[Reference values for lung function testing in adults--results from the study of health in Pomerania" (SHIP)]

The assessment of lung function with spirometry is a frequently performed diagnostic procedure and is considered an important tool in medical monitoring of pulmonary diseases. This study aimed at establishing current reference standards, derived from a representative population sample in West Pomerania of Germany and to compare them to existing data.

Standardized spirometric function tests were performed - 1sec forced respiratory volume (FEV1) and forced vital capacity (FVC) - on 1,809 participants (885 men, 924 women) of a cross-sectional epidemiological survey, called Study of Health in Pomerania ( SHIP).

All persons with cardiac disorders, current smokers and those who were on specific medication which could influence lung functions were excluded, leaving a total of 904 healthy subjects (439 men, 465 women, aged 25-85 years. The results were analysed by quantile regression.

The study provides a representative, gender specific set of predictive equations for lung function parameters by spirometry. Comparison to existing prediction equations revealed a consistent underestimation in the current population. The results help to interpret the results of lung function tests: it is therefore recommended that the existing prediction equations be revised.