证据

本页包含特色内容的快照，内容强调了探讨关键临床问题的证据，包括不确定性领域。敬请参阅主要专题参考文献列表，了解支持该专题的所有信息源详情。

BMJ Best Practice 临床实践证据表单

Evidence table logo

对于特定临床问题，通过 GRADE 和 BMJ Best Practice 临床实践有效性评级，证据表提供了导航简单的分层证据。通过表单底部链接，可获取专题正文相关证据评分，为临床问题提供更多参考。查阅证据表单，获取更多信息。

展开全部内容

What is the diagnostic yield of chest computed tomography (CT) scan in people with chronic cough, normal chest x-ray and physical exam?​​

该表单为针对聚焦上述重要临床问题的指南所报道分析（以系统综述为基础）内容进行的总结。

查看指南完整源信息

证据 C?

Confidence in the evidence is very low or low where GRADE has been performed and the intervention may be less effective or likely to be more harmful than the comparison for key outcomes. However, this is uncertain and new evidence could change this in the future.

人群： People with chronic cough and normal chest x-ray and physical examination

干预： Chest CT scan

比较： No chest CT scan

结局效能（BMJ 评价）?证据可信度（GRADE）?

Diagnostic yield

See note ᵃ

Very Low

源指南所述建议

We suggest that clinicians do not routinely perform a chest CT scan in patients with chronic cough who have a normal chest radiograph and physical examination.

注意

ᵃ The content of this table is based on four observational studies. One prospective study found that the diagnostic yield of chest CT scan was 3/46 (6.5%) participants, while three retrospective studies produced the following results: 20/34 (58%) participants, 9/21 (43%) participants, and 21/59 (36%) participants.

The guideline task force noted that the variation in the above results, regarding the diagnostic yield of CT scan, were unlikely to explain the cause of coughs or influence treatment.

The guideline task force also noted that there is concern about the potential cancer risk from CT radiation exposure, particularly in children and women, which should be weighed against any diagnostic yields.

该证据表单关联以下章节：

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