highly significantP < 0.05
The regression analysis results are shown in Table 2 , where the asterisk next to the coefficient indicates its statistical significance level (*** P < 0.001: indicates significant results at a 99.9% confidence level, with extremely high statistical significance, ** P < 0.01: indicates that the result is significant at a 99% confidence level and highly significant, * P < 0.05: Indicates that the result is significant at a 95% confidence level).