similarity of the menstrual headache was compared to the usual headaches outside the menstruation period as shown in the last two columns (%)
  4. * p < 0.001; compared to total TTH
  5. ** p < 0.001; compared to total TTH