جانانی, لیلا
دانشگاه علوم پزشکی ایران، دانشکده بهداشت، گروه آمار زیستی
[ 1 ] - اثر مکمل یاری ویتامین های D، C و E بر نتایج تست های اسپیرومتری و پلتیسموگرافی در بزرگسالان مبتلا به فیبروز ریوی
Background: Idiopathic pulmonary fibrosis is one of the most important chronic respiratory diseases. One of the causes of its occurrence and exacerbation is imbalance in the antioxidant and inflammatory systems. The aim of this study was to evaluate the effect of supplementation of these vitamins on functional lung tests in adults with pulmonary fibrosis. Methods: 33 patients participated in t...
[ 2 ] - A double blind randomized clinical trial to investigate the effect of vitamin D supplementation on metabolic and hepato-renal markers in type 2 diabetes and obesity
Background: According to the recent studies, vitamin D deficiency has been correlated with progress in type 2 Diabetes and Metabolic Syndrome. The aim of this study was to assess the effect of vitamin D supplementation on glucose and lipid profiles, blood pressure, and biomarkers of liver and kidney in type 2 diabetic patients. Methods: In this Double blinded randomized clinical t...
[ 3 ] - Important considerations in calculating and reporting of sample size in randomized controlled trials
Background: The calculation of the sample size is one of the most important steps in designing a randomized controlled trial. The purpose of this study is drawing the attention of researchers to the importance of calculating and reporting the sample size in randomized controlled trials. Methods: We reviewed related literature and guidelines and discussed some important issues in s...
[ 4 ] - P-value: What is and what is not
The misinterpretation and misuse of p-value have been increasing for decades. In March 2016, the American Statistical Association released a statement to warn about the use and interpretation of p-value. In this study, we provided a definition and discussion of p-value and emphasized the importance of its accurate interpretation.
[ 5 ] - The Effect of Self-Care Education Program on Anthropometric Indicators in Postmenopausal Women With Metabolic Syndrome
Background: Metabolic syndrome is a disorder associated with obesity. Compared with men, postmenopausal women are at higher risk of being affected by this chronic disease. This study aimed to determine the effect of self-care education program on anthropometric indicators in postmenopausal women with metabolic syndrome. Methods: A cluster randomized controlled trial was performed on 120 postme...
[ 6 ] - تحلیل به قصد درمان در مطالعات کارآزمایی بالینی: یک مطالعه مروری
Background & Aim: Randomized controlled trials often suffer from two major problems, i.e., noncompliance and missing outcomes. One potential solution to this problem is using the intention-to-treat (ITT) analysis approach. Therefore, the aim of this study was to review the concept of ITT and the most important issues related to it in practice since RCT researchers utilize it as a guide in order...
[ 7 ] - تصادفی سازی در مطالعات کارآزمایی بالینی: از تئوری تا عمل
Background & Aim: Randomized clinical trials (RCTs) are studies which are able to provide the most valid evidence to compare various interventions in health research. Biases can affect the quality of research and ultimately make the results of a study invalid. One of the most important biases is selection bias. The best way to reduce selection bias is the use of random allocation. The aim of th...
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