Evidence is insufficient because of: 1  The limited number or size of studies. 2  Important flaws in study design or methods. 3  Inconsistency of findings across individual studies. 4  Gaps in the chain of evidence. 5  Findings not generalizable to routine primary care practice. 6  Lack of information on important health outcomes.
Definition of jerk for English Language Learners. : 1  a stupid person or a person who is not well-liked or who treats other people badly. : 2  a quick pull or twist. : 3  a sudden sharp movement.
What Does JERK Mean? JERK means An Idiot or Stupid Person. Although JERK can describe a person of any gender, it is most often used to describe males because it derives from the verb to jerk (meaning to masturbate), which is most often applied to men. From a women's perspective, a JERK is typically considered to be a selfish or manipulative man or one who sees women as a sexual conquest.