a significant trendp -value = 0.0292
The ADF test for LBP time series data of Chinese men indicated a significant trend ( p -value = 0.0292), confirming the series was smooth.
The ADF test for LBP time series data of Chinese men indicated a significant trend ( p -value = 0.0292), confirming the series was smooth.
3.2 Joinpoint regression analysis From 1990 to 2019, the age-standardized incidence and prevalence of LBP in China showed a decreasing trend, and the magnitude of the decrease varied over time for men and women.