The measure of precarious employment and its impact on the mental health of workers: A systematic review 2007-2020.

Background: Precarious employment conditions can influence the worker's mental health; however, there is no consensus regarding the definition of precarious employment or the way it is measured.

Objective: The objective is to identify existing research of the conceptual framework, the ways to measure precarious employment and its impact on the mental health of workers.

Methods: A systematic review with the strategic search for observational-empirical and qualitative studies published between 2007 and 2020 in Embase, Scopus and PubMed, full text, in English and Spanish.