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The journal of nutrition, health & aging

, Volume 23, Issue 4, pp 397–397 | Cite as

Insufficient Reporting of Randomization Procedures and Unexplained Unequal Allocation: A Commentary on “Dairy-Based and Energy-Enriched Berry-Based Snacks Improve or Maintain Nutritional and Functional Status in Older People in Home Care”

  • I. NykänenEmail author
Letter to the Editor

Dear Editor,

We have read with interest the letter from D.B. Allison al. (1) in response to our article and we want to make some comments.

The participants in the study had 2:1 randomization to the groups. According to the research plan, the aim was to recruit 100 participants in the intervention group and 50 participants in the control group. Due to recruitment challenges, the number of subjects was smaller, but the relationship between the groups remained as planned due to structured randomization. In this study, power calculation showed that each subgroup required 35 subjects to achieve a statistical power of 0.80 with α of 0.05. This is reported in the paragraph of statistical analyses. The plan to recruit two thirds of the subjects to the intervention group and one third to the control group is based on our previous experiences about the challenges in committing nutrition intervention studies in the elderly. For example, in the previous Nutormed study (2), we used about the same allocation.

References

  1. 1.
    Kahathuduwa CN, Allison DB. Letter to the editor: Insufficient Reporting of Randomization Procedures and Unexplained Unequal Allocation: A Commentary on “Dairy-Based and Energy-Enriched Berry-Based Snacks Improve or Maintain Nutritional and Functional Status in Older People in Home Care”, J Nutr Health Aging, in pressGoogle Scholar
  2. 2.
    Pölönen S, Tiihonen M, Hartikainen S, Nykänen I. Individually Tailored Dietary Counselling among Old Home Care Clients - Effects on Nutritional Status. J Nutr Health Aging. 2017;21:567–572CrossRefPubMedGoogle Scholar

Copyright information

© Serdi and Springer-Verlag International SAS, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Institute of Public Health and Clinical NutritionUniversity of Eastern FinlandKuopioFinland

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