Abortion can be a very stressful experience for women, and many social and psychological factors can influence this stress. The present study aims to investigate the impact of perceived social support on the marital satisfaction of women who have undergone an abortion. The study also explored whether resilience played a mediating role in this relationship.
View Article and Find Full Text PDFEstradiol (E2) levels on the day progesterone starts may negatively impact implantation, ongoing pregnancy, and live birth rates in frozen embryo transfer (FET). Overall, while the picture isn't entirely clear, some evidence suggests maintaining estradiol levels within a specific range before starting progesterone might be beneficial for frozen transfer success. So we performed a systematic review and meta-analysis to find out the rate of pregnancy-related outcomes of frozen embryo transfer in different level of E2.
View Article and Find Full Text PDFBackground: Despite the World Health Organization's (WHO) emphasis on exclusive breastfeeding, the documents show a declining trend worldwide. Studies assert that the mother's personality traits appear to have an impact on this issue. This study aimed to investigate the potential influence of personality traits on exclusive breastfeeding, which might be channeled by self-efficacy as a mediator variable.
View Article and Find Full Text PDFObjectives: The initiation of exclusive breastfeeding and its continuation plays a vital role in maternal and child health. This study investigates the prediction of exclusive breastfeeding in Iranian mothers using the five-factor model.
Methods: A descriptive correlational study was conducted using cluster random sampling.
Missing data is one of the most important causes in reduction of classification accuracy. Many real datasets suffer from missing values, especially in medical sciences. Imputation is a common way to deal with incomplete datasets.
View Article and Find Full Text PDFBackground: This study aimed at investigating the possible confounding effect of children's gender on the parents' dyads perception of their child HRQoL at both item and scale levels of PedsQL4.0 questionnaire.
Methods: The PedsQL™ 4.
Random selection of initial centroids (centers) for clusters is a fundamental defect in -means clustering algorithm as the algorithm's performance depends on initial centroids and may end up in local optimizations. Various hybrid methods have been introduced to resolve this defect in -means clustering algorithm. As regards, there are no comparative studies comparing these methods in various aspects, the present paper compared three hybrid methods with -means clustering algorithm using concepts of genetic algorithm, minimum spanning tree, and hierarchical clustering method.
View Article and Find Full Text PDFThis manuscript aims to present the first item response theory (IRT) model within a pharmacometric framework to characterize the longitudinal changes of Aberrant Behavior Checklist (ABC) data in children with autism. Data were obtained from 120 patients, which included 20,880 observations of the 58 items for up to three months. Observed scores for each ABC item were modeled as a function of the subject's disability.
View Article and Find Full Text PDFObjectives: To provide a valid sample size strategy based on simulation and to evaluate the statistical power in clinical trials with patient-reported outcomes (PROs) based on a polytomous item response theory model-the graded response model (GRM)-and to compare this framework with the classical test theory (CTT) approach.
Methods: One thousand randomized clinical trials were simulated using PRO based on the GRM and under various combinations of the number of patients in each arm, the group allocation ratio, the number of items and categories, and group effects. The power and sample size estimated in the simulations were then compared with those computed using the CTT framework.
Purpose: In child-parent agreement studies in the field of paediatric health-related quality of life (HRQoL), little attention has been paid to the effect of gender in parental proxy rating of children's HRQoL. This study aims to test the potential interchangeability of parent dyads in reporting children's HRQoL on both item and scale levels of the PedsQL™ 4.0 instrument, using the approach of differential item functioning (DIF).
View Article and Find Full Text PDFIn general, breast cancer is the most common malignancy among women in developed as well as some developing countries, often being the second leading cause of cancer mortality after lung cancer. Using a parametric log-logistic model to consider the effects of prognostic factors, the present study focused on the 5-year survival of women with the diagnosis of breast cancer in Southern Iran. A total of 1,148 women who were diagnosed with primary invasive breast cancer from January 2001 to January 2005 were included and divided into three prognosis groups: poor, medium, and good.
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