HLTH 4320 Week 5 Sugary Drinks Evidence Appraisal Example

Course	HLTH 4320 Nutrition Across the Lifespan
Week	Week 5
Paper type	Evidence appraisal
Length	About 1,030 words, 6 pages
Format	APA 7 student paper
School	Walden University
Program	BS in Public Health
Updated	October 2026

Free sample paper for HLTH 4320 Week 5

Sugar-Sweetened Beverages and Adolescent Weight: An Appraisal That Keeps the Disagreement Visible, From a Trial Whose Effect Faded to Reviews Whose Conclusions Tracked Their Funding

Student Name

Walden University

HLTH 4320: Nutrition Across the Lifespan

Instructor Name

Month Day, Year

What this page is doingThe title names the question, the age group and the two places where the evidence disagrees, signaling that the appraisal will report the disagreement rather than resolve it by omission.

Sugar-Sweetened Beverages and Adolescent Weight: An Appraisal That Keeps the Disagreement Visible, From a Trial Whose Effect Faded to Reviews Whose Conclusions Tracked Their Funding

The Question

Do sugar-sweetened beverages, such as regular soda, sweetened fruit drinks and sports drinks, cause weight gain in adolescents? The question matters because adolescents are among the heaviest consumers of these drinks and because reducing them is one of the most common recommendations made to teenagers and their families. The evidence, however, does not line up neatly. This appraisal sets out the main types of evidence, shows where they agree and where they diverge and explains what a careful reader can and cannot conclude.

Evidence From Cohort Studies

Cohort studies follow children and adolescents over time and relate how much they drink to how their weight changes. A meta-analysis of 15 cohort studies in children, involving 25,745 participants, found that each additional daily serving of sugar-sweetened beverages was associated with an increase in body mass index of about 0.05 to 0.06 units over a year (Malik et al., 2013). The association is consistent but small for a single serving. Cohort studies can show that heavier drinkers gain more, but they cannot rule out that heavy drinkers differ in other ways, such as overall diet, activity or family income, that also affect weight.

Evidence From Trials

Trials are the stronger test, and here the evidence becomes more complicated.

The clearest trial was in younger children, not adolescents. In the Netherlands, 641 mostly normal-weight children aged about 5 to 11 were randomly assigned to receive either a sugar-sweetened or a sugar-free drink in identical cans every day for 18 months, so that neither the children nor the researchers knew which was which. Children receiving the sugar-free drink gained less weight, 6.35 kg compared with 7.37 kg, and less body fat (de Ruyter et al., 2012). Because the drinks were masked, the difference cannot be explained by children changing other behaviors.

The main adolescent trial gave a less tidy answer. In Boston, 224 overweight and obese adolescents who regularly drank sugar-sweetened beverages were randomly assigned to a one-year program that delivered non-caloric drinks to their homes and encouraged them to stop drinking sweetened ones, or to a control group, then followed for a second year without the program (Ebbeling et al., 2012). At one year, the program group's BMI had increased 0.57 units less than the control group's, and their weight 1.9 kg less, both statistically significant. At two years, the primary outcome, the difference had shrunk to 0.3 BMI units and was no longer significant. The effect also differed by ethnic group, with a larger effect among Hispanic participants.

How should the adolescent trial be read? It shows that removing these drinks reduced weight gain while the intervention lasted, and that the effect faded when the intervention stopped. It does not show that the drinks have no effect; it shows that a one-year program did not produce a lasting change. Pooled across trials in children, reducing sugar-sweetened beverages reduced BMI gain, with stronger effects in trials that substituted drinks directly and among overweight children (Malik et al., 2013).

Evidence About the Evidence

A further layer of disagreement concerns the reviews themselves. An analysis of 17 systematic reviews on sugar-sweetened beverages and weight found that conclusions tracked financial conflicts of interest. Among reviews with no reported conflict, 10 of 12 conclusions found that these drinks could be a risk factor for weight gain. Among reviews disclosing a financial conflict with the food industry, 5 of 6 concluded that the evidence was insufficient to support an association. Reviews with conflicts were five times as likely to reach a conclusion of no positive association (Bes-Rastrollo et al., 2013). The authors noted that they could not rule out other biases among reviews without declared conflicts, and they pointed out that the best large randomized trials supported a direct association.

Where the Evidence Agrees and Where It Does Not

The evidence agrees that these drinks contribute calories that are not fully offset by eating less, and that removing them reduces weight gain at least while removal continues. It disagrees, or is uncertain, about how large and how lasting the effect is in adolescents specifically, and some of the published disagreement reflects the interests of those reviewing it.

Table 1

What Each Type of Evidence Supports

Evidence	Finding	What it can and cannot show \|
Cohort studies in children	Small BMI increase per daily serving	Consistent association; cannot exclude confounding \|
Masked trial, ages 4 to 11	Less weight gain with sugar-free drinks over 18 months	Causal effect in younger, normal-weight children; not adolescents \|
Adolescent trial	Effect at 1 year, faded by 2 years	Effect while intervention lasts; durability uncertain \|
Review of reviews	Conclusions differ with funding	Disagreement partly reflects who wrote the reviews \|

The table keeps each finding attached to its population and design, which is where most overstatements in this topic begin.

What a Careful Conclusion Says

A careful conclusion for adolescents would say: reducing sugar-sweetened beverages is likely to slow weight gain, the strongest trial evidence comes from younger children, the main adolescent trial showed an effect that faded after the program ended and reviews concluding that there is no effect were disproportionately funded by industry. A conclusion that left out the faded effect would overstate the adolescent evidence; one that relied on the conflicted reviews would understate the trial evidence.

A Note on Reading the Adolescent Trial

One further detail of the adolescent trial deserves attention. Its participants were already overweight or obese and were regular drinkers of sugar-sweetened beverages, so its results describe a high-risk group, not all teenagers. The trial also delivered free non-caloric drinks to homes, an intervention few families would receive outside a study.

Conclusion

The evidence on sugar-sweetened beverages and adolescent weight is consistent in direction and uncertain in size and durability. Cohort studies show a small association, a masked trial in younger children shows a causal effect and the adolescent trial shows an effect that held at one year but not at two. Reviews disagree partly along lines of funding. Keeping all four in view is less tidy than choosing one, and more accurate.

References

Bes-Rastrollo, M., Schulze, M. B., Ruiz-Canela, M., & Martinez-Gonzalez, M. A. (2013). Financial conflicts of interest and reporting bias regarding the association between sugar-sweetened beverages and weight gain: A systematic review of systematic reviews. PLoS Medicine, 10(12), Article e1001578. https://doi.org/10.1371/journal.pmed.1001578

de Ruyter, J. C., Olthof, M. R., Seidell, J. C., & Katan, M. B. (2012). A trial of sugar-free or sugar-sweetened beverages and body weight in children. New England Journal of Medicine, 367(15), 1397-1406. https://doi.org/10.1056/NEJMoa1203034

Ebbeling, C. B., Feldman, H. A., Chomitz, V. R., Antonelli, T. A., Gortmaker, S. L., Osganian, S. K., & Ludwig, D. S. (2012). A randomized trial of sugar-sweetened beverages and adolescent body weight. New England Journal of Medicine, 367(15), 1407-1416. https://doi.org/10.1056/NEJMoa1203388

Malik, V. S., Pan, A., Willett, W. C., & Hu, F. B. (2013). Sugar-sweetened beverages and weight gain in children and adults: A systematic review and meta-analysis. The American Journal of Clinical Nutrition, 98(4), 1084-1102. https://doi.org/10.3945/ajcn.113.058362

HLTH 4320 Week 5 instructions, in plain terms

The evidence appraisal asks you to take a nutrition question and judge the research behind it, not just summarize studies. State the question precisely, including the population, because a finding in younger children may not hold for teenagers. Gather evidence of more than one design, such as cohort studies, randomized trials and systematic reviews. For each, report what was done, who took part and what was found, with numbers. Then judge the strength of each source: can it show cause, how long did it last and who funded or wrote it. Where sources disagree, say so plainly and explain why. Most prompts expect four to six scholarly sources in an APA paper of about five pages. End with a conclusion that matches the strength of the evidence, neither overstated nor dismissive.

How the HLTH 4320 Week 5 example is put together

The appraisal starts by stating the question and why adolescents matter. Cohort evidence comes first, using the Malik meta-analysis and its finding of a small BMI rise per daily serving. Trials follow in two parts: the Dutch trial in children aged about 5 to 11, masked with identical cans, and the Boston adolescent trial, where home delivery of non-caloric drinks reduced BMI gain at one year but not at two. A paragraph explains how to read that fading effect. A section on evidence about the evidence reports that 10 of 12 reviews without a stated conflict found an association, set against the conflicted reviews. Table 1 pairs every design with the inference it licenses and the one it does not. Two closing sections write a careful conclusion and note that the adolescent participants were already overweight regular drinkers.

Reading the HLTH 4320 Week 5 rubric

Appraisal rubrics give the most weight to analysis of evidence, which means judging each study rather than describing it. Faculty reward appraisals that separate association from causation and that notice when the strongest trial was done in a different age group. Accurate reporting of study size, duration and outcome is a basic expectation; a missing population is treated as an error. A higher score usually requires dealing honestly with disagreement, explaining it rather than picking a side. Discussion of funding or bias in the literature counts in the critical-thinking row. The conclusion is graded on whether it fits the evidence presented. Organization and APA format form the last part of the grade, with four or more peer-reviewed sources, each reference entry matching a citation in the text.

HLTH 4320 Week 5 help from the desk

Avoid concluding that the drinks have no effect because the adolescent trial faded; the trial shows the effect lasted only while the program ran. The reverse mistake is presenting the cohort association as proof, which ignores confounding. Students also apply the Dutch result to teenagers without noting that the children were younger and mostly normal weight. Read each study's abstract and methods yourself rather than relying on a review's description. Put the populations in your table. When sources disagree, write a sentence that names the disagreement directly. Check that your funding discussion reports what Bes-Rastrollo and colleagues found without implying fraud. For a different question, such as fruit juice in toddlers or low-calorie sweeteners in teens, a custom appraisal can be ordered with your instructor's source rules.

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HLTH 4320 Week 5 questions, answered

Where can I find a free HLTH 4320 Week 5 sample paper?

The full Week 5 appraisal on sugar-sweetened beverages and adolescent weight, with a table of evidence types and four APA references to real studies, appears on this page at no cost.

Which studies does the HLTH 4320 Week 5 appraisal use?

A cohort meta-analysis by Malik and colleagues, the Dutch trial by de Ruyter and colleagues, the Boston adolescent trial by Ebbeling and colleagues and a review of reviews by Bes-Rastrollo and colleagues.

Why did the adolescent trial's effect fade?

The program delivered non-caloric drinks for one year; BMI gain was lower at one year but the difference was no longer significant a year after delivery stopped.

Can an appraisal conclude that the evidence is mixed?

Yes, if it explains the mix. The sample concludes that the direction is consistent but the size and durability of the effect in adolescents remain uncertain.

How does funding affect reviews on this topic?

In the review of 17 systematic reviews, those reporting financial ties to the food industry were far less likely to find an association with weight gain than those without ties.