oa South African Family Practice - Increased cardiothoracic ratios and hypertension among steel mill workers : letter to the editor
Extracted from text ... SA Fam Pract 2005;47(5) 5 Increased cardiothoracic ratios and hypertension among steel mill workers To the editor: The prevalence of hypertension and increased cardiothoracic ratios was studied in 714 steel mill workers. Hypertension was very prevalent and occurred in 36% of the population. Increased cardiothoracic ratios (defined as increased if more than 0.45) occurred in 42% of the population. A study was performed to measure whether any relationship exists between hypertension and noise-induced hearing loss. In order to lower the inherent bias of the researcher searching for a relationship between two variables, a third variable was also measured, namely CTR ..
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