Objective:The right statistic method had been applied to the analysis of normal reference interval of CBC in Chengdu.
目的：确立正确的统计学方法统计成都市全血细胞计数各参数的正常参考区间。
Conclusions the reference interval of different gender can be combined, and the new reference interval can be acceptable.
结论不同性别人群可合并参考区间，合并后建立的参考区间本实验室可接受。
Conclusion: Many factors could affect the results of NAP, clinical lab should establish the reference interval depending on self-conditions and pay attention to the quality control.
结论：多种因素均对NAP实验结果构成影响，各实验室应根据自身实验条件而建立参考范围且实验过程中应注意质量控制。
Conclusion: Many factors could affect the results of NAP, clinical lab should establish the reference interval depending on self-conditions and pay attention to the quality control.
结论：多种因素均对NAP实验结果构成影响，各实验室应根据自身实验条件而建立参考范围且实验过程中应注意质量控制。
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