INTRODUCTION

Overweight and obesity are among the main factors that contribute to non-communicable diseases (NCDs), such as diabetes mellitus type 2, high blood pressure, cardiovascular diseases, some types of cancers, and musculoskeletal disorders [1]. According to a report published by the World Health Organization (WHO) in 2014, around 1.9 billion adults (people over 18 years of age) were overweight, and more than 600 million were obese [2]. It is expected that by 2030, more than 2.16 billion people will be overweight and 1.12 billion obese [3]. For this reason, obesity is considered an overt threat to public health around the globe. Research has shown that obesity and an increase in waist circumference can escalate the risk of NCDs, such as diabetes mellitus type 2 and cardiovascular disease [4,5]. Therefore, one of the aims of the WHO 2013-2020 Global Action Plan to prevent and control NCDs is to stop the rise in obesity by the year 2025 [6].

In addition to the impact of obesity on disease, the economic effects of obesity on families, healthcare systems, and the global economy are considerable. The direct medical costs of obesity include those for the prevention, diagnosis, and treatment of obesity and related diseases. In general, European countries allocate approximately 2-8% of their healthcare budgets to obesity, equaling about 0.6% of their gross national income (GNI) per capita. Based on data gathered in the United States in 2008, it has been speculated that overweight and obesity consume US$147 billion in overall medical costs. To make matters worse, the indirect costs of overweight and obesity are clearly higher what has been reported. The direct and indirect costs of obesity may include the loss of a decent salary, the loss of vocational opportunities through the limitation of physical capabilities, the incidence of diseases, and early death. In fact, obesity is becoming a pandemic around the world and will cause unprecedented health, economic, and social tensions unless urgent measures are taken to change this trend [7].

The Human Development Index (HDI) categorizes countries among 3 levels of development based on data reported by the United Nations Development Program. This index is determined by 3 factors: long and healthy life, possession of knowledge, and standard of living. The criterion of a long and healthy life is based on the life expectancy index, possession of knowledge is measured by the mean of years of education and by expected years of education, and standard of living is measured by the GNI per capita [8]. Various studies have revealed a positive correlation between HDI and many chronic diseases, such as different types of cancer [9,10] and anemia [11]. Similarly, the level of development of societies can affect factors that contribute to obesity. Given the possible role of HDI in the prevalence of obesity and overweight, this study set out to investigate the relationship of the standard prevalence of obesity and overweight in males and females with HDI and its components in countries in the WHO Eastern Mediterranean Region (EMR). Since factors such as income inequality, educational background, and availability of healthcare services and centers may affect obesity, this study investigated the relationship of HDI (as well as its components) with obesity and overweight.

METHODS

This ecological study investigated the relationship of the standard prevalence of obesity and overweight in both males and females with HDI and its components (life expectancy, mean number of years of education and expected years of education, and GNI per capita) in EMR countries. The HDI data were gathered from 2 data sources: the latest report from the United Nations [8] regarding body mass index (BMI) and the latest report from the WHO website [12] regarding the standard prevalence of overweight and obesity in adults (18 years of age or older) based on sex. On the BMI scale, a BMI equal to or above 25.0 kg/m² constitutes overweight, and a BMI equal to or above 30.0 kg/m² constitutes obesity.

The EMR includes the following 22 countries: Cyprus, United Arab Emirates, Qatar, Saudi Arabia, Bahrain, Oman, Kuwait, Islamic Republic of Iran, Lebanon, Tunisia, Jordan, Libya, Egypt, Iraq, Morocco, Pakistan, Syrian Arab Republic, Sudan, Afghanistan, Djibouti, Yemen, and Somalia. Statistical analysis was conducted using SPSS version 24.0 (IBM Corp., Armonk, NY, USA). In order to assess the relationships of BMI, obesity, and overweight with HDI and its components, the Pearson correlation coefficient was calculated, with p-values of less than 0.05 considered to indicate statistical significance.

Ethics Statement

This study is not subject to ethical review as it is conducted using public data of 2018 report from the United Nations and latest report from the WHO (published in 2018).

RESULTS

Information obtained from the 22 EMR countries was analyzed. As observed in Figure 1 and Table 1, there were statistically significant differences between males and females with regard to obesity and GNI per capita; in particular, the prevalence of obesity was higher in females than in males, and the GNI per capita was higher for males than for females (p<0.05). Figures 2 and 3 show the estimated GNI per capita and the prevalence of obesity, respectively, in females and males in EMR countries. The highest prevalence of obesity and overweight in females and males was observed in Kuwait, in which the obesity prevalence rates were 45% and 33% in females and males, respectively, while the overweight prevalence rates in females and males were 75% and 72%, respectively. The mean HDI was lower for females than for males (0.65 and 0.74, respectively). However, the mean life expectancy was higher in females than in males (74 years for females and 70 years for males). The 2 educational indices (mean number of years of education and expected number of years of education) were not statistically significantly different between the sexes and had approximate values of 7 and 12, respectively. The GNI per capita (purchasing power parity US$) was 11 497 for females and 34 071 for males.

The results of the statistical analysis shown in Table 2 reveal a significant positive correlation between HDI and its components and the obesity and overweight indices in females and males. As such, higher life expectancy was associated with higher numbers of years of education and expected years of education in both females and males, as well as obesity, overweight, and BMI (p<0.05). Similarly, we found a significant positive correlation between the total per capita income and the prevalence of obesity and overweight (p<0.05). Nevertheless, no significant correlation was observed among BMI, HDI, mean number of years of education, and GNI per capita in females. Likewise, no significant correlation was observed between life expectancy and BMI.

DISCUSSION

Obesity is caused by a positive energy balance in the body resulting from factors such as high energy consumption (via eating large portions or consuming foods of high energy density) or low physical activity. Such factors are usually a result of Westernization and ample economical wealth, as shown by the high frequency of obesity in Western industrial countries. Public health strategies implemented to prevent obesity have proved poorly effective. Worldwide, the number of overweight people is currently considerably higher than the number of underweight people [12]. Although personal obesity treatments have been found useful to a certain extent, it has been challenging to find the best method to overcome this health problem globally. Therefore, the identification of effective policies to counter obesity in societies is an international priority.

In line with the findings of previous research [13,14], the results of this study show that the prevalence of obesity was higher among females than males. The higher obesity rate among females may result from early marriage, the secretion of sex hormones, a relative lack of physical activity, or the presence of certain neurological disorders, such as depression [15]. As stated by Musaiger [16] in his systematic review of EMR countries, obesity has reached a critical state in all countries in this region. Several factors are at play in this regard: nutritional transition, lethargy, urbanization, marital status, short breastfeeding span, frequent snacking, skipping breakfast, drinking excessive amounts of sweet drinks, eating out in restaurants, eating in front of the television, the improved marketing of high-fat foods, short stature, body image, cultural variables, and food subsidy policies [16].

The findings of this study show a significant positive relationship between the GNI per capita and the prevalence of obesity and overweight in both females and males. This finding agrees with the results of previous studies by Wells et al. [17] and Ng [18], which reported a significant positive relationship between the GNI per capita and the prevalence of obesity in both sexes. Industrialization was followed by increased income, lethargy, and changes in nutritional habits toward eating fast, fattier food. Moreover, urbanization also had an impact on the facilitation of the obesity process in different societies. Ng [18] reported a negative correlation between overweight and the number of rural inhabitants in a society. The current study showed that the mean HDI was lower for females than for males, while the life expectancy was higher for females than for males; however, the mean number of years of education and expected years of education were not statistically significantly different between the sexes.

The GNI per capita was 3 times lower for females than males, resulting in a lower HDI in females in spite of their higher life expectancy. Based on data collected in the 1990s, an international comparison of the obesity rate in females showed that in underdeveloped countries, obesity was dependent on the gross national product and the socioeconomic characteristics of the population [19]. The economic inequality in industrial countries (the Gini index) has a positive correlation with the obesity rate, and countries with the highest degree of inequality have experienced the highest prevalence of obesity [20]. Obesity is impacted not only by personal factors but also by an array of socioeconomic factors.

The analysis of the recent changes in developing and developed countries demonstrate that, in most cases, obesity is remarkably prevalent in economically successful countries. Nevertheless, in some cases, the fastest growth in the obesity rate has been observed in countries with low socioeconomic status. Clearly, there is no simple relationship between obesity and economic wealth, either within or among countries. Thus, given the effects of a globalized economy, we must take an international stand and investigate how the globalization of the economy has affected the prevalence of obesity.

One important factor is the extent to which males and females, under the influence of socioeconomic factors, can experience obesity risks differently. Females may be more resilient than males to famine and are more susceptible to obesity. Hence, females may be more sensitive than males to the contemporary prevalence of obesity. Sex-based inequality is common, and is usually accompanied by discrimination, destitution, and relatively poorer healthcare. The analyses conducted in this study demonstrate that sex differences can have profound impacts on the prevalence of obesity and economic issues. The obesity rate, however, was not similar among the countries examined; rather, it was found to be higher in the countries that exhibit serious sex inequality [21]. These findings appear to reveal that the improvement of female’s socioeconomic and healthcare conditions can be regarded as an effective treatment targeting obesity in females.

Research has shown that the BMI of females is generally higher than that of males in developing countries [21]. For example, Ferretti and Mariani [22] observed that the ratio of obesity in females to that in males is directly related to sex inequality, and similarly, the prevalence of obesity is affected by sex inequality. More than 2 decades of research (from 1990 to 2011) has revealed that the prevalence of obesity has reached a critical rate in EMR countries. The prevalence of overweight in preschool students (5 years of age) has been reported to range from 1.9% to 21.9%, whereas the prevalence of overweight and obesity in school-aged students ranged from 7.0% to 45.0%. Among adults, the prevalence of overweight and obesity ranged from 25.0% to 81.9%.

It is obvious that the widespread prevalence of obesity is a global issue. However, it is impossible for all countries to tackle this problem in the same way. The overall findings of this study reveal that life expectancy, education level, and standard of living are significantly associated with overweight and obesity. This study is an ecological study that utilized data published by the WHO and the World Bank. This study has some limitations. First, in such studies, there may be no relationship present at the individual or the community level. These types of studies provide only a general view of society, and the relationships observed cannot be extrapolated to other populations. It is necessary to plan and conduct studies more specifically focused on certain relationships in order to generalize the relationships observed at the community level.

However, based on the findings, although it can be inferred that an increase in HDI is associated with increased prevalence of obesity, it is not accurate that policy-makers should slow down the process of development in their countries. Policymakers must be aware that as they attempt to improve the welfare of the people, they should also be cautious about some side effects of development, such as obesity. Overall, this study pinpoints the necessity of developing strategies and roadmaps that can bring about welfare improvements to society while improving the healthcare available to the people.

Notes

CONFLICT OF INTEREST

The authors have no conflicts of interest associated with the material presented in this paper.

FUNDING

None.

ACKNOWLEDGEMENTS

Notes

AUTHOR CONTRIBUTIONS

Conceptualization: AA, EMA. Data curation: DA, EMA, EJ. Formal analysis: EMA, AA. Funding acquisition: None. Methodology: EMA, AA. Visualization: EMA, EJ, DA. Writing - original draft: EMA, AA. Writing - review & editing: DA, EJ, EMA.

Figure. 1.

The status of overweight, obesity and body mass index (BMI) in Eastern Mediterranean Region countries, 2018.

Figure. 2.

Estimated of gross national income (GNI) per capita in Eastern Mediterranean Region countries in 2018. PPP, purchasing power parity.

Figure. 3.

Age-standardized prevalence of obesity in Eastern Mediterranean Region countries in 2018.

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Figure & Data

References

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