On the Association between Gastrointestinal Symptoms and Extragastric Manifestations

Figure 4

Reduction of headache symptoms from the first visit to the second (two weeks after) and third visits (one month after the 1st visit). (a) Headache frequency. (b) Headache intensity. (c) Headache duration. The asterisk () indicates a statistically significant relationship between the marked groups.

(a)

(b)

(c)