marginal significanceP <0.1
We observed non-significant time trends of prevalence in both overall and stratified populations (linear, quadratic, cubic trends: all P > 0.05) despite of some marginal significance (0.05< P <0.1).
We observed non-significant time trends of prevalence in both overall and stratified populations (linear, quadratic, cubic trends: all P > 0.05) despite of some marginal significance (0.05< P <0.1).