Main Outcome Measurements: Statistical analysis evaluating differences in measured data between methods and whether choice of method might alter treatment.
主要结果的测定∶统计分析评估各种方法之间测量数据差异，及不同方法的选择是否能够改变治疗的效果。
Conclusion The principles and methods for observational studies should be followed to reduce information bias, selection bias and confounding bias in statistical analysis of hospital data.
结论在对医院资料进行统计分析时，应遵循观察性研究的原则和方法，以避免可能存在的信息偏倚、选择偏倚和混杂偏倚。
Methods: Data was collected from medical record and infectious diseases reporting card in the TB clinic of Handan county, and statistical analysis was made.
方法：查阅邯郸县结防科的病历及传染病登记卡收集资料，进行统计学分析。
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