Association between 24 h Urinary Sodium and Potassium Excretion and Dietary Intake in Japanese Male Adolescent Football Players
Round 1
Reviewer 1 Report
- The subjects of the study are all male young athletes. Why are female young athletes not included in the study?
- Among the various foods of the subjects, how can milk and dairy products be independent of other foods and effectively increase urine potassium and reduce urine sodium-to-potassium ratio?
- There are some words or grammatical errors. For example, in line 38, deter-mine should be determine.
Author Response
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Author Response.pdf
Reviewer 2 Report
This study uses 24-hour sodium and potassium excretion and urinary sodium / potassium ratio to evaluate whether the diet of young football players is reasonable, which has not been investigated in the Japanese population and has very important reference value. The data are provided in detail, and standardized statistical analysis is carried out.
（1）Finally, there are only 79 participants in the data analysis, which is slightly less. If the number can be appropriately increased, the credibility of the paper will be improved.
（2） Moreover, most of the data are compared with DRI. If the relevant values of ordinary teenagers in the same age group can be measured at the same time and compared with athletes, the systematic error will be reduced.
（3）This study does not display the data in the form of pictures, hoping to make the characteristic data into pictures to increase the highlights of this study.
Author Response
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Author Response File: Author Response.pdf
Reviewer 3 Report
The submission by Nagashima, et al provides intersting data on what is observed in young adolescents with regards to their dietary habits. The author studied the Na and K intake with a nicely designed comparison to dietary habits. By the way, their results show potential interest for a broad international readership. Indeed, the dietary habits of our adolescents are different of their adult counterparts worlwide.
The study is welle designed, with clear results ans appropriate analysise. The submission is easy to read and to understand. One should probably expect subsequent citations. There are only few comments to be suggested.
Introduction :
- Precise what includes dairy products (for non specialized readers)
- Change Potassium intake increase for Increases in potassium intake
- Change deter-mine for determine
- On the other hand, not on other hand
Discussion:
- This study had a few limitations: change for "has a few…
Conclusion :
- the sentence « It was suggested Japanese adolescent football players was poor dietary behavior early childhood » is unclear. If I understand properly, may be replace with « Our study suggests that Japanese adolescent football players have poor dietary habits beginning in early childhood »
General comments : since the study is intended to be read by a broad international readership, it could be useful to briefly summarize the salient aspects of dietary habits in Japan, as compared with other countries. And whether dietary habits in adolescents are different from adults habits in Japan (as observed in many other countries).
Author Response
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Author Response File: Author Response.pdf
