Quality evaluation mainly examined the authenticity of the data, whether the survey design was rigorous, whether the intervention process was strict, and whether statistical management was reasonable.
质量评价主要考察资料的真实性，调查设计是否严密，实施过程是否严格，统计学处理是否合理。
Statistical management: SPSS11.5 statistical software was used.
数据处理：采用SPSS11.5统计软件包进行数据处理。
Statistical management: SPSS11.5 statistical software was used.
数据处理：采用SPSS11.5统计软件包进行数据处理。
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