Systematic reviews and meta-analysis in nutrition research

Kelley, George A.; Kelley, Kristi S.

doi:10.1017/s0007114519002241

Cited by 26 publications

(24 citation statements)

References 120 publications

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“…This systematic review followed the protocol of Preferred Reporting Items for Systematic Reviews and Meta-Analyses (45) and the methodology suggested by the Academy of Nutrition and Dietetics for the evidence analysis process in 2016 (46) is shown in Table 1 (44) .…”

Section: Methodsmentioning

confidence: 99%

“…However, to our knowledge, no systematic review to date has compared the relative validity of FFQ in relation with reference methods in children and adolescents. Systematic reviews with meta-analysis have the strength of increased statistical power for primary outcomes, the ability to reach agreement when original studies yield conflicting findings, improving effect size estimates and answering questions not addressed in original trials (44) . Therefore, the aim of the present study was to evaluate the relative validity of FFQ in assessing the dietary intake of children and adolescents, comparing the questionnaire with other forms of evaluating food consumption through a systematic review, considering energy, macronutrients (carbohydrates (CHO), protein, fat and fibre), certain micronutrients (Ca, Fe, Zn, vitamin A and vitamin C) and some food item (meat, milk, fruits and vegetables).…”

mentioning

confidence: 99%

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Relative validity of FFQ to assess food items, energy, macronutrient and micronutrient intake in children and adolescents: a systematic review with meta-analysis

et al. 2020

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Food Frequency Questionnaires (FFQs) are one of the most widely used tools of research into nutritional epidemiology, and many studies have been conducted in several countries using this dietary assessment method. This study aimed to evaluate the relative validity of FFQs, in comparison with other methods, in assessing dietary intake of children and adolescents, through a systematic review. Four electronic databases (Embase, PubMed, Scopus and Web of Science) found 67 articles, which met the inclusion criteria (healthy children and adolescents from 3 to 18 years; journal articles written in English, Spanish and Portuguese between 1988 and March 2019; results showing the comparison between the FFQ with other methods of assessment of dietary intake). The articles were analyzed by two independent reviewers. A meta-analysis was conducted using correlation coefficients as estimate effects between the FFQ and the reference standard method. Subgroup analysis and meta-regression were performed to identify the probable source of heterogeneity. In 55 of the 67 studies, a single dietary assessment method was used to evaluate the FFQ; 9 combined the two methods and 3 used three reference methods. The most widely used reference method was the 24-Hour Recall, followed by the Food Record. The overall relative validity of the FFQ to estimate energy, macronutrient, certain micronutrient, and certain food item intakes in children and adolescents may be considered weak. The study protocol was registered in PROSPERO under number CRD42016038706.

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Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

Relative validity of FFQ to assess food items, energy, macronutrient and micronutrient intake in children and adolescents: a systematic review with meta-analysis

et al. 2020

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“…The protocol for this review adheres to previously published guidelines [ 43 ] and includes all items described in the checklist of Preferred Reporting Items for Systematic Review and Meta-Analysis Protocols (PRISMA-P) [ 44 ]. The completed checklist is available in Supplementary File 1 , and the protocol for this review was pre-registered in the Open Science Framework Registry ( https://osf.io/6f8dz ).…”

Section: Methodsmentioning

confidence: 99%

The influence of acute exercise on bone biomarkers: protocol for a systematic review with meta-analysis

et al. 2020

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Background Bone is a plastic tissue that is responsive to its physical environment. As a result, exercise interventions represent a potential means to influence the bone. However, little is currently known about how various exercise and participant characteristics interact to influence bone metabolism. Acute, controlled, interventions provide an in vivo model through which the acute bone response to exercise can be investigated, typically by monitoring circulating bone biomarkers. Currently, substantial heterogeneity in factors such as study design, quality, exercise, and participant characteristics render it difficult to synthesize and evaluate the available evidence. Using a systematic review and meta-analytic approach, the aim of this investigation is to quantify the effect of an acute exercise bout on circulating bone biomarkers as well as examine the potential factors that may moderate this response, e.g., variation in participant, exercise, and sampling characteristics. Methods This protocol was designed in accordance with the PRISMA-P guidelines. Seven databases (MEDLINE, Embase, Sport Discus, Cochrane CENTRAL, PEDro, LILACS, and Ibec) will be systematically searched and supplemented by a secondary screening of the reference lists of all included articles. The PICOS (Population, Intervention, Comparator, Outcomes and Study Design) approach was used to guide the determination of the eligibility criteria. Participants of any age, sex, training, or health status will be considered for inclusion. We will select studies that have measured the bone biomarker response before and after an acute exercise session. All biomarkers considered to represent the bone metabolism will be considered for inclusion, and sensitivity analyses will be conducted using reference biomarkers for the measurement of bone resorption and formation (namely β-CTX-1 and P1NP). Multi-level, meta-regression models within a Bayesian framework will be used to explore the main effect of acute exercise on bone biomarkers as well as potential moderating factors. The risk of bias for each individual study will be evaluated using a modified version of the Downs and Black checklist while certainty in resultant outcomes will be assessed using the Grading of Recommendations Assessment, Development and Evaluation (GRADE) approach. Discussion A better understanding of the bone metabolic response to an acute bout of exercise has the potential to advance our understanding of the mechanisms through which this stimulus impacts bone metabolism, including factors that may moderate this response. Additionally, we will identify current gaps in the evidence base and provide recommendations to inform future research. Systematic review registration This protocol was prospectively registered in the Open Science Framework Registry (https://osf.io/6f8dz)

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“…The degree of heterogeneity of the studies was analyzed through Cochran's Q test [35], and the degree of consistency between studies was calculated through the I 2 test, which was interpreted as low (≤ 25%), moderate (26-74%), and high (≥ 75%) [36]. The effect of the studies with small samples was determined by the Doi plot [33] and the Luis Furuya-Kanamori (LFK) index [33] to detect asymmetry as Egger's regression loses statistical power in small samples [37]. The LFK values outside the interval -1 and 1 were considered consistent with asymmetry (i.e., publication bias) [38].…”

Section: Meta-biasesmentioning

confidence: 99%

A Meta-Analysis of the Effect of Small-Sided Games on the Repeated Sprint Ability in Soccer

Morera-Siércovich

Moncada-Jiménez

2020

Int. J. Phys. Educ. Fit. Sports

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To determine the effect of small-sided games (SSG) on the repeated sprint ability (RSA) in male soccer players. A meta-analysis was conducted in which studies were selected from the electronic databases Medline, SPORTDiscus, Google Scholar, and PubMed. Results: Six studies were included and 44 effect sizes (ES) were computed from 116 men (age = 18.0 ± 2.8 yr., height = 175.8 ± 3.3 cm, weight = 68.6 ± 5.6 kg, body mass index [BMI] = 22.3 ± 1.1 kgm2, VO2max = 56.9 ± 2.1 mlkg-1min-1). The SSG training improved the overall RSA performance (ES = -.54, 95%CI = -.89, -.20, p < .05), reduced RSA total time (ES = -.41, 95%CI = -.81, -.01, p < .05), and fatigue index (ES = -.83, 95%CI = -1.65, -.02, p < 0.05). Moderator analysis showed that the fatigue index is impaired when several sessions/week are performed (β = .69, 95%CI = .29, 1.10, R2 = 82.9, p = .001) and is enhanced when the duration of the intervention is extended over several weeks (β = -.25, 95%CI = -.47, -.03, R2 = 56.6, p = .05). The methodological use of SSG enhances the capacity of repeated sprints, while technical and tactical elements are worked concomitantly.

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Systematic reviews and meta-analysis in nutrition research

Cited by 26 publications

References 120 publications

Relative validity of FFQ to assess food items, energy, macronutrient and micronutrient intake in children and adolescents: a systematic review with meta-analysis

Relative validity of FFQ to assess food items, energy, macronutrient and micronutrient intake in children and adolescents: a systematic review with meta-analysis

The influence of acute exercise on bone biomarkers: protocol for a systematic review with meta-analysis

A Meta-Analysis of the Effect of Small-Sided Games on the Repeated Sprint Ability in Soccer

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