UNLABELLED Background. Food frequency questionnaires are used to assess dietary intake in epidemiological studies. Objective. The aim of the study was to assess the relative validity and reproducibility of a quantitative food frequency questionnaire (QFFQ) for adolescents with type 1 diabetes. METHODS Validity was evaluated by comparing the data generated by QFFQs to those of 24-hour recalls ...

many other biomedical journals dealing with cancer research, often publishes papers whose principal aim it is to test the association between quantative measurements of biological variables. When these are expressed on continuous scales, the statistics most frequently adopted to test their association are the Bravais-Pearson (parametric) and the Spearman (non-parametric) correlation coefficient...

OBJECTIVE To evaluate the validity and reproducibility of a food frequency questionnaire (FFQ) developed for assessing the association between dietary factors and breast cancer risk among Chinese women in Guangdong. METHODS 61 women (24-64 years) were recruited from the community in Guangzhou city. An 81-item FFQ was administered twice, one year apart (FFQ1, FFQ2). In the mean time, six 3-day...

PURPOSE To determine the reproducibility, responsiveness and concurrent validity of Dutch versions of the Fatigue Severity Scale (FSS), Modified Fatigue Impact Scale (MFIS), and Checklist Individual Strength (CIS20R) in patients with multiple sclerosis (MS). METHOD Forthy-three ambulatory patients with MS (mean age 48.7 years; SD 7 years; 30 women; median Expanded Disability Status Scale scor...

BACKGROUND Diseases of the circulatory system (DCS) are the major cause of death in Brazil and worldwide. OBJECTIVE To correlate the compensated and adjusted mortality rates due to DCS in the Rio de Janeiro State municipalities between 1979 and 2010 with the Human Development Index (HDI) from 1970 onwards. METHODS Population and death data were obtained in DATASUS/MS database. Mortality rat...

abstract          background and objectives: concentration low-density lipoprotein (ldl) is one of the strongest indicators of atherosclerosis and predicts the diagnosis of cardiovascular diseases. ldl measurement accuracy is very important. ldl can be measured directly, such as enzymatic and nephelometry methods or can be calculated using friedewald's formula. despite the development of e...

The intrusion detection problem has been frequently studied, but intrusion detection methods are often based on a single point of view, which always limits the results. In this paper, we introduce a new intrusion detection model based on the combination of different current methods. First we use a notion of distance to unify the different methods. Second we combine these methods using the Pears...

K-means clustering algorithm has been used to classify major world stock market indices as well as most important assets in the Warsaw stock exchange (GPW). In addition, to obtain information about mutual connections between indices and stocks, the Granger-causality test has been applied and the Pearson R correlation coefficients have been calculated. It has been found that the three procedures...

Context: Proprioception of the knee joint. Objective: To determine the difference in knee-joint-angle reproduction in women with and without genu recurvatum (GR). Design: Between-subjects. Setting: Clinic. Subjects:Twenty-four women divided into 2 groups according to their standing kneeextension angle. Main Outcome Measures: Each subject's ability to actively reproduce active positioning of 3 k...