ELIZA

return kwic search for research out of >500 occurrences
280501 occurrences (No.89 in the rank) during 5 years in the PubMed. [no cache] 500 found

260) Research by our group and others has recently shown a lower frequency of EGFR mutations in African Americans with NSCLC, as compared to their White counterparts.

--- ABSTRACT ---

PMID:22246415 DOI:10.1177/0962280211434179

2015 Statistical methods in medical research

* Simpson's paradox - aggregating and partitioning populations in health disparities of lung cancer patients.

- It is well known that non-small cell lung cancer (NSCLC) is a heterogeneous group of diseases. Previous studies have demonstrated genetic variation among different ethnic groups in the epidermal growth factor receptor (EGFR) in NSCLC. Research by our group and others has recently shown a lower frequency of EGFR mutations in African Americans with NSCLC, as compared to their White counterparts. In this study, we use our original study data of EGFR pathway genetics in African American NSCLC as an example to illustrate that univariate analyses based on aggregation versus partition of data leads to contradictory results, in order to emphasize the importance of controlling statistical confounding. We further investigate analytic approaches in logistic regression for data with separation, as is the case in our example data set, and apply appropriate methods to identify predictors of EGFR mutation. Our simulation shows that with separated or nearly separated data, penalized maximum likelihood (PML) produces estimates with smallest bias and approximately maintains the nominal value with statistical power equal to or better than that from maximum likelihood and exact conditional likelihood methods. Application of the PML method in our example data set shows that race and EGFR-FISH are independently significant predictors of EGFR mutation.

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(1)42 null	(14)7 that	(27)3 as	(40)2 from
(2)40 on	(15)6 by	(28)3 directions	(41)2 involving
(3)36 is	(16)6 to	(29)3 evidence	(42)2 participants,
(4)27 and	(17)5 projects	(30)3 have	(43)2 progress
(5)25 has	(18)4 culture	(31)3 method	(44)2 sponsored
(6)14 in	(19)4 design	(32)3 results	(45)2 the
(7)12 was	(20)4 findings	(33)3 shows	(46)2 topic
(8)11 are	(21)4 needs	(34)3 study	(47)2 towards
(9)11 should	(22)4 project	(35)3 will	(48)2 trends
(10)9 into	(23)4 questions	(36)2 efforts	(49)2 using
(11)9 with	(24)4 regarding	(37)2 examined	(50)2 we
(12)8 studies	(25)3 &	(38)2 focus	(51)2 work
(13)8 suggests	(26)3 aimed	(39)2 for

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--- WordNet output for research --- =>調査する, 研究(する), 探求, 調査, 捜索, 研究する Overview of noun research The noun research has 2 senses (first 2 from tagged texts) 1. (46) research -- (systematic investigation to establish facts) 2. (6) inquiry, enquiry, research -- (a search for knowledge; "their pottery deserves more research than it has received") Overview of verb research The verb research has 2 senses (first 1 from tagged texts) 1. (1) research -- (attempt to find out in a systematically and scientific manner; "The student researched the history of that word") 2. research, search, explore -- (inquire into; "the students had to research the history of the Second World War for their history project"; "He searched for information on his relatives on the web"; "Scientists are exploring the nature of consciousness") --- WordNet end ---