**6. Conclusions**

At the beginning of this paper, we noted that the relationship between job satisfaction and mental health is mainly considered harmonious, and that there is scarce research about the anomalous/misaligned patterns between these two variables. The main aim of this study was to extend the relationship between job satisfaction and mental health by identifying four patterns: satisfied-healthy, satisfied-unhealthy, unsatisfied-healthy, and unsatisfied-unhealthy. This taxonomy seems to provide a valid, interesting, and useful way to study employees' wellbeing by considering their job satisfaction and mental health. It is our hope that addressing this more extended pattern of relationships between the two variables will lead to a possible resolution of the satisfied-healthy conundrum. Thus, the unsatisfied-healthy or satisfied-unhealthy profiles should be the targets of future research. Moreover, this research has contributed to identifying some organizational and personal antecedents that influence and differentiate the four patterns. Future research will need to study how stable or dynamic these patterns are over time, and what their consequences are in the long run. This knowledge will help us to create more effective interventions so that organizations can assist millennials in moving toward a more positive and optimal job satisfaction level and assess its contribution to health and vice-versa.

**Author Contributions:** T.A.A. performed formal analyses, visualization, and writing–original draft; Y.A. was responsible for the study conception, design, data curation, and writing–review & editing; J.M.P and S.Z. contributed to the conceptualization, project administration, supervision, and writing–review & editing.

**Funding:** The present study has been prepared with the support of the project PSI2015-64862-R (MINECO/FEDER). It was also supported by the PROGRAM PROMETEO/2016/138 of the GV. The third author has received a pre-doctoral scholarship, CVU 326153, from the National Council on Science and Technology of Mexico (CONACYT).

**Acknowledgments:** The authors also thank the IVIE for the authorization to use the database from the Spanish Observatory of Youth Labor Market Entry and Employment.

**Conflicts of Interest:** The authors declare no conflicts of interest.
