Review for 10.1186/s12876-021-01679-8 (2021)

Reviewer’s report
Title: 
Outcomes and survival of infants with congenital duodenal obstruction
following Kimura procedure with post-anastomosis jejunostomy feeding tube
Version: 
1 
Date: 
20 Jul 2020
Reviewer's report:
The authors have now provided a revised manuscript, which includes a subgroup
analysis of outcomes stratified by sex. They have further described important
limitations of the study in the discussion section. Both additions strengthen the
manuscript and adequately address my previous concerns.
One remaining concern, which I did not recognize previously, is the uniform use
of Mann Whitney U tests for determining differences between the two treatment
groups. This is acceptable for quantitative data as age, weight, symptom
frequency or operation time, etc. However, the outcomes sex, sonography result,
associated anomaly, obstruction type and survival/death are in fact qualitative
data, which require other tests, such as Fisher's exact test. Although this issue
likely does not affect the overall outcome of the paper, it is important, easily
corrected and should thus be addressed.
As a minor point, it would be helpful if the authors could include the number of
individuals (i.e. n=) for all groups in the newly provided Table 4.
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Acceptable
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