Energy, macronutrients and laryngeal cancer risk

Background: A role for diet in laryngeal carcinogenesis has been suggested, but only a few studies have examined the potential relationship with a wide variety of macronutrients. Patients and methods: A case-control study was conducted between 1992 and 2000 in Italy and Switzerland, including 527 incident cases of laryngeal cancer, and 1297 controls hospitalized for acute, non-neoplastic conditions. The subjects' usual diet was investigated through a validated food frequency questionnaire, including 78 foods and beverages. Odds ratios (ORs) and 95% confidence intervals (CIs) were estimated using unconditional multiple logistic regression models. Results: Cases reported higher energy intake than controls. The continuous OR for 100 kcal/day was 1.16 (95% CI 1.12-1.21) for alcohol energy, and 1.02 (95% CI 1.01-1.04) for non-alcohol energy. A significantly increased risk of laryngeal cancer was observed for animal protein (continuous OR = 1.21, 95% CI 1.03-1.41), polyunsaturated fats other than linoleic and linolenic fatty acids (OR = 1.43, 95% CI 1.19-1.70), and cholesterol intake (OR = 1.43, 95% CI 1.19-1.71). Laryngeal cancer risk was slightly reduced with increasing vegetable protein (OR = 0.75, 95% CI 0.62-0.91), sugar (OR = 0.84, 95% CI 0.71-1.00) and monounsaturated fatty acid intake (OR = 0.83, 95% CI 0.70-0.99). Conclusions: Laryngeal cancer cases have a higher energy intake than control subjects, and report a higher intake of animal protein and cholestero

A theory of L1L^1-dissipative solvers for scalar conservation laws with discontinuous flux

We propose a general framework for the study of $L^1$ contractive semigroups of solutions to conservation laws with discontinuous flux. Developing the ideas of a number of preceding works we claim that the whole admissibility issue is reduced to the selection of a family of "elementary solutions", which are certain piecewise constant stationary weak solutions. We refer to such a family as a "germ". It is well known that (CL) admits many different $L^1$ contractive semigroups, some of which reflects different physical applications. We revisit a number of the existing admissibility (or entropy) conditions and identify the germs that underly these conditions. We devote specific attention to the anishing viscosity" germ, which is a way to express the "$\Gamma$-condition" of Diehl. For any given germ, we formulate "germ-based" admissibility conditions in the form of a trace condition on the flux discontinuity line $x=0$ (in the spirit of Vol'pert) and in the form of a family of global entropy inequalities (following Kruzhkov and Carrillo). We characterize those germs that lead to the $L^1$-contraction property for the associated admissible solutions. Our approach offers a streamlined and unifying perspective on many of the known entropy conditions, making it possible to recover earlier uniqueness results under weaker conditions than before, and to provide new results for other less studied problems. Several strategies for proving the existence of admissible solutions are discussed, and existence results are given for fluxes satisfying some additional conditions. These are based on convergence results either for the vanishing viscosity method (with standard viscosity or with specific viscosities "adapted" to the choice of a germ), or for specific germ-adapted finite volume schemes

Faktori rizika od karcinoma larinksa u Crnoj Gori

Laryngeal cancer is the most common head and neck cancer. There might be many risk factors for laryngeal cancer. Smoking, especially cigarette smoking and alcohol are indisputable risk factors. The authors of this paper assessed the presumed risk factors in order to identify possible aetiological agents of the disease. A hospital-based case-control study was conducted. The study group consisted of 108 histologically verified laryngeal cancer patients and 108 hospital controls matched by sex, age (±3 years) and place of residence. Laryngeal cancer patients and controls were interviewed during their hospital stay using a structured questionnaire. According to multiple logistic regression analysis six variables were independently related to laryngeal cancer: hard liquor consumption (Odd Ratio /OR/=2.93, Confidence Interval /CI/ 95 % = 1.17 to 7.31), consumption more than 2 alcoholic drinks per day (OR=4.96, CI 95 % = 2.04 to12.04), cigarette smoking for more than 40 years (OR=4.32, CI 95 % = 1.69 to 11.06), smoking more than 30 cigarettes per day (OR=4.24, CI 95 % = 1.75 to 10.27), coffee consumption more than 5 cups per day (OR=4.52, CI 95 % = 1.01 to 20.12) and carbonated beverage consumption (OR=0.38, CI 95 %= 0.16 to 0.92). The great majority of laryngeal cancers could be prevented by eliminating tobacco smoking and alcohol consumption.Maligni tumori larinksa najčešći su tumori glave i vrata. Glavni faktori rizika od razvoja malignih tumora grkljana su pušenje i konzumiranje alkoholnih pića. Cilj rada bio je ispitivanje potencijalnih faktora rizika od nastanka malignih tumora larinksa. Sprovedena je studija slučaj-kontrola. Studijsku grupu činilo je 108 pacijenata s histološki verificiranim rakom larinksa i 108 kontrola individualno izjednačenih po spolu, dobi (± 3 godine) i mjestu stanovanja. Svi ispitanici su anketirani ciljanim epidemiološkim upitnikom a u analizi podataka korištena je multivarijantna logistička regresijska analiza. Koristeći se multivarijantnom logističkom regresijskom analizom, statistički značajnu povezanost s rakom larinksa dobili smo za sljedeće varijable: konzumiranje žestokih pića (omjer izgleda /OR/=2.93, interval pouzdanosti /CI/ 95 % = 1.17 do 7.31), konzumiranje više od 2 alkoholna pića na dan (OR = 4.96, CI 95 % = 2.04 do 12.04), konzumiranje cigareta duže od 40 godina (OR = 4.32, CI 95 % = 1.69 do 11.06), konzumiranje više od 30 cigareta na dan (OR = 4.24, CI 95 % = 1.75 do 10.27), konzumiranje više od 5 šalica kave na dan (OR = 4.52, CI 95 % = 1.01 do 20.12) i konzumiranje gaziranih pića (OR = 0.38, CI 95 % = 0.16 do 0.92). Obolijevanje zbog malignih tumora larinksa moglo bi se značajno smanjiti prestankom konzumiranja duhana i alkohola