“…Seventeen studies used the visual analogue scale (VAS) to assess the pain intensity of migraine [ 6 – 8 , 11 – 15 , 17 , 20 , 22 – 24 , 27 – 29 , 33 ]. Besides, the condition of migraine such as frequency of migraine attacks (8 studies) [ 6 – 8 , 11 , 13 , 16 , 20 , 29 ], migraine attack duration (7 studies) [ 20 , 22 – 24 , 28 , 30 , 31 ], migraine days (6 studies) [ 11 , 15 , 22 – 24 , 29 ], and migraine intensity (3 studies) [ 13 , 30 , 31 ] was also assessed. Two studies adopted the disease-specific scale, Migraine-Specific Quality of Life Questionnaire (MSQ), to evaluate the QoL of migraine [ 22 , 25 ] ( Figure1(c) ).…”