{'fraction_non_alphanumeric': 0.04460093896713615, 'fraction_numerical': 0.035211267605633804, 'mean_word_length': 4.405063291139241, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Comment: Sex-specific differences in cluster headache—

Cluster headache (CH) has long been regarded as a males-only disorder. However, the male to female ratio (M/F) of up to 6.2:1 in patients with CH onset before 1960 has fallen to 2.1:1 for patients with onset in the 1990s—similar to that found by Lund et al.1 Lifestyle changes may have contributed to this phenomenon, or an increased awareness of the condition in women.