The outcome of a personal injury trial can be affected by many factors, including:

1. Evidence: The strength and credibility of the evidence presented at trial can have a significant impact on the outcome of the case. This can include physical evidence, such as medical records and accident reports, as well as witness testimony.

2. Liability: If the defendant is found to be at fault for the plaintiff's injuries, the plaintiff is more likely to receive a favorable verdict. However, if the plaintiff is found to be partially at fault for their injuries, the amount of compensation they receive may be reduced.

3. Damages: The amount of damages the plaintiff is seeking can also affect the outcome of the case. Juries may be more sympathetic to plaintiffs who have suffered significant injuries and are seeking substantial compensation.

4. Jury: The composition of the jury can also have an impact on the outcome of the case. Jurors who have had personal experiences with similar injuries or with the legal system may be more sympathetic to the plaintiff's case.

5. Judge: The judge presiding over the case can also influence the outcome. Some judges may be more sympathetic to plaintiffs in personal injury cases, while others may be more skeptical of personal injury claims.

6. Expert witnesses: Expert witnesses can provide valuable testimony in personal injury cases, particularly in cases involving complex medical issues. The credibility and effectiveness of these witnesses can have a significant impact on the outcome of the case.

7. Settlement negotiations: Many personal injury cases are settled before they go to trial. The outcome of settlement negotiations can affect the compensation the plaintiff receives and can impact the likelihood of the case going to trial.

These are just a few of the many factors that can affect the outcome of a personal injury trial. It's important to work with a skilled personal injury attorney who can help you navigate these factors and build a strong case on your behalf.