Category Archives: Pulmonary Function : Part 23

Comparison of Tucson and Cracow Longitudinal Studies (Part 3)

The Tucson study is a stratified cluster sample of 1,655 households; the initial sample comprised 3,485 non-Mexican-American whites. Standard respiratory questionnaires were used.- Pulmonary function tests were performed with a pneumotachograph and conformed to American Thoracic Society (ATS)-Snowbird criteria. To be comparable with the Cracow data, a subset of the Tucson database was used, including adults aged 19 to 70 years during the first survey (1972 to 1973) who had spirometric testing performed in that survey, the survey closest to five years afterward (1977 to 1979), and the survey closest to 13 years afterward (ending 1984). There were 640 subjects (excluding those with a history of chest surgery) who had all three tests during the 12 years of follow-up in the Tucson study. Continue reading

Comparison of Tucson and Cracow Longitudinal Studies (Part 2)

The analysis is conducted in parallel within each population, as an attempt to select the symptom or group of symptoms most strongly related to lung function levels and changes in both populations, and to analyze possible differences in these relationships in specific age or smoking habit categories in the two populations. The Cracow study consisted of three surveys performed over a 13-year follow-up period, and the data on subjects seen in all three surveys were used in this analysis. In the Tucson study, ten surveys were performed until 1988, but only the data on subjects seen in surveys 1, 5, and 8 were used in this analysis to have the follow-up times the most comparable with those in Cracow. Also, the uniform definitions of variables and methods of analysis were applied to this analysis in both studies. This enables the crossvalidation of the analytical results between the studies. Such interstudy comparisons have proved useful in clarifying some features of obstructive airway disease. flovent inhaler
Continue reading

Comparison of Tucson and Cracow Longitudinal Studies (Part 1)

Comparison of Tucson and Cracow Longitudinal Studies (Part 1)Chronic obstructive airways disease encompasses a spectrum of pathophysiologic processes ranging from the emphysema of older male heavy smokers to the inflammatory bronchial obstruction seen in those with chronic asthma. These different pathophysiologic mechanisms that underlie airways obstruction are often suggested by the clinical symptomatology as revealed in the medical history or from questionnaires. With this in mind, investigators studying the natural history of obstructive airways diseases have explored initial symptoms as predictors of disease and death. These studies have concentrated mainly on symptoms indicative of mucous hypersecretion, cough, and sputum. However, different symptoms or symptom complexes or the changes in the symptoms over time rarely have been examined as predictors of pulmonary function change or the development of airway obstruction. buy asthma inhaler
Continue reading

Pages: Prev 1 2 3 ... 13 14 15 16 17 18 19 20 21 22 23