A Novel Scoring System to Measure Radiographic Abnormalities and Related Spirometric Values in Cured Pulmonary TuberculosisReportar como inadecuado




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Background

Despite chemotherapy, patients with cured pulmonary tuberculosis may result in lung functional impairment.

Objective

To evaluate a novel scoring system based on the degree of radiographic abnormalities and related spirometric values in patients with cured pulmonary tuberculosis.

Methods

One hundred and twenty seven patients with cured pulmonary tuberculosis were prospectively enrolled in a referral hospital specializing in respiratory diseases. Spirometry was performed and the extent of radiographic abnormalities was evaluated twice by each of two readers to generate a novel quantitative score. Scoring reproducibility was analyzed by the intra-class correlation coefficient ICC and the Bland-Altman method. Multiple linear regression models were performed to assess the association of the extent of radiographic abnormalities with spirometric values.

Results

The intra-observer agreement for scoring of radiographic abnormalities SRA showed an ICC of 0.81 CI:95%, 0.67–0.95 and 0.78 CI:95%, 0.65–0.92, for reader 1 and 2, respectively. Inter-observer reproducibility for the first measurement was 0.83 CI:95%, 0.71–0.95, and for the second measurement was 0.74 CI:95%, 0.58–0.90. The Bland-Altman analysis of the intra-observer agreement showed a mean bias of 0.87% and -0.55% and an inter-observer agreement of -0.35% and -1.78%, indicating a minor average systematic variability.After adjustment for age, gender, height, smoking status, pack-years of smoking, and degree of dyspnea, the scoring degree of radiographic abnormalities was significantly and negatively associated with absolute and percent predicted values of FVC: -0.07 CI:95% -0.01 to -0.04; -2.48 CI:95% -3.45 to -1.50; and FEV1 -0.07 CI:95% -0.10 to -0.05; -2.92 CI:95% -3.87 to -1.97 respectively, in the patients studied.

Conclusion

The extent of radiographic abnormalities, as evaluated through our novel scoring system, was inversely associated with spirometric values, and exhibited good reliability and reproducibility. As intra-observer and inter-observer agreement of the SRA varied from good to excellent, the use of SRA in this setting appears acceptable.



Autor: Renata Báez-Saldaña , Yesenia López-Arteaga, Alma Bizarrón-Muro, Elizabeth Ferreira-Guerrero, Leticia Ferreyra-Reyes, Guadalu

Fuente: http://plos.srce.hr/



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