{'fraction_non_alphanumeric': 0.008908685968819599, 'fraction_numerical': 0.0, 'mean_word_length': 5.521739130434782, '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}}
Persistent or severe back pain and stiffness are ominous symptoms requiring prompt attention

Background: Children with severe or persistent back pain and stiffness often have an underlying organic cause but there is a large differential diagnosis, examination may be difficult and the problem is relatively rare in general paediatric practice. These difficulties appeared to lead to delays in diagnosis and management of children with this problem.