نتایج جستجو برای: subgroup analysis
تعداد نتایج: 2878850 فیلتر نتایج به سال:
In this article we introduce the notion of n-capable groups. It is shown that every group G admits a uniquely determined subgroup (〖Z^n)〗^* (G) which is a characteristic subgroup and lies in the n-centre subgroup of the group G. This is the smallest subgroup of G whose factor group is n-capable. Moreover, some properties of n-central extension will be studied.
in order to determine the occurrence of endometriosis in patients with uterine myoma and in those with polycystic ovarian disease (pcod) compared to controls, 540 infertile patients were first divided into two age groups of 20-29 and 30-39. then each group was subdivided to patients with 1) uterine myoma, 2) pcod, and 3) no uterine myoma or pcod (control subgroup). the occurrence of endometrios...
BACKGROUND When subgroup analyses are not correctly analyzed and reported, incorrect conclusions may be drawn, and inappropriate treatments provided. Despite the increased recognition of the importance of subgroup analysis, little information exists regarding the prevalence, appropriateness, and study characteristics that influence subgroup analysis. The objective of this study is to determine ...
background: to investigate the relation between serum leptin levels and cerebral infarction (ci) by meta-analysis. materials and methods: scientific literature databases were searched for studies published in chinese and english. after retrieving relevant articles through database searches and screening using predefined selection criteria, high-quality studies related to our research topic were...
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