Food security and its association with socioeconomic status and dietary diversity in free living older people in Tehran, Iran.

"Declarations Ethics approval and consent to participateThe study was performed in accordance with the Declaration of Helsinki and it was approved by the Research Ethics Committee of Shahid Beheshti Medical University of Iran, under protocol number IR.SBMU.NNFTRI.REC.1397.052. Written informed consent was also obtained from the studied participants. All participants enrolled in the study provided informed consent. If the subjects were illiterate informed consent was obtained from legal representative. Consent for publicationNot applicable. Competing interestsThe authors declare no competing interests. Competing interests The authors declare no competing interests."

"Funding This study was an MSc thesis which funded by National Nutrition and Food Technology Research Institute."