The observation group was treated with VATS, and the control group only received conventional thoracotomy.

观察组采用电视胸腔镜手术治疗，对照组采用常规开胸手术治疗。

youdao

Conventional care of interventional therapy was adopted for the control group, the observation group were given mental nursing intervention on the basis of conventional care.

对照组采用神经介入治疗的常规护理，观察组在常规护理基础上给予心理护理干预。

youdao

Control group implements conventional nursing, the observation group strengthens the health education in the conventional nursing foundation.

其中对照组实施常规护理，观察组在常规护理基础上加强健康教育。

youdao

One problem: The Erbitux trial lacks a control group or a comparison to conventional chemotherapy, so the study does not show clear survival benefit.

FORBES: Puncturing The ImClone Hype

In conventional studies, patients are randomly assigned to a treatment or control group to reduce sources of bias.

WSJ: ALS Study Falls Short, But Use of Social Media Holds Promise