AI Article Synopsis
- - The study examines the methodological challenges in assessing Long Covid in children and young people (CYP), particularly regarding issues like non-response and attrition that could lead to biased findings.
- - It aims to create survey weights for the CLoCk study to better understand the prevalence of symptoms (like shortness of breath and tiredness) over time in both SARS-CoV-2 positive and negative CYP.
- - The successful development and application of flexible survey weights allow for the adjustment of findings, making them more generalizable to the overall CYP population in England and emphasizing the need to account for selection biases when analyzing such studies.
Article Abstract
Background: Findings from studies assessing Long Covid in children and young people (CYP) need to be assessed in light of their methodological limitations. For example, if non-response and/or attrition over time systematically differ by sub-groups of CYP, findings could be biased and any generalisation limited. The present study aimed to (i) construct survey weights for the Children and young people with Long Covid (CLoCk) study, and (ii) apply them to published CLoCk findings showing the prevalence of shortness of breath and tiredness increased over time from baseline to 12-months post-baseline in both SARS-CoV-2 Positive and Negative CYP.
Methods: Logistic regression models were fitted to compute the probability of (i) Responding given envisioned to take part, (ii) Responding timely given responded, and (iii) (Re)infection given timely response. Response, timely response and (re)infection weights were generated as the reciprocal of the corresponding probability, with an overall 'envisioned population' survey weight derived as the product of these weights. Survey weights were trimmed, and an interactive tool developed to re-calibrate target population survey weights to the general population using data from the 2021 UK Census.
Results: Flexible survey weights for the CLoCk study were successfully developed. In the illustrative example, re-weighted results (when accounting for selection in response, attrition, and (re)infection) were consistent with published findings.
Conclusions: Flexible survey weights to address potential bias and selection issues were created for and used in the CLoCk study. Previously reported prospective findings from CLoCk are generalisable to the wider population of CYP in England. This study highlights the importance of considering selection into a sample and attrition over time when considering generalisability of findings.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11188173 | PMC |
| http://dx.doi.org/10.1186/s12874-024-02219-0 | DOI Listing |
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