a decreasing trendp < 0.001
an increasing trendp = 0.035
In terms of age, participants aged 6–19 years showed a decreasing trend ( p < 0.001), whereas those aged ≥ 40 years showed an increasing trend ( p = 0.035).
In terms of age, participants aged 6–19 years showed a decreasing trend ( p < 0.001), whereas those aged ≥ 40 years showed an increasing trend ( p = 0.035).