Table 1: The four phases of the research project on development and assessment of the socio-economic status scale for health research in Iran .

Phase	Description	Status
Phase1	Development of the questionnaire and assessment of its reliability and validity at Tabriz metropolis level	Present manuscript
Phase2	Assessment of diagnostic validity of the scale to detect marginal urban populations: 1000 households	At submission
Phase3	Generalizability of the questionnaire through its application at: 1- Other cities of province: 5000 households 2- Tehran as the capital of Iran:1000 households3-Some of other cities of Iran(40 districts from all provinces: 250 households)	Data collected. At analysis phase
Phase4	Assessment of the questionnaire in rural populations	Not conducted yet