Figure 5From: The prevalence of clinically diagnosed ankylosing spondylitis and its clinical manifestations: a nationwide register studyThe point prevalence of clinically diagnosed ankylosing spondylitis (AS) in Sweden on 31 December 2009 (according to the base case definition), among those aged 30 to 64 years, stratified according to the level of formal education and age in 2009.Back to article page