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Table 1 Headache types and transformation of headaches throughout the study (n = 87)

From: Course of adolescent headache: 4-year annual face-to-face follow-up study

  1. TTH tension type headache
  2. p = 0.002; ** p = 0.001; *** p = 0.002;  p < 0.001. All others not significant. All compared to previous year