Peer Review History
| Original SubmissionNovember 9, 2020 |
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PONE-D-20-35214 Age, sex and sociodemographic differences are associated with Brazilian dietary pattern: National Health Survey PLOS ONE Dear Dr. dos Santos, Thank you for submitting your manuscript to PLOS ONE. After careful consideration, we feel that it has merit but does not fully meet PLOS ONE’s publication criteria as it currently stands. Therefore, we invite you to submit a revised version of the manuscript that addresses the points raised during the review process. Please submit your revised manuscript by January, 18th, 2021. If you will need more time than this to complete your revisions, please reply to this message or contact the journal office at plosone@plos.org. When you're ready to submit your revision, log on to https://www.editorialmanager.com/pone/ and select the 'Submissions Needing Revision' folder to locate your manuscript file. Please include the following items when submitting your revised manuscript:
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[Note: HTML markup is below. Please do not edit.] Reviewers' comments: Reviewer's Responses to Questions Comments to the Author 1. Is the manuscript technically sound, and do the data support the conclusions? The manuscript must describe a technically sound piece of scientific research with data that supports the conclusions. Experiments must have been conducted rigorously, with appropriate controls, replication, and sample sizes. The conclusions must be drawn appropriately based on the data presented. Reviewer #1: Partly Reviewer #2: Yes ********** 2. Has the statistical analysis been performed appropriately and rigorously? Reviewer #1: Yes Reviewer #2: Yes ********** 3. Have the authors made all data underlying the findings in their manuscript fully available? The PLOS Data policy requires authors to make all data underlying the findings described in their manuscript fully available without restriction, with rare exception (please refer to the Data Availability Statement in the manuscript PDF file). The data should be provided as part of the manuscript or its supporting information, or deposited to a public repository. For example, in addition to summary statistics, the data points behind means, medians and variance measures should be available. If there are restrictions on publicly sharing data—e.g. participant privacy or use of data from a third party—those must be specified. Reviewer #1: Yes Reviewer #2: Yes ********** 4. Is the manuscript presented in an intelligible fashion and written in standard English? PLOS ONE does not copyedit accepted manuscripts, so the language in submitted articles must be clear, correct, and unambiguous. Any typographical or grammatical errors should be corrected at revision, so please note any specific errors here. Reviewer #1: Yes Reviewer #2: Yes ********** 5. Review Comments to the Author Please use the space provided to explain your answers to the questions above. You may also include additional comments for the author, including concerns about dual publication, research ethics, or publication ethics. (Please upload your review as an attachment if it exceeds 20,000 characters) Reviewer #1: The manuscript addresses a topic of potential interest of PLOS ONE readers. The objective was 'to identify Brazilian dietary patterns and their associations with sociodemographic characteristics'. The authors conclude ‘their results suggest that strategies to promote healthy eating habits should focus on the younger population'. The rationale/concept of the manuscript is interesting. The article provides a unique opportunity to explore the dietary patterns of the Brazilian population. However, I suggest a revision to clarify some basic concepts related to the analysis. I have following major and minor comments: Major comments 1. Components was extracted using the Factor Analysis, not Principal Components Analysis instead. They are similar but not quite the same. Could you clarify this point to avoid any confusion? 2. These patterns represent a hypothetical composition, such as ‘healthy diets’ or ‘unhealthy'. Those concepts (health vs unhealthy) are not new and does not reflect the diversity of the ‘real diet’. Furthermore, the idea of the protein pattern is a new approach, the article is well constructed with an expressive Brazilian sample that will be helpful for future studies. 3. I suggest Cattell’s scree test, to visualize the proportion of variance explained by each component/factor (eigenvalues) 4. There are seemingly contradictory pieces of information such: (lines 299-306). 'People with black and brown skin colour and indigenous heritage presented lower adherence to the healthy and western patterns (...) greater adherence to the protein pattern'; 'Indigenous, black, and brown people generally have less access to regular education, have lower incomes and perform low-paid activities. These factors also affect their food choices'. However, the protein pattern is composed of beans, red meat, fish, and chicken. Can people from low-income levels buy protein patterns? Lines 318-320 contradicted the information above, about skin color/income and diet intake: 'positive association between the highest educational level and the western pattern, which could be explained by purchasing power'. The discussion about income/skin color/education was a bit confusing for me. Minor comments: 1. lines127. ‘The Bartlett test and Kaiser–Mayer–Olkin (KMO) coefficient were applied to verify the method applicability’... The KMO is relevant in the context of FA, but not PCA, which uses the "Kaiser rule". 2. lines 128-129. 'KMO≥0.6 was considered appropriate in the partial correlation between diet variables’. Values of 0.6 are considered not best choices, would be at least >0.7 to be considerable as intermediate values according to Kaiser (1975) 3. line 180. ‘The highest p-value for the Cronbach Alpha test was 0.55’ Cronbach Alpha test is lower than references recommendations, indicates as limit cut above 0.70 as acceptable, however ≥0.80 would better. (Griethuijsen et al., 2014, Cortina, J. M., 1993). 4. line 180-181. ‘Milk was not included in any of the dietary patterns due to a low factorial load’. I believe that information must be explored in more depth. 5. line 230. 'which explained 40% of the diet variability'. Is this percentage considered enough for the total variance explanation? 6. line 265. ‘Several factors could explain healthier eating habits in older individuals.’ There is only one reference to explain the whole background. The authors should rewrite with more information about these hypotheses. Reviewer #2: This study examined the association between sociodemographic characteristics and the main Brazilian dietary patterns. This manuscript addresses an interesting nutrition topic using data of the Brazilian population. The study has its strengths and, overall, the article is well written, but I have some major comments. 1. Title: Aren't age and sex sociodemographic characteristics? The use of the term "sociodemographic characteristics" is not enough in the title? 2. Title: “Brazilian dietary pattern” or “Brazilian dietary patterns”? 3. Introduction: There are many sentences in the first paragraph of "Introduction" text without references. This needs to be revised. Example (Page 2-line 47): “Changes in dietary patterns associated with government initiatives have contributed to reducing disease prevalence related to nutritional deficiencies.” 4. Design and Study Population: Is this a cross-sectional study? Why is this not described in the study design? 5. Variables (Page 4-line 93): “The selected variables were age, sex, colour/race, marital status, education, area of residence, macro-region, socioeconomic status, physical activity, tobacco use, alcohol intake, self-related health status and multimorbidity.” This section of the manuscript describes behavioral, health and multimorbidity variables. However, only sociodemographic variables were explored in the study. What is the main reason for adopting this procedure? Exploring behavioral, health and multimorbidity characteristics with dietary patterns would make the article more robust and interesting. 6. Statistical Analysis: The principal component analysis (PCA) appears to have been well conducted. The food consumption questionnaire was composed of 22 food items. Is this number of food items considered adequate? This could be highlighted or otherwise weighted among the study's limitations. 7. Statistical Analysis (Page 5-line 138): “Robust Poisson regression models allow correction for overestimation of associations when outcomes are not rare (>10% prevalence)(28).” I believe that there is a better reference for this information, considering cross-sectional studies. [Barros AJ, Hirakata VN. Alternatives for logistic regression in cross-sectional studies: an empirical comparison of models that directly estimate the prevalence ratio. BMC Med Res Methodol. 2003;3(1):21. DOI: 10.1186/1471-2288-3-21.] 8. Statistical Analysis (Page 5-line 141): “Associations were presented as Incidence Rate Ratios (IRR) with 95% confidence intervals (95% CI).” Is this the adequate measure of effect for the data under analysis? Is there any reason for not using the Prevalence Ratio? 9. Statistical Analysis: The description of the multivariate analysis model is confusing and needs to be revised. For example: Have demographic variables been adjusted to each other? Were behavioral, health and morbidity variables considered only as possible confounders? Why these variables were not explored as independent variables? If these characteristics are not explored as independent variables, I believe that it would be more appropriate to remove them from the analysis of the present study. 10. Results (Table 1): The data interpretation using the estimated sample size becomes confused. Is this form of presentation necessary? 11. Results (Page 10-line 194): “Table 3 shows the associations between the first quartile (Q1 - reference quartile) and the last quartile (Q4) of each pattern.” This procedure was not described and justified in the Methods section of the manuscript. Why was not the first quartile (Q1) compared to the sum of the remaining three (Q2 + Q3 + Q4)? 12. Results (Page 10-line 198): “In stratified analysis by macro-region, age showed a dose-response effect.” This sentence is not clear. Was this finding only for the regions and not for the national data (Brazil)? 13. Results: Table 3 is too long. I believe that this should be reduced. As most of the findings are similar across regions, Table 3 should only include national results (Brazil) and possible differences between regions should be described only in the text of the results. 14. Results: Table 3. The comparison groups (categories) of dietary patterns should be indicated in the title or heading of the Table. 15. Results: Table 3: The use of the following terms should be reviewed: “Crude” or Unadjusted? -- “(CI 95%)” or 95%CI? -- “<0.005” or <0.001? 16. Results: Table 3 (footnote): What mean "mutually adjusted models"? 17. Results: The ‘Results section’ should be thoroughly revised. Why the findings regarding ‘marital status’ and ‘skin color’ were not highlighted in the text, for example? 18. Discussion: First paragraph of the Discussion: why the main findings for the associations between sociodemographic factors and dietary patterns were not pointed out in the text? 19. Discussion (page 19-line 252): “The traditional Brazilian pattern is an intermediate pattern characterised by rice and beans consumption. This pattern was not identified in this study because the survey did not evaluate rice consumption.” Considering its regular consumption by the Brazilian population, what was the reason for this food item has not been evaluated? 20. Discussion (page 21-line 303): “Ethnicity is related to social inequalities and income distribution in Brazil and other developing countries.” This sentence needs reference (s). 21. Conclusion: The conclusion (last paragraph of the discussion) could be more explored and expanded. This could contemplate a synthesis of all sociodemographic aspects that showed an association in the study, in addition to age. ********** 6. PLOS authors have the option to publish the peer review history of their article (what does this mean?). If published, this will include your full peer review and any attached files. If you choose “no”, your identity will remain anonymous but your review may still be made public. Do you want your identity to be public for this peer review? For information about this choice, including consent withdrawal, please see our Privacy Policy. Reviewer #1: No Reviewer #2: No [NOTE: If reviewer comments were submitted as an attachment file, they will be attached to this email and accessible via the submission site. Please log into your account, locate the manuscript record, and check for the action link "View Attachments". If this link does not appear, there are no attachment files.] While revising your submission, please upload your figure files to the Preflight Analysis and Conversion Engine (PACE) digital diagnostic tool, https://pacev2.apexcovantage.com/. PACE helps ensure that figures meet PLOS requirements. To use PACE, you must first register as a user. Registration is free. Then, login and navigate to the UPLOAD tab, where you will find detailed instructions on how to use the tool. If you encounter any issues or have any questions when using PACE, please email PLOS at figures@plos.org. Please note that Supporting Information files do not need this step. |
| Revision 1 |
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Health, lifestyle and sociodemographic characteristics are associated with Brazilian dietary patterns: Brazilian National Health Survey PONE-D-20-35214R1 Dear Dr. dos Santos, We’re pleased to inform you that your manuscript has been judged scientifically suitable for publication and will be formally accepted for publication once it meets all outstanding technical requirements. Within one week, you’ll receive an e-mail detailing the required amendments. When these have been addressed, you’ll receive a formal acceptance letter and your manuscript will be scheduled for publication. An invoice for payment will follow shortly after the formal acceptance. To ensure an efficient process, please log into Editorial Manager at http://www.editorialmanager.com/pone/, click the 'Update My Information' link at the top of the page, and double check that your user information is up-to-date. If you have any billing related questions, please contact our Author Billing department directly at authorbilling@plos.org. If your institution or institutions have a press office, please notify them about your upcoming paper to help maximize its impact. If they’ll be preparing press materials, please inform our press team as soon as possible -- no later than 48 hours after receiving the formal acceptance. Your manuscript will remain under strict press embargo until 2 pm Eastern Time on the date of publication. For more information, please contact onepress@plos.org. Kind regards, Michele Drehmer, Ph.D Academic Editor PLOS ONE Additional Editor Comments (optional): I have no further comments. |
| Formally Accepted |
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PONE-D-20-35214R1 Health, lifestyle and sociodemographic characteristics are associated with Brazilian dietary patterns: Brazilian National Health Survey Dear Dr. Monteiro dos Santos: I'm pleased to inform you that your manuscript has been deemed suitable for publication in PLOS ONE. Congratulations! Your manuscript is now with our production department. If your institution or institutions have a press office, please let them know about your upcoming paper now to help maximize its impact. If they'll be preparing press materials, please inform our press team within the next 48 hours. Your manuscript will remain under strict press embargo until 2 pm Eastern Time on the date of publication. For more information please contact onepress@plos.org. If we can help with anything else, please email us at plosone@plos.org. Thank you for submitting your work to PLOS ONE and supporting open access. Kind regards, PLOS ONE Editorial Office Staff on behalf of Dr. Michele Drehmer Academic Editor PLOS ONE |
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