Globally,<unk>  prevalence is estimated to be approximately 10%. A table depicting the<unk>  prevalence of chronic pain patients of different age groups according to a study in Japan. Researchers have tried to determine whether there are variations in<unk>  prevalence between sexes. Two surveys in Japan showed that<unk>  prevalence in men was lower than that in women. A 2010 nationwide survey with participation of 4500 subjects in Japan showed the estimated<unk>  prevalence for men and women to be 7.9% and 12.3% respectively. Moreover, another nationwide survey with 5162 subjects in 2014 showed the prevalence for men and women to be 10.8% and 12.9% respectively. Contrarily, a different study in Japan with participation of 963 subjects indicated that the difference in<unk>  prevalence between men and women was not significant. The prevalence of<unk>  increases as people become older, with the highest in those aged 70 or above at 16%.<unk>  prevalence in people suffering from chronic pain was eight times higher than that of the general population. In addition, the number of orthopaedic surgery treatments in need of hospitalisation drastically rises after age 50 and reaches a peak after the age of 70.
Locomotive syndrome
Winter-over syndrome
Central pain syndrome
Narcissism
Sympathicolysis
Hard flaccid syndrome
DOOR syndrome
Stiff skin syndrome