Paired samples t-test (2-tailed) comparing the change in quality of service mean scores before and after CQI support intervention by province.

Paired samples t-test (2-tailed) comparing the change in quality of service mean scores before and after CQI support intervention by province.配对样本t检验（双侧检验），用于比较各省份在实施持续质量改进（Continuous Quality Improvement，CQI）支持干预前后的服务质量平均得分变化。