混杂偏倚的控制，研究一个危险因素和心肌损伤的关系，混杂因素是性别。列举三种情况，选择控制方法： （1）如果只想研究男性中的关系，如何做？ （2）如果在一个病例对照研究中，如何做？ （3）如果想单独分析男性或者女性，如何分析 把题干翻译成英文

Controlling for confounding bias, study the relationship between a risk factor and myocardial injury when the confounding variable is gender. Provide three scenarios and select a control method for each:

1. If only the relationship in males is of interest, how to proceed?
2. In a case-control study, how to proceed?
3. How to analyze males or females separately?

Translate the prompt into English.