Peer Review History
| Original SubmissionDecember 18, 2025 |
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-->PONE-D-25-63271--> The Healthy Smoker Paradox: Socioeconomic Status as a Fundamental Cause of Reversed Anemia Risk among Yemeni Youth PLOS One Dear Dr. Abdullah, 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 May 08 2026 11:59PM. 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.. 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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Additional Editor Comments: Major revision [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: Yes Reviewer #2: Yes Reviewer #3: Partly ********** -->2. Has the statistical analysis been performed appropriately and rigorously?--> Reviewer #1: I Don't Know Reviewer #2: Yes Reviewer #3: 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.--> 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 Reviewer #3: 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 Reviewer #3: 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: This manuscript presents a novel and theoretically grounded investigation of a “healthy smoker paradox” in a conflict-affected setting, integrating epidemiological analysis with Fundamental Cause Theory. The multi-center design, large sample, and advanced statistical methods strengthen the contribution. Limitations: However, the cross-sectional design limits causal inference, and the interpretation overstates causal conclusions. Residual confounding—particularly from nutritional, infectious, and socioeconomic factors—remains a major concern. The assumption that smoking serves as a proxy for SES is plausible but not fully demonstrated. Additionally, generalizability is limited to university populations. Recommendation: Major revision is recommended, with emphasis on tempering causal claims, clarifying limitations, and strengthening discussion of confounding. Reviewer #2: A Review of the Paper: The Healthy Smoker Paradox: Socioeconomic Status as a Fundamental Cause of Reversed Anemia Risk among Yemeni Youth. Introduction Strengths 1. The introduction captures attention and presents a novel and a thought-provoking paradox. 2. The use of fundamental Cause Theory is a major strength 3. The introduction moves in the normal logical sequence that is, know biological effect of smoking, challenges posed, Yemen’s humanitarian crisis setting and the study rationale and clear hypothesis. Weaknesses 1. The tone is too overstated or too assertive (words like Powerful, compelling, striking, dramatically). PLOS ONE and other journals prefer neutral tone. I recommend you replace a. Powerful and statistically, striking paradox, compelling demonstration with words such as “unexpected association”, “observed reversal” “findings consistent with” “Hypothesis- generating evidence” 2. Reframe Hypothesis, it’s not conclusion. Instead of saying “smoking serves as a proxy for higher SES, it can be stated as “smoking may/might function as a proxy for relative socioeconomic advantage in this context” 3. Kindly add short justification for a. Why university students were selected, b. Why do they remain relevant in conflict setting. Method Strengths 1. It is detailed and comprehensively structured 2. The inclusion of 3 universities increases diversity and power of the paper, which further improves internal credibility compared to a single site study. 3. Laboratory procedures are described in detail which makes the paper stronger. Weaknesses 1. I recommend you to clearly state the exact number of current smokers, former smokers, never-smokers, and which groups were included in each analysis, whether former smokers were excluded, combine, or separately modeled. In the method section you stated primary analysis compares current smokers VS Never smokers BUT in the result section “The cohort included 144 current smokers (24%) and 456 non-smokers (76%), the latter comprising both never-smokers and former smokers.” This means that the analysis appears to compare smokers and all nonsmokers including former smokers This is an issue because, a. Former smokers are biologically and behaviorally different from never smokers, and if they are included can cause exposure, misclassification, reverse causation and residual confounding. 2. The sample size calculation appears to mismatch the analysis. I recommend you revise the sample size calculation using a. Expected anemia prevalence b. Anticipated smokers/nonsmokers’ ratio c. Minimum detectable Odd Ratio (OR) Results Strengths 1. The main results are easily identified 2. Table 1 and 2 gives useful descriptive insights. 3. The mention of E-values, missing data handling and alternative explanations are helpful. Weaknesses 1. The results reflect the smoking classification I have already talked about. 2. Table 3 looks incomplete or oddly selected. Why is only on sleep variable included, kindly add coefficients such as, age, sex, BMI, University, SES. The table looks like you have selected only significant results. If space is limited kindly provide full model for primary outcomes and a supplementary secondary outcome. Discussion Strength 1. This section has a strong interpretation of the main findings, good theoretical grounding, and good connection between findings and context. 2. It considered the effect modification, attempted to address alternative explanations, and has good public health relevance. Weakness 1. The language is sometimes too strong as discussed earlier Conclusion: Strengths 1. The conclusion aligns with the conceptual paper framework, it has clear study findings, good public health relevance 2. It also highlights practical intervention opportunities, and it avoids simplistic interpretation that is it does not justify smoking but rather an indicator of underlying inequality. Weaknesses 1. As discussed earlier, the conclusion appears to use language that is too definitive for a cross-sectional study. Kindly avoid statements like, “This study demonstrates, this confirms, this proves, this establishes” BUT rather use Neutral languages such as, “This study suggests, these findings are consistent with, this study identifies an unexpected association”. 2. In Making policy recommendations, use language that suggest that the study informs priorities rather than dictates policies. Words such as “May inform, may help guide, suggests the need for, support consideration of” may be used. Overall, the paper is well written, interesting and the topic is very catchy. It has a strong conceptual framing, reasonable statistics, clear contribution to literature and important public health relevance. Reviewer #3: This manuscript addresses an interesting and relevant research question and is generally well structured. The sample size is adequate, and the use of multiple statistical approaches is appropriate. The manuscript is overall clear and readable. However, several important issues should be addressed. First, the interpretation of the findings is too strong. As this is a cross-sectional study, it can only show an association and not a causal relationship. Therefore, statements suggesting causation or mediation should be revised and written more cautiously. Second, some important factors were not fully measured, which may affect the results. These include parasitic infections, menstrual blood loss, inflammation, and micronutrient deficiencies. These factors could influence hemoglobin levels and may explain the findings. This limitation should be more clearly acknowledged. Third, the study population consists only of university students, which may introduce selection bias and limit generalizability to the broader population. This should be explicitly discussed. Fourth, smoking status is mainly self-reported, with limited biochemical validation. This may result in misclassification bias, particularly in subgroups where underreporting is possible. This limitation should be included. Fifth, the mediation analysis should be interpreted carefully because the study is cross-sectional and some variables are indirect measures. Therefore, these results should be presented as exploratory. In addition, the term "healthy smoker paradox" may be misunderstood. It should be clearly stated that the findings do not indicate any protective effect of smoking. Minor issues should also be addressed. The data availability statement should be clarified to meet journal requirements. There are minor typographical and formatting errors that should be corrected (e.g., missing spaces after punctuation such as "pattern.The" and "institutions.Written", and spacing issues like "80%power"). References 19 and 20 appear to be duplicated and are cited together in the text despite referring to the same source; this should be corrected. There is some redundancy between Table 1 and Table 2, as several hematological abnormalities (e.g., hemoglobin, MCHC, PT/APTT) are presented in both tables; consideration should be given to simplifying or consolidating the tables. The findings related to coagulation parameters (PT/APTT), which show higher abnormalities among smokers, are not sufficiently discussed and would benefit from brief interpretation. Overall, the manuscript has good potential but requires revision, particularly in the interpretation of results and discussion of limitations. ********** -->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 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 For information about this choice, including consent withdrawal, please see our Privacy Policy .-->.--> Reviewer #1: Yes: Dr. Aisha Al KhinjiDr. Aisha Al Khinji Reviewer #2: Yes: Shadrack Barffour AwuahShadrack Barffour Awuah Reviewer #3: 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.] To ensure your figures meet our technical requirements, please review our figure guidelines: https://journals.plos.org/plosone/s/figures You may also use PLOS’s free figure tool, NAAS, to help you prepare publication quality figures: https://journals.plos.org/plosone/s/figures#loc-tools-for-figure-preparation. NAAS will assess whether your figures meet our technical requirements by comparing each figure against our figure specifications. |
| Revision 1 |
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The Healthy Smoker Paradox: Socioeconomic Status as a Fundamental Cause of Reversed Anemia Risk among Yemeni Youth PONE-D-25-63271R1 Dear Dr. Radfan saleh Abdullah, 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 will be generated when your article is formally accepted. Please note, if your institution has a publishing partnership with PLOS and your article meets the relevant criteria, all or part of your publication costs will be covered. Please make sure your user information is up-to-date by logging into Editorial Manager at Editorial Manager® and clicking the ‘Update My Information' link at the top of the page. For questions related to billing, please contact and clicking the ‘Update My Information' link at the top of the page. For questions related to billing, please contact billing support .. 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, Marwan Salih Al-Nimer, MD, PhD Academic Editor PLOS One Additional Editor Comments (optional): Reviewers' comments: |
| Formally Accepted |
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PONE-D-25-63271R1 PLOS One Dear Dr. Abdullah, I'm pleased to inform you that your manuscript has been deemed suitable for publication in PLOS One. Congratulations! Your manuscript is now being handed over to our production team. At this stage, our production department will prepare your paper for publication. This includes ensuring the following: * All references, tables, and figures are properly cited * All relevant supporting information is included in the manuscript submission, * There are no issues that prevent the paper from being properly typeset You will receive further instructions from the production team, including instructions on how to review your proof when it is ready. Please keep in mind that we are working through a large volume of accepted articles, so please give us a few days to review your paper and let you know the next and final steps. Lastly, 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. You will receive an invoice from PLOS for your publication fee after your manuscript has reached the completed accept phase. If you receive an email requesting payment before acceptance or for any other service, this may be a phishing scheme. Learn how to identify phishing emails and protect your accounts at https://explore.plos.org/phishing. If we can help with anything else, please email us at customercare@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 Professor Marwan Salih Al-Nimer Academic Editor PLOS One |
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