You could measure smoking cessation as a person not smoking a cigarette for 1 month, or as a person who has not smoked in a year, or a 50% reduction in the number of cigarettes smoked. Clearly the operational definition of the dependent variable is an important step in the design of the study.Some other health related conceptual variables that have many operational definitions: intelligence, fitness, health, quality of life.ou could measure smoking cessation as a person not smoking a cigarette for 1 month, or as a person who has not smoked in a year, or a 50% reduction in the number of cigarettes smoked. Clearly the operational definition of the dependent variable is an important step in the design of the study.
The majority of influenza vaccines distributed in the United States contain thimerosal as a preservative. However, an increasing amount is thimerosal-free. While the multiple dose vials still have thimerosal to prevent bacterial growth, the single-dose preparations do not.The amount of influenza vaccine that is thimerosal-free is growing every year. Thimerosal contains ethyl mercury. 2  This is a different chemical compound than mercury found in the environment (methylmercury). 3  Thimerosal has been used as a preservative since the 1930s to prevent bacterial growth in vials containing multiple doses of vaccine and other medical products.
Thank you for alerting me to this side effect. I stopped taking the Advair 10 days ago after my doctor changed my medication, and my voice is gradually returning to normal. A. The steroid fluticasone found in Advair and Flovent can cause hoarseness, throat irritation and cough.These complications appear more common than many health professionals realize (Journal of Laryngology and Otology, Oct. 2008). have been using Advair inhaler for about 6 months for Asthma And COPD. My voice became hoarse, which I knew was a side effect and can deal with. Also a slight cough and clearing my throat became apparent.