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Following PCA analysis with Varimax Rotation conducted on the PACT-Q2 part completed at M3, four factors were retained based on an eigenvalue greater than one, representing 53% of the total variance.
Items were retained based on quantitative and qualitative criteria, including strong factor loadings, distinctness from other items, and normal distributive properties.
In all regression models risk factors were explored using univariable regression analysis and were retained in the multivariable model based on forward selection; hypothesized risk factors were included and confounders were retained based on univariable P<0.2.
The residues were retained based on model predictions.
All items were retained based on clinical relevance in addition to psychometrics.
First, articles were retained based on their titles, keywords and summaries.
Similar(43)
Although findings indicate that the Cronbach's alpha for the domain of Abdominal Symptoms would increase slightly to 0.69 with the deletion of "passing gas," the item was retained based on importance of this symptom from the patient perspective.
Although findings indicate that the Cronbach's alpha for the domain of Abdominal Symptoms would increase to 0.79 with the deletion of "passing gas," the item was retained based on importance of this symptom from the patient perspective and expert opinion.
This cutoff value was retained based on statistical considerations because it was the optimal compromise between sensitivity and specificity on the ROC curve.
The factors were rotated orthogonally to maintain an uncorrelated state and improve interpretability, and a two-factor solution was retained based on eigenvalues, scree plot, and factor interpretability.
In each of the three settings, a number, p, of features are retained based on theirs aggregated score over 10000 runs.
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CEO of Professional Science Editing for Scientists @ prosciediting.com