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Statistical analysis

LH Li-Sha Huang
YH Yan Huang
JH Juan Hu
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The data were analyzed using SPSS 21.0. Numerical data are described with reference to the sample size, i.e. number of cases (n). Measurement data that had a nonnormal distribution in the Shapiro-Wilk normality test are expressed as medians (quartiles).

Comparisons between groups were analyzed using the nonparametric rank-sum test. Multiple factor analysis of KAP scores (treated as dependent variables) was conducted using a multivariate linear regression model. Statistically significant differences identified in single-factor analysis of the independent variable were entered into a multivariate linear regression equation (alpha-to-enter significance level = 0.05, alpha-to-remove significance level = 0.10). The reference group was deemed the dummy variable, and the partial regression coefficient (Beta) was applied.

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