The spirometric reference values used in Occupational Medicine are generally derived from the tables ECSC 71 or from the “summary equations” ECSC/ERS 83-93. To identify the most appropriate ones for the laboratory of Cagliari we have calculated the sum of the residuals (_R) between the individual observed and predicted value relatively to the Vital Capacity (VC), the FEV1 and the Residual Volume (RV) on a sample of 163 healthy males. While the ΣR for the VC is very near to the zero (-0.022 litres) using the ECSC 71 reference values, the observed values are in average 323 ml higher than the CECA/ERS 83-93 predictions. Similar results are observed for the FEV1 (ΣR +0.041 using the CECA71 values and +0.187 using the CECA/ERS 83-93 equations). Also as it regards the RV the CECA71 reference values are more appropriate for our normal subjects (ΣR +0.038 litres) in comparison to those derived from the CECA/ERS 83-93 equations resulting too elevated (ΣR –0.445 litres). In conclusion, the reference values drawn from the ECSC 71 tables result more appropriate for our laboratory both for the dynamic and static volumes, being the CECA/ERS 83-93 reference values too low for the dynamic volumes and too high for the static volumesThe spirometric reference values used in Occupational Medicine are generally derived from the tables ECSC 71 or from the “summary equations” ECSC/ERS 83-93. To identify the most appropriate ones for the laboratory of Cagliari we have calculated the sum of the residuals (_R) between the individual observed and predicted value relatively to the Vital Capacity (VC), the FEV1 and the Residual Volume (RV) on a sample of 163 healthy males. While the ΣR for the VC is very near to the zero (-0.022 litres) using the ECSC 71 reference values, the observed values are in average 323 ml higher than the CECA/ERS 83-93 predictions. Similar results are observed for the FEV1 (ΣR +0.041 using the CECA71 values and +0.187 using the CECA/ERS 83-93 equations). Also as it regards the RV the CECA71 reference values are more appropriate for our normal subjects (ΣR +0.038 litres) in comparison to those derived from the CECA/ERS 83-93 equations resulting too elevated (ΣR –0.445 litres). In conclusion, the reference values drawn from the ECSC 71 tables result more appropriate for our laboratory both for the dynamic and static volumes, being the CECA/ERS 83-93 reference values too low for the dynamic volumes and too high for the static volumes.
Valori di riferimento per gli esami di funzionalità respiratoria
ARU, GABRIELLA
2010-01-01
Abstract
The spirometric reference values used in Occupational Medicine are generally derived from the tables ECSC 71 or from the “summary equations” ECSC/ERS 83-93. To identify the most appropriate ones for the laboratory of Cagliari we have calculated the sum of the residuals (_R) between the individual observed and predicted value relatively to the Vital Capacity (VC), the FEV1 and the Residual Volume (RV) on a sample of 163 healthy males. While the ΣR for the VC is very near to the zero (-0.022 litres) using the ECSC 71 reference values, the observed values are in average 323 ml higher than the CECA/ERS 83-93 predictions. Similar results are observed for the FEV1 (ΣR +0.041 using the CECA71 values and +0.187 using the CECA/ERS 83-93 equations). Also as it regards the RV the CECA71 reference values are more appropriate for our normal subjects (ΣR +0.038 litres) in comparison to those derived from the CECA/ERS 83-93 equations resulting too elevated (ΣR –0.445 litres). In conclusion, the reference values drawn from the ECSC 71 tables result more appropriate for our laboratory both for the dynamic and static volumes, being the CECA/ERS 83-93 reference values too low for the dynamic volumes and too high for the static volumesThe spirometric reference values used in Occupational Medicine are generally derived from the tables ECSC 71 or from the “summary equations” ECSC/ERS 83-93. To identify the most appropriate ones for the laboratory of Cagliari we have calculated the sum of the residuals (_R) between the individual observed and predicted value relatively to the Vital Capacity (VC), the FEV1 and the Residual Volume (RV) on a sample of 163 healthy males. While the ΣR for the VC is very near to the zero (-0.022 litres) using the ECSC 71 reference values, the observed values are in average 323 ml higher than the CECA/ERS 83-93 predictions. Similar results are observed for the FEV1 (ΣR +0.041 using the CECA71 values and +0.187 using the CECA/ERS 83-93 equations). Also as it regards the RV the CECA71 reference values are more appropriate for our normal subjects (ΣR +0.038 litres) in comparison to those derived from the CECA/ERS 83-93 equations resulting too elevated (ΣR –0.445 litres). In conclusion, the reference values drawn from the ECSC 71 tables result more appropriate for our laboratory both for the dynamic and static volumes, being the CECA/ERS 83-93 reference values too low for the dynamic volumes and too high for the static volumes.
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