an increasing trendp < 0.05
The prevalence showed an increasing trend from 2008 to 2017, including a period of rapid rise from 2008 to 2011 ( p < 0.05); the increase in prevalence was greatest in people under 35 years old ( p < 0.05).
The prevalence showed an increasing trend from 2008 to 2017, including a period of rapid rise from 2008 to 2011 ( p < 0.05); the increase in prevalence was greatest in people under 35 years old ( p < 0.05).