**5. Conclusions**

This was the first study undertaken to study the determinants of sunscreen usage behavior, using the fourth-generation, multi-theory model (MTM) of health behavior change. All the constructs of MTM were found to be significant predictors of sunscreen use among Floridians, thereby lending support to this model. All the constructs of MTM are modifiable, making it a practical approach for effecting behavior change. This study provides preliminary data to develop and test theory-based interventions to promote sunscreen usage among Florida residents.

**Author Contributions:** Conceptualization, M.S.; methodology, M.S., M.A., E.L.-W., J.M., M.B., R.L.; software, M.S., M.A., M.B.; validation, M.S., M.A., E.L.-W., J.M., M.B., R.L., K.B.; formal analysis, M.A.; investigation, M.S., M.A., E.L.-W., J.M., M.B., R.L., K.B.; resources, M.S.; M.A., E.L.-W., J.M., M.B.; data curation, E.L.-W., J.M., M.B.; writing, M.S.; M.A., E.L.-W., J.M., M.B., R.L., K.B.; writing—review and editing, M.S., M.A., E.L.-W., J.M., M.B., R.L., K.B.; visualization, M.S., M.A., K.B.; supervision, M.S.; project administration, M.S., E.L.-W., M.B. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research received no external funding.

**Institutional Review Board Statement:** This study was conducted according to the guidelines of the Declaration of Helsinki and approved by the Institutional Review Board (or Ethics Committee) of the University of North Florida (1015079-8 dated 5 April 2021).

**Informed Consent Statement:** Informed consent was obtained from all subjects involved in the study.

**Data Availability Statement:** The data presented in this study are available on request from the corresponding author. The data are not publicly available due to ethical reasons.

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