Iatreia (Jul 2022)

Validation and intra-rater reliability of the CDQ scale for the diagnosis of COPD in Colombia

  • Bastidas-Goyes, Alirio Rodrigo,
  • Hernández-Ramírez, Leidi Angélica,
  • Jiménez-Morales, Silvia Camila,
  • Mateus-Mora, Saskia Lorena,
  • Pachón-Olmos, Juliana Andrea,
  • González-Pinto, Paula Andrea,
  • Lizarazo-Páramo, Lina Paola,
  • Orozco-Mesa, Sebastián

DOI
https://doi.org/10.17533/10.17533/udea.iatreia.141
Journal volume & issue
Vol. 35, no. 3
pp. 258 – 267

Abstract

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Background: COPD is highly underdiagnosed, thus applying clinical prediction scales such as the COPD Diagnostic Questionnaire (CDQ) helps to address this problem. Objective: To evaluate the criterion validity and in-tra-rater reproducibility of the questionnaire CDQ in a Colombian population. Materials and methods: A prospective cohort study. The reproducibility was assessed with the Kappa sta-tistic and the intraclass correlation coefficient (ICC). Validity was established with the score obtained from the CDQ questionnaire and the spirometry values (FEV1/ FVC 16.5 and < 19.5, and high probability of CDQ COPD ≥ 19.6. The ACOR was 0.68 (95%CI: 0.647-0.712), a sensitivity of 79% and a specificity of 44% were obtained for a score ≥16.5, with a PPV of 26% and a NPV of 86%. Conclusions: The CDQ questionnaire has a regu-lar performance for the diagnosis of COPD with an ACOR similar to other questionnaires, it can be useful in underdiagnosed patients. The optimal cut-off point for this population was 16.5.

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