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Prevalence and Determinants of Obesity and Overweight Among Children and Adolescents in the Middle East and North African Countries: An Updated Systematic Review
Authors Alruwaili BF, Bayyumi DF, Alruwaili OS , Alsadun RS, Alanazi AS, Hadi A, Alruwaili NKS, Thirunavukkarasu A, Aldaghmani NF, Alrayes AA
Received 19 February 2024
Accepted for publication 15 May 2024
Published 21 May 2024 Volume 2024:17 Pages 2095—2103
DOI https://doi.org/10.2147/DMSO.S458003
Checked for plagiarism Yes
Review by Single anonymous peer review
Peer reviewer comments 2
Editor who approved publication: Dr Konstantinos Tziomalos
Bashayer Farhan Alruwaili,1 Duaa Fahad Bayyumi,1 Ohud Saud Alruwaili,1 Razan Saud Alsadun,1 Amal Sulaiman Alanazi,2 Amal Hadi,2 Nada Kareem S Alruwaili,3 Ashokkumar Thirunavukkarasu,1 Norah Farhan Aldaghmani,4 Aljawharah Abdulrahman Alrayes4
1Department of Family and Community Medicine, College of Medicine, Jouf University, Sakaka, Saudi Arabia; 2Department of Family Medicine, King Abdulaziz Medical City, Riyadh, Saudi Arabia; 3Department of Primary Healthcare, Ministry of Health, Aljouf Health Cluster, Sakaka, Saudi Arabia; 4College of Medicine, Jouf University, Sakaka, Saudi Arabia
Correspondence: Bashayer Farhan Alruwaili, Department of Family and Community Medicine, College of Medicine, Jouf University, Aljouf, Saudi Arabia, Tel +00966 55 191 3665, Email [email protected]
Abstract: In recent years, the countries of the Middle East and North Africa (MENA) region have experienced alarming increases in the prevalence of childhood overweight and obesity. This updated systematic review sought to measure the prevalence and determinants of obesity and overweight among children and adolescents in MENA countries. A literature search for relevant observational studies published in English was conducted using PubMed, Web of Science, Google Scholar, and Saudi Digital Library. The risk of bias was evaluated using the Newcastle-Ottawa Scale. Twenty-one published articles during the past five years were included in the systematic review. Varied approaches were used to diagnose childhood overweight and obesity, including the International Obesity Taskforce (IOTF), Centre for Disease Control (CDC), World Health Organization (WHO), and Saudi Growth Pattern Curves. We found that the combined prevalence of childhood overweight and obesity in the Middle East is up to 49.4%, depending on the methods applied in their studies. Risk factors identified were age, male gender, lack of sufficient physical activity, consumption of fried food, perceived stress level, number of family members, family size, mother’s occupation, education level, family history of obesity, high energy consumption from carbohydrates, ≥ 2 hours spent on watching television on weekend days with overweight, and always eating breakfast while watching television with obesity. The results of this review indicate that the issue of childhood and adolescent overweight and obesity in the Middle East is substantial and concerning. Most of the risk factors identified are modifiable and, if given appropriate attention, could significantly reduce the burden of associated chronic complications.
Keywords: childhood obesity, screen time, adolescents, Saudi growth pattern, WHO, CDC
Introduction
Globally, public health is being challenged by the increasing prevalence of chronic non-communicable diseases (NCDs).1,2 In high-income nations, NCDs are the principal cause of morbidity and mortality.3,4 In fact, they have already overtaken the healthcare systems of populations in a large number of low- and middle-income nations owing to the adoption of unhealthy lifestyle factors such as a lack of sufficient physical activities, unhealthy dietary habits, and excessive screen time.5 NCDs are responsible for 60% of all mortalities, of which 80% occur in low- and middle-income nations.6
Obesity is regarded as the predominant risk factor for numerous NCDs.7,8 In the last few years, attention has been diverted towards its prevalence among children, and it is called childhood obesity.9,10 Childhood and adolescent obesity and overweight have become significant public health concerns worldwide, with particularly alarming trends observed in the Middle East and North African (MENA) countries.11,12 The increasing rates of obesity and overweight among children and adolescents in this region pose substantial challenges to individual health outcomes, healthcare systems, and societal well-being. Research evidence has confirmed the possible causal association of childhood obesity with metabolic syndrome,13 dyslipidemia,14 type 2 diabetes mellitus,15 hypertension,16 hepatic steatosis,17 asthma,18 early onset adulthood cardiovascular diseases,19 and even premature mortality.20
According to the World Health Organization (WHO) report, over 1 billion individuals globally are obese (39 million children, 340 million adolescents, and 650 million adults), and these figures are exponentially rising. As per WHO statistics, by 2025, about 167 million individuals (children and adults) will lose their health and well-being due to increasing overweight or obesity.21 According to estimates by the World Obesity Federation (WOF), 254 million children are expected to be obese by 2030.22 It is worth noting that there is evidence of geographical differences in the epidemiology of childhood overweight and obesity.23–25
For countries in the MENA region, only a handful of studies have been conducted to explore the growing issue of childhood overweight and obesity with diverse reference standards, posing a challenge to compare the prevalence of obesity across geographical boundaries. Childhood obesity is largely caused by poor dietary practices, including eating too many foods high in calories and too few fruits and vegetables. Traditionally, the dietary pattern in this region is characterized by dates, whole grains, fruits, vegetables, and lean meat. Nonetheless, the trend is changing toward a high intake of high-caloric junk food among children and adolescents.26–28 Nutrition information, attitudes, and practices are important factors influencing children’s dietary behaviour. Healthy eating habits depend on adequate nutrition information and adopting positive nutrition attitudes and practices.29 The existing works literature indicates the complex relationship between socioeconomic status (SES) and obesity prevalence among children as the association varies by sex, age group, and country. Typically, socioeconomic groups who have more opportunities to consume diets rich in calories (poor SES in developed nations and high SES in developing countries) are more likely to be obese compared to other groups.30–32 Another critical factor to be addressed is physical activities, which are being demonstrated to be an effective intervention for addressing childhood obesity and its associated risk factors and complications.33,34 Regular physical activities are not only critical in helping prevent obesity among children but also it is critical in treating children suffering from obesity with chronic problems.33–36 However, recent studies indicate that children in this region are not physically active to meet the recommended guidelines.33,37 Furthermore, other studies reported that instituting proper early intervention and preventive strategies can help to overcome the major public health problem.38,39 However, it is essential to know the current prevalence and factors associated with childhood and adolescent overweight and obesity. Hence, improving the research evidence by employing a more specific and rigorous systematic approach with the recently published articles in this domain is critical. Hence, the present systematic review was performed to measure the prevalence and identify determinants of childhood and adolescent obesity and overweight in the MENA countries.
Materials and Methods
PRISMA 2020 Statement
We performed this systematic review in compliance with the guidelines of the Preferred Reporting Items for Systematic Review and Meta-Analysis (PRISMA) 2020 Statement.40
Eligibility Criteria
We included observational cross-sectional studies for the present systematic review. The PICO question was following population (P) included children aged between 1 and 19 years, intervention (I) was not applicable, comparison (C) was also not applicable, and the outcome (O) was the prevalence of childhood overweight and obesity. We applied specific criteria for inclusion and exclusion for all PICO components. This helped us to narrow the search strategies. Observational studies like case reports and case series, editorial articles, letter to editors, and narrative, scoping, and systematic reviews were excluded. Furthermore, we included the only published studies of English of the past five years from the countries of this region.
Databases and Search Strategy
PubMed, Saudi Digital Library, Google Scholar, and Web of Science databases were utilized to find the articles appropriate to the study objectives. We included observational studies that were published between January 01, 2018, and onwards. Only research studies that were published in the English language were included. Keywords used in combination with Boolean operators (“AND” and “OR”) were the following: “childhood obesity”, “overweight”, “children”, “prevalence”, and “Middle East”. The bibliography details of the relevant full-text research studies were also reviewed to find further pertinent studies. During the article selection process for the present systematic review, two independent investigators initially evaluated each research’s eligibility based on the inclusion and exclusion criteria mentioned above. In cases where there was disagreement or contradiction between the two researchers regarding the eligibility of an article, a third researcher was consulted to evaluate the article and reach a consensus decision.
Data Collection and Collation
From relevant full-text articles, the following pieces of information were gathered and organized in a Word file in table format: first author’s name, year of publication, country, study design, sample size, age, overweight and obesity diagnostic criteria, and frequency of overweight and obesity.
Quality Assessment
The quality of eligible studies was evaluated using the Newcastle-Ottawa Scale for cross-sectional research. The Newcastle-Ottawa Scale was originally prepared by the Universities of Newcastle, Australia, and Ottawa, Canada, and numerous studies used the scale for their relevant systematic review and metanalysis.41–43 The scale was adopted and revised for this systematic review. Newcastle-Ottawa Scale is a tool that helps evaluate the methodology of research studies so that informed judgments can be made about their accuracy and consistency. Each section in the Newcastle-Ottawa Scale is usually given a score of either one or two on the basis of methodological quality, ie, the higher the score, the better the methodological quality. For the evaluation of cross-sectional studies, we regarded a score of 1 to 3 as a sign of high, 4 to 5 as moderate, and 6 or above as a low risk of bias.
Results
Study Review and Selection
In this systematic review, 7283 articles were identified in the initial search. After conducting initial filtering of articles for titles and abstracts, 7192 articles were omitted, with 91 studies remained for the full-text review. The reasons for excluding the studies in the initial stages were due to duplicate records, irrelevance, non-availability of full text, and other than English publications. Finally, 21 articles were eligible for inclusion in the systematic review. The main reasons for the exclusion of 70 full-text articles were as follows: review articles, articles not from the Middle East and North Africa, age >19 years, and prevalence of childhood overweight and obesity could not be calculated. Figure 1 demonstrates the flow of study selection and inclusion.
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Figure 1 PRISMA Flowchart – Study selection process. |
Attributes of Included Studies
Twenty-one articles incorporated in the systematic review were published between the years 2018 and 2023. Four studies originated from Jordan,44–47 four from Saudi Arabia,48–51 two each from Kuwait,52,53 Palestine,54,55 UAE,56,57 Algeria,58,59 and Qatar,60,61 and one each published from Sudan,62 Egypt,63 and Iran.64 Studies enrolled children between 1 and 19 years old. All studies were cross-sectional study design. Varied approaches were used to diagnose childhood overweight and obesity, which included the International Obesity Taskforce (IOTF),50,52,54,58,59 Centre for Disease Control (CDC),46,47,55,56,63 WHO,44,45,49–51,53,57,60,61,64 and Saudi Growth Pattern Curves.48 A study by Al-Hazza et al used three approaches (IOTF, WHO, and Saudi Growth Pattern Curves) to compare and contrast the prevalence of childhood obesity and overweight (Table 1).
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Table 1 The Attributes of the Incorporated Articles in the Review (n=21) |
Risk of Bias Assessment
On the risk of bias evaluation of included articles with the Newcastle-Ottawa Scale, all articles had a low risk of bias (score of 7). (Please find more information in the Supplementary Table -Appendix A).
Prevalence of Childhood Overweight and Obesity
This section presents a summary of some of the crucial studies reviewed in this study. According to the present systematic review findings, the prevalence of overweight and obesity was the highest (49.4%) in the Kuwaiti adolescent population, as reported by Al-Haifi et al in 2022.52 Next to Kuwait, overweight (20.9%) and obesity (21.4%) were highly prevalent among Qatari samples. Using CDC criteria, an almost similar proportion of overweight (17.6% and 17.3%) prevalence was reported by Fraiwan et al46 and Zayed et al47 among Jordanian children and adolescents. However, the obesity prevalence was 7.8% and 15.7%, respectively. A study by Al-Hazzaa et al in 2022 among Saudi children used three different criteria (IOTF, WHO, and Saudi Growth Pattern Curves) to compare the identified prevalence of overweight and obesity. In their study, overweight prevalence explored by IOTF, WHO, and Saudi Growth Chart patterns were 18.4%, 19.1%, and 22.4%, respectively.50 The lowest prevalence of overweight and obesity was observed in Sudan,62 followed by Iran.64
Risk Factors of Childhood Overweight and Obesity
The identified determinants for overweight and obesity are summarized in this section. Al-Domi et al 2019 [sedentary activities (RR= 2.0, 95% CI = 1.1–3.6, p=0.02) and eating meal and snacks from school canteen (RR= 1.8),44 Okour et al 2019 [maternal education (p=0.004), maternal occupation (p=0.011), monthly family income (p=0.013), family history of obesity (p=0.001), and eating habits (p=0.001)],45 Al-Lahham et al 2019 [waist circumference with overweight (OR=1.38, 95% CI: 1.27–1.50), waist circumference with obesity (OR=1.79, 95% CI: 1.59–2.02), and living place with obesity (OR=3.58, 95% CI: 1.09–11.81)],55 Al-Haifi et al 2022 [gender (p<0.05)],52 Al-Thani et al 2022 [boys (OR = 1.50, 95% CI = 1.46–1.53, p<0.05) and year of education (OR=1.41, 95% CI= 1.37–1.44, p<0.05),61 Abduelkarem et al 2020 [boys (OR=2.30, 95% CI:1.17–4.50), family history of obesity (OR=2.98, 95% CI:1.09–8.11), and high energy consumption from carbohydrates (OR=1.96, 95% CI: 1.06–3.16)]56 and Ghobadi et al 2018 [≥2 hours of time spent on watching television on weekend days with overweight (OR=2.44, 95% CI: 1.03–5.70) and always eating breakfast while watching television with obesity (OR=2.70, 95% CI:1.02–7.60)].64
Discussion
To the best of our literature search, this is the first study that has assessed the epidemiological dynamics and determinants of childhood overweight and obesity, specifically for the MENA countries, in the past five years. Reportedly, a significant increase in childhood overweight and obesity has been witnessed in the Middle East, particularly in Saudi Arabia,48–50 Kuwait,52,53 and Qatar.55,60 In this systematic review, the prevalence of childhood and adolescent overweight and obesity was the highest (49.4%) in the Kuwaiti population, followed by Qatar.
Our systematic review uncovered a complex spectrum of risk factors leading to the prevalence of obesity and overweight. The detected risks present a diverse array encompassing socio-demographic, lifestyle, and behavioral factors. Among these, age emerged as a significant factor, corroborating existing literature that highlights its pivotal role in susceptibility to weight-related issues.65 Additionally, our findings underscored gender disparities, with male gender surfacing as a notable risk marker in earlier research as well.66 The influence of lifestyle choices, such as regular breakfast consumption and physical activity, was prominent in its impact on weight.67 Intriguingly, the context in which meals were consumed, particularly breakfast while watching television, demonstrated a potential correlation with obesity, signifying the potential implications of mindful eating habits.64 Conversely, a recent meta-analysis by Wang et al 2023 reported that skipping breakfast was associated with overweight and obesity in children and adolescents.68
Education levels within the family unit, encompassing both parents, were established as influential factors, shedding light on the interaction between socioeconomic status and metabolic health outcomes. Furthermore, dietary patterns, including the consumption of fried foods and low-quality diets, were consistently associated with increased risk. The intricate interconnections between family dynamics and obesity were elucidated through aspects like family size, parental obesity, and family history of obesity. Notably, the study revealed the impact of environmental factors, such as living place and income level, on weight status.55,64,67,69–71
The frequency of childhood overweight and obesity across various populations of Middle East countries revealed noteworthy patterns. Among the data analyzed, the prevalence of overweight ranged from 6.2% in Sudan62 to 24% in Kuwait.52 Some countries demonstrated higher rates of overweight but lower rates of obesity, while others displayed lower overweight rates but higher obesity prevalence. Saudi Arabia reported significantly higher rates of both childhood overweight and obesity, and this is an increasing trend in accordance with the earlier studies.69,72–74 Overall, an interesting trend appeared, demonstrating sizable variability in both overweight and obesity rates across the studied countries in the MENA countries. One plausible reason for differences in prevalence among these countries could be the utilization of diverse diagnostic criteria. Nevertheless, this systematic review underscores the diverse and dynamic nature of overweight and obesity prevalence, emphasizing the need for tailored interventions and targeted strategies to address these variations effectively.
Childhood overweight and obesity have not only physical but substantial economic impacts.75 A recently published systematic review and meta-analysis by Ling et al 2023 reported increased length of hospitalization among children with overweight and obesity and expenditures associated with healthcare services outside hospitals, outpatient clinics, medicines, and hospital stay.75 The high prevalence of overweight and obesity among young males and females has also been documented in a systematic review conducted to determine the prevalence and determinants of childhood overweight and obesity in MENA nations.76 Hence, prioritizing the development of strategies to prevent and manage this issue should be a paramount focus on the health agenda of Middle East nations. Further investigations are needed to systematically log epidemiological parameters to understand trends and plan healthcare measures accordingly.
There are a few limitations in this systematic review that need to be considered. Firstly, we only included studies that were observational in nature. Second, we omitted investigations that included children as old as 21 years within the same population. There was significant heterogeneity among the included studies. Furthermore, different criteria were used for the diagnosis of childhood overweight and obesity, such as IOTF, CDC, WHO, and Saudi Growth Pattern Curves, which might be the reason for observed heterogeneity.
Conclusion
The prevalence of childhood overweight and obesity in the MENA countries is alarming and thus necessitates a multifaceted approach. Most of the recognized risk factors are modifiable, and if proper attention is given, the burden of long-term clinical complications associated with this problem will be significantly reduced. Regular targeted health-awareness campaigns aimed at the improvement of physical activities, nutrition intake quality, and reduction of screen time among children and adolescents in this region must be conducted. In addition, cooperation among the countries of the MENA region in the aspect of evidence, best practice sharing, and coordinated efforts should further contribute to the fight against childhood obesity. Lastly, continued evaluation with exploratory prospective studies is needed in the region to understand its epidemiology in totality, as there is limited data about its prevalence and risk factors in this region.
Acknowledgments
Authors wish to thank Ayed Al-Qahtani and Sultan Al-Aqidi for their support in conceptualization.
Funding
“This work was funded by the Deanship of Graduate Studies and Scientific Research at Jouf University under grant No. (DGSSR-2023-01-02145)”.
Disclosure
The authors report no conflicts of interest in this work.
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