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Longitudinal studies are also widely used in other medical and social science fields. For instance, in cardiovascular research, they can monitor patients' health over decades to identify risk factors for heart disease, such as high cholesterol or smoking, and evaluate the long-term effectiveness of preventive measures. Similarly, in mental health studies, researchers might follow individuals from adolescence into adulthood to understand the development and progression of conditions like...
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Using Cholesky Decomposition to Explore Individual Differences in Longitudinal Relations between Reading Skills
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New GOLD classification: longitudinal data on group assignment.

Ciro Casanova1, Jose M Marin, Cristina Martinez-Gonzalez

  • 1Pulmonary Department, Hospital Universitario Ntra, Sra, de La Candelaria, Santa Cruz de Tenerife, Tenerife, Spain. casanovaciro@gmail.com.

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The GOLD strategy for COPD staging shows patient group assignment varies by symptom assessment tool. Longitudinal changes in COPD Assessment Test (CAT) and BODE index scores predict category changes over one year.

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Area of Science:

  • Pulmonary Medicine
  • Respiratory Disease Research

Background:

  • Limited understanding of longitudinal changes with the 2013 Global Initiative for Chronic Obstructive Lung Disease (GOLD) strategy update.
  • Need to assess the impact of multidimensional GOLD staging on COPD patient classification over time.

Purpose of the Study:

  • Determine COPD patient distribution using the new multidimensional GOLD proposal.
  • Evaluate changes in GOLD classification over one year compared to spirometry-only staging.

Main Methods:

  • Analysis of the multicenter observational Spanish CHAIN study cohort.
  • Categorization based on FEV1%, mMRC dyspnea, COPD Assessment Test (CAT), CCQ, and exacerbations/hospitalizations.
  • One-year follow-up data analyzed for changes in patient classification.

Main Results:

  • Baseline distribution varied significantly between mMRC dyspnea and CAT assessments.
  • 64.2% of patients remained in the same GOLD group after one year, with notable variability in groups C and D.
  • Annual progression was linked to changes in CAT scores (RR 1.138) and BODE index values (RR 2.012).

Conclusions:

  • Symptom assessment tool choice significantly impacts GOLD group assignment.
  • One-year category shifts in COPD patients correlate with longitudinal changes in CAT and BODE index.