Sentences with phrase «case control studies examining»

Not exact matches

Researchers looked at a total of four case - control studies that examined the association between swaddling and SIDS.

To examine whether improved room ventilation by use of a fan or an open window affects the risk of SIDS, we analyzed data from a population - based case - control study of risk factors for SIDS that included detailed information on sleep environment.

In this meta - analysis of published (1995 - 2011) case - control studies examining the relationship between breastfeeding and childhood leukemia, all analyses, except the subanalysis for AML alone, which was not statistically significant, showed that being breastfed for at least 6 months compared with less than that or not at all was significantly associated with a 14 % to 20 % lower risk for childhood leukemia, with a 20 % lower risk when all selected 17 studies were included in the analysis.

A single, small, retrospective case - control study examined the use of newborn transient evoked otoacoustic emission hearing screening tests as a tool for identifying infants at subsequent risk of SIDS.343 Infants who subsequently died from SIDS did not fail their hearing tests but, compared with controls, showed a decreased signal - to - noise ratio score in the right ear only (at frequencies of 2000, 3000, and 4000 Hz).

A case - controlled study in the US examined the role of breastfeeding by dividing groups into > 6 months breastfeeding, 6 months breastfeeding, and artificial feeding.

The authors examined the relationship between UVR and XFS in a study with clinic participants in the United States (118 cases, 106 control patients) and Israel (67 cases, 72 control participants).

The study examined 328 patients with cervical cancer and 1,312 controls, matched on age and decade, who enrolled in a hospital - based case - control study drawn from 26,831 patients who received treatment at Roswell Park Cancer Institute and completed the Patient Epidemiology Data System questionnaire between 1982 and 1998.

Although various studies propose a connection between childhood ADHD and obesity, «this is the first population - based longitudinal study to examine the association between ADHD and development of obesity using ADHD cases and controls of both sexes derived from the same birth cohort,» says lead author Seema Kumar, M.D., pediatrician and researcher at Mayo Clinic Children's Research Center.

The team is now examining whether there is a relationship between antioxidant nutrient intake and kidney cancer risk in a National Cancer Institute - funded case - control study primarily conducted with participants from the metropolitan Detroit area.

We examined 152 SNPs in 71 candidate genes for association with diabetes status and related phenotypes in 2,134 Caucasians in a case - control study and an independent quantitative trait (QT) cohort in the United Kingdom.

Factors examined as potential confounders or effect modifiers included age (at breast cancer diagnosis for cases, at time of study enrollment for controls), age at first birth, number of children, birth of a son, history of breastfeeding, miscarriage, abortion, oral contraceptive use, smoking status, age at menarche and number of cell equivalents tested for detection of FMc.

Methods: We combined data from two population - based case - control studies to examine the relationship between migraine and risk of postmenopausal invasive breast cancer among 1,199 ductal carcinoma cases, 739 lobular carcinoma cases, and 1,474 controls 55 to 79 years of age.

Meta - analyses examining the relationship between coffee intake and risk of coronary heart disease have observed a positive association among case - control studies but not among prospective cohort studies.1, 2 According to the most recent meta - analysis, 1 the pooled case - control data show a 60 % increased risk for drinking 5 cups / d.

Case series of early - intervention approaches13, 22,25,26,40 had mixed results, likely in part because of the substantial heterogeneity of interventions examined even within individual studies, little or no control of concomitant interventions, and poor fidelity to any given approach.

This longitudinal case - control study examines whether hippocampal volume loss occurs during the initial 8 weeks of antipsychotic treatment and whether it is associated with duration of untreated psychosis, and examines molecular biomarkers in association with hippocampal volume loss and duration of untreated psychosis.