Table 2. Summary of articles focusing on equity in health outcomes .

Author(s)	Aims	Study Design	Newcastle-Ottawa Scale**	Main outcome(s)
Emamian MH, Fateh M, Hosseinpoor AR, Alami A, Fotouhi A.(17)	To describe socio-economic inequality with obesity and its associated factors	A cross-sectional study through analyzing the national surveillance data for 2005	Good	Slop index of inequality Concentration Index Decomposition inequality in obesity
Farzadi F, Ahmadi B, Shariati B, Alimohamadian M, Mohamad K.(18)	Looks at the trend in the population gender ratio from 1956 to 2006, with a focus on analyzing mortality rates and hence the overall health of Iranian women	A cohort analysis on population censuses in Iran	Good	“Comparison of Mortality in the 25–34 years age group in 1956–1966 compared with subsequent decades.
Gooshki ES, Rezaei R, Wild V.(19)	To shed light on the health of migrants in Iran from the perspective of social justice	A systematic Review	Satisfactory	Adverse health consequences for population
Moradi-Lakeh M, Bijari B, Namiranian N, Olyaeemanesh A-R, Khosravi A. (20)	To assess the trend of geographical disparities between rural areas	A trend observational study	Good	Crude Mortality Rate Neonatal Mortality rate Infant Mortality Rate Under Five Mortality Rate
Nedjat S, Hosseinpoor AR, Forouzanfar MH, Golestan B, Majdzadeh R. (21)	This study aims to estimate health inequality between different socioeconomic groups and its determinants	A cross-sectional study through a Population survey in Tehran	Good	Concentration Index Decomposing socio-economic factors affecting the health status
Emamian MH, Zeraati H, Majdzadeh R, Shariati M, Hashemi H, Jafarzadehpur E, et al. (22)	To investigate economic inequality and its determinants in near vision, in a middle-aged population	A cross-sectional study	Good	The main contributors of gap between lower and higher socio-economic group through Oaxaca-Blinder Decomposition
Morasae EK, Forouzan AS, Majdzadeh R, Asadi-Lari M, Noorbala AA, Hosseinpoor AR. (23)	To measure socioeconomic inequality in mental health, and then to untangle and quantify the contributions of potential determinants of mental health to the measured socioeconomic inequality	A cross-sectional study through a Population survey in Tehran	Good	“The overall CI of mental health in Tehran was -0.0673 (95% CI = -0.070 - -0.057). Decomposition of the CI revealed that economic status made the largest contribution (44.7%) to socioeconomic inequality in mental health. Educational status (13.4%), age group (13.1%), district of residence (12.5%) and employment status (6.5%).”
Ramezani Doroh V, Vahedi S, Arefnezhad M, Kavosi Z, Mohammadbeigi A. (24)	To decompose the health inequality of people living in Shiraz	A cross-sectional study through a multistage-sample survey	Good	Concentration Index for Mental and General Health Decomposing inequality
Veisani Y, Delpisheh A. (25)	To understand the determinants of socioeconomic inequality of mental health in the female-headed households	A cross-sectional study	Satisfactory	Concentration Index Decomposing Inequality
Amirian H, Poorolajal J, Roshanaei G, Esmailnasab N, Moradi G. (26)	The effect of inequity on health outcomes was investigated via a three-stage procedure	A cross-sectional study through a multistage-sample survey	Good	Concentration Index
Khajavi A, Pishgar F, Dehghani M, Naderimagham S. (27)	To assess inequalities in infant mortality in rural regions	A trend analysis in national scale	satisfactory	Comparing the decreasing rate of mortality over the time
Alizadeh M, Laghousi D. (28)	To assess the trend of geographical disparities in child and maternal mortality rates	A population-based trend analysis	satisfactory	Index of Disparity in Neonatal, Infant and Under Five Mortality Rates between 1999 and 2013.
Rarani MA, Rashidian A, Arab M, Khosravi A, Abbasian E.(29)	To measured socioeconomic inequality in under-five mortality in Iran and across its provinces.	A cross-sectional study on multiple indicator demographic and health Survey	satisfactory	Concentration Index for Under Five Mortality Rate.
Kiadaliri AA. (30)	To assess gender and social disparities in Esophagus cancer incidence across Iran’s provinces through 2003-2009	A trend analysis by Iran National Statistical Centre	Satisfactory	Rate ratios and Kunst and Mackenbach relative indices of inequality (RIIKM) were used to assess gender and social inequalities
Kiadaliri AA, Saadat S, Shahnavazi H, Haghparast-Bidgoli H. (31)	To assess overall, gender and social inequalities across Iran’s provinces during 2006–2010.	A time trend province-level study	Good	Rate ratio and Kunst and Mackenbach relative index of inequality were used to assess overall, gender and social inequalities, respectively.
Ghorbani Z, Ahmady AE, Ghasemi E, Zwi A. (32)	To identify the socioeconomic distribution of perceived oral health among adults	A cross-sectional population-based survey in Tehran	Good	Concentration Index of non-replaced extracted teeth (NRET), and m perceived dental health
Hosseinpoor AR, Mohammad K, Majdzadeh R, Naghavi M, Abolhassani F, Sousa A, et al. (33)	To measure the socioeconomic inequality in infant mortality in Iran	A cross-sectional study on Iran Demographic and Health Survey data	Good	Concentration Index in Infant Mortality Decomposition Inequality
Hosseinpoor AR, Van Doorslaer E, Speybroeck N, Naghavi M, Mohammad K, Majdzadeh R, et al. (34)	To quantify the determinants' contributions of socioeconomic inequality in infant mortality	A cross-sectional study on Iran Demographic and Health Survey data	Good	Decomposing of Inequality
Almasi-Hashiani A, Sepidarkish M, Safiri S, Morasae EK, Shadi Y, Omani-Samani R.(35)	To determine the economic inequality in history of stillbirth and understanding determinants of unequal distribution of stillbirth in Tehran, Iran.	A population-based cross-sectional study	Good	“Decomposition of the Concentration Index of stillbirth
Rad EH, Khodaparast M. (36)	Taxation system and health insurance contribution of Iranians were assessed	A cross-sectional analysis on data obtained from Iran Statistical Center.	Satisfactory	Kakwani Index of health insurance contribution
Emamian MH, Zeraati H, Majdzadeh R, Shariati M, Hashemi H, Fotouhi A. (37)	To report the status of the unmet refractive need and the role of economic inequality	A cross-sectional nested case-control	Good	Oaxaca-Blinder decomposition method of unmet refractive need
Hosseinkhani Z, Nedjat S, Aflatouni A, Mahram M, Majdzadeh R. (38)	To assess the association of child maltreatment with socioeconomic status among schoolchildren	A cross-sectional study	Satisfactory	Concentration Index of child maltreatment
Mansouri A, Rarani MA, Fallahi M, Alvandi I. (39)	To estimate and decompose educational inequalities in the prevalence of IBS	A cross-sectional study	Good	Concentration Index
Fateh M, Emamian MH, Asgari F, Alami A, Fotouhi A.(40)	To investigate the socioeconomic inequality of hypertension in Iran and to identify its influencing factors	A cross-sectional study	Good	Slop index of inequality (SII) and concentration index (C) for hypertension. Oaxaca–Blinder decomposition
Moradi G, Ardakani HM, Majdzadeh R, Bidarpour F, Mohammad K, Holakouie-Naieni K. (41)	To determine the socioeconomic status (SES) of inequalities and the proportion of the determinants in nonuse of seat belts in cars and helmets on motorcycles	A cross-sectional study	Good	The concentration index, concentration curve, and comparison of Odds Ratio (OR) in different SES groups were used to measure the socioeconomic inequalities using logistic regression.
Veisani Y, Delpisheh A, Moradi G, Hassanzadeh J, Sayehmiri K. (42)	To estimate the relationship between the socioeconomic status and addiction and mental disorders in suicide attempts	A cross-sectional study	Good	concentration index (CI) and decomposing contribution in inequality
Tourani S, Zarezadeh M, Raadabadi M, Pourshariati F.(43)	Determining regional disparity of obstetrics and gynecology services and its association with children and infant mortality rates	A cross-Sectional Study	Satisfactory	Gini Coefficient
Entezarmahdi R, Majdzadeh R, Foroushani AR, Nasehi M, Lameei A, Naieni KH.(44)	To measure inequality of disability in leprosy	A cross-sectional study	Satisfactory	extended concentration index decomposition
Moradi G, Mohammad K, Majdzadeh R, Ardakani HM, Naieni KH.(45)	To determine socioeconomic inequalities in risk factors for NCDs	A trend analysis of inequality	Good	Concentration Index
Naghdi S, Ghiasvand H, Zadeh NS, Azami S, Moradi T.(46)	To estimate the impact of some macro-economic factors specially inequality factors on the Iranian rural health status	A time trend ecological study	Satisfactory	Gini Coefficient
Kiadaliri AA.(47)	Investigating social disparities in breast cancer (BC) and ovarian cancer (OC) incidence rates among women	A time trend province-level study	Satisfactory	rate ratio and Kunst and Mackenbach relative index of inequality were used to assess social disparities
Kia AA, Rezapour A, Khosravi A, Abarghouei VA.(48)	To assess the socioeconomic inequality in malnutrition in under-5 children	A crosse-sectional study	Good	Concentration Index
Moradi G, Moinafshar A, Adabi H, Sharafi M, Mostafavi F, Bolbanabad AM. (49)	To evaluate socioeconomic inequalities in the oral health status	A crosse-sectional study	Satisfactory	Concentration Index
Kiadaliri AA, Asadi-Lari M, Kalantari N, Jafari M, Mahdavi MRV, Faghihzadeh S.(50)	To examine educational inequalities among adults	A population based cross-sectional study	Good	Slope Index of Inequality (SII) and the Relative Index of Inequality (RII)
Emamian MH, Zeraati H, Majdzadeh R, Shariati M, Hashemi H, Fotouhi A.(51)	To explore inequality in visual impairment	A cohort study	Good	Blinder-Oaxaca decomposition
Hosseini M, Olyaeemanesh A, Ahmadi B, Nedjat S, Farzadi F, Arab M, et al.(52)	To identify the state of gender equity in the health sector of the Islamic Republic of Iran	A mixed method	Satisfactory	Gender Inequality in different aspects of health indicators
Moradi G, Majdzadeh R, Mohammad K, Malekafzali H, Jafari S, Holakouie-Naieni K.51	To determine the status of diabetes socioeconomic inequality and the share of determinants of inequalities	A time trend comparative study	Good	Concentration Index Decomposition Inequality
Emamian MH, Fateh M, Gorgani N, Fotouhi A.(53)	To describe the socio-economic inequality in stunting and its determinants	A cross-sectional population-based	Good	Concentration Index Oaxaca-Blinder Decomposition
Raeisi A, Mehboudi M, Darabi H, Nabipour I, Larijani B, Mehrdad N, et al.(54)	To investigate the socioeconomic inequality of overweight and obesity among the elderly	prospective cohort study	Good	Concentration Index and the Lorenz curve
Safiri S, Kelishadi R, Heshmat R, Rahimi A, Djalalinia S, Ghasemian A, et al.(55)	To describe the socioeconomic inequality associated with oral hygiene behavior	A cross-sectional Study	Good	Concentration Index (C) and the slope index of inequality (SII)
Peykari N, Djalalinia S, Qorbani M, Sobhani S, Farzadfar F, Larijani B. (56)	Summarizing evidences on associations between socioeconomic factors and diabetes in Iranian population	A systematic review	Good	The prevalence of diabetes among different socio-economic and demographic groups.
Ravaghi H, Goshtaei M, Olyaee Manesh A, Abolhassani N, Arabloo J (57)	Obtain a deeper understanding of the development of health equity indicators and identify their implementation challenges	A qualitative study	Satisfactory	Shaping the stakeholder’s perspective for different health inequality indicators
Zaboli R, Tourani S, Seyedin SH, Manesh AO (58)	To determine and prioritize the social determinants of health inequality in Iran	A mixed method	Good	Shaping framework for including SDH approach in health equity
Beheshtian M, Manesh AO, Bonakdar S, Afzali HM, Larijani B, Hosseini L, et al.(59)	Determining health equity indicators in Iran	A literature review	Satisfactory	“52 indicators have been determined as health equity indicators in five areas including health, social and human development, economic development, physical environment and infrastructure and governance. “
Sadeghipour Roudsari H, Sherafat Kazemzadeh R, Rezaeie M, Derakhshan M.(60)	To assess the knowledge, attitudes and practices of men, Iranians and Afghan refugees, regarding reproductive health	A cross-sectional Study	Satisfactory	“Mean scores for knowledge, attitudes and practices for Iranians were 4.38/30, 13.89/20 and 12.99/31 respectively; for Afghans the scores were 3.79/30, 11.66/20 and 11.88/31.”