Correction to: npj Digital Medicine https://doi.org/10.1038/s41746-021-00391-x, published online 16 February 2021
The original version of the published Article mistakenly omitted the variable names in the description of the statistical methods. To improve clarity, the variable names have been added to the description of the statistical methods as follows:
Where:
-
1.
Yi,t is a day level activity feature or day level self-report of constipation severity for individual i (for i = 1, 2, 3, …, n, where n is the number of participants in the Behavioral Analysis Population), on day t (for t = 1, 2, 3, …, 112th day of study)
-
2.
medicationi,t is a binary variable that is 1 for individual i on day t if a laxative is reported taken, else 0
-
3.
BMpatternj,i,t is a dummy-coded variable indicating if individual i reported being constipated or irregular as opposed to regular on day t, with regular BM pattern being the reference state
-
4.
ui is a random intercept that is allowed to vary for each participant
Where:
-
1.
medicationi,t is a binary variable that is 1 for individual i on day t if a laxative is reported taken, else 0
-
2.
symptomj,i,t is an ordinal symptom severity indicator for individual i on day t with levels ranging from 0 to 4 for each of the j symptom types (e.g., gas, difficulty passing, etc.), with 0 indicating no symptoms and 4 indicating most severe symptoms
-
3.
BMpatternk,i,t is a dummy variable indicating if individual i reported being constipated, irregular, or “none of the above” as opposed to regular on day t, with regular BM pattern being the reference state
The HTML and PDF versions of the Article have been corrected.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
About this article
Cite this article
Shapiro, A., Bradshaw, B., Landes, S. et al. Author Correction: A novel digital approach to describe real world outcomes among patients with constipation. npj Digit. Med. 4, 61 (2021). https://doi.org/10.1038/s41746-021-00434-3
Published:
DOI: https://doi.org/10.1038/s41746-021-00434-3