Prevalence and cumulative 5-year incidence of chronic lymphocytic leukemia in the adult population in the Russian Federation and Ukraine: Data from the LEUKOSPECT study.

OBJECTIVES: LEUKOSPECT was a retrospective, multicenter, epidemiologic study carried out in Russia and Ukraine, aiming to assess the prevalence and cumulative 5-year incidence of chronic lymphocytic leukemia (CLL) in the adult population. METHODS: All data were collected manually from patient medical records at each of the study sites and from official censuses. CLL prevalence and incidence were determined from a count of CLL cases (previously diagnosed and new cases) in the population who made at least one clinic visit for CLL during the period from 1 January 2009 to 31 December 2013. RESULTS: The recorded cumulative 5-year incidence of CLL during the study ranged from 1.46 per 100 000 persons (95% CI: 0.85-2.34) in Yekaterinburg, Russia, to 4.34 per 100 000 persons (95% CI: 2.48-7.04) in Luhansk, Ukraine. In 2013, the lowest prevalence of CLL was also recorded in Yekaterinburg: 7.11 per 100 000 persons (95% CI: 5.67-8.81). This was approximately 3.1 times lower than in Luhansk (21.92 per 100 000 population; 95% CI: 17.38-27.28). CONCLUSION: The results of this study show diverse CLL incidence and prevalence patterns in the adult population of the Russian Federation and Ukraine. Authors propose a more comprehensive study with large region involvement to provide a more precise description of the incidence and prevalence of CLL in Eastern European countries and to better understand disparities reported versus the USA and other Western countries.

Preconcentration and fluorimetric determination of polycyclic aromatic hydrocarbons based on the acid-induced cloud-point extraction with sodium dodecylsulfate.

The acid-induced cloud-point extraction (CPE) technique based on sodium dodecylsulfate (SDS) micelles has been used for preconcentration of ten representatives of polycyclic aromatic hydrocarbons (PAHs) for the following fluorescence determination. The effect of the acidity of solution, SDS and electrolyte concentrations, centrifugation time and rate on the two-phase separation process and extraction percentages of PAHs have systematically been examined. Extraction percentages have been obtained for all PAHs after CPE ranged from 67 to 93%. Pyrene was used as a fluorescent probe to monitor the micropolarity of the surfactant-rich phase compared with SDS micelles and this allows one to conclude that water content in micellar phase after CPE is reduced. The spectral, metrological and analytical characteristics of PAH fluorimetric determination after acid-based CPE with sodium dodecylsulfate are presented. Advantages provided by using CPE in combination with fluorimetric determination of PAHs are discussed. The determination of benz[a]pyrene in tap water is presented as an example.