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.
Meaning: Make an uncontrolled, short, jerky motion. Classified under: Verbs of grooming, dressing and bodily care. Synonyms: twitch; jerk. Context example: his face is twitching. Hypernyms (to twitch is one way to...): move involuntarily; move reflexively (move in an uncontrolled manner) Troponyms (each of the following is one way to twitch):