1952
DOI: 10.1126/science.116.3022.591
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Tables for Use in Fourfold Contingency Tests

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Cited by 89 publications
(19 citation statements)
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“…Means with similar superscripts are not significantly different (P > 0.05). Statistical comparisons were made using fourfold contingency tests (Mainland and Murray, 1952; see text for levels of significance). immature Djungarian hamsters exposed to DD, LDpg ^Q, LDpg, LL and LD16:8.…”
Section: Resultsmentioning
confidence: 99%
“…Means with similar superscripts are not significantly different (P > 0.05). Statistical comparisons were made using fourfold contingency tests (Mainland and Murray, 1952; see text for levels of significance). immature Djungarian hamsters exposed to DD, LDpg ^Q, LDpg, LL and LD16:8.…”
Section: Resultsmentioning
confidence: 99%
“…Tumor incidences and the total number of mammary tumors in each group were tested using the fourfold contingency table (22) and analyzed by χ 2 test. Survival rates of rats were estimated using the Kaplan-Meier method and analyzed using the log-rank test (Stata 8.0, Stata Corp., College Station, TX).…”
Section: Discussionmentioning
confidence: 99%
“…Nutrition and Cancer 2005 At 50 days, all rats were given 10 mg 7,12-dimethylbenzanthracene dissolved in 1 ml sesame oil by gastric infusion, and then the tumor incidence and total number of mammary tumors in each group were tested using the fourfold contingency table (22) and analyzed using the χ 2 test; *P < 0.05. (B) Survival rates were estimated using the Kaplan-Meier method and analyzed using the log-rank test.…”
mentioning
confidence: 99%
“…The x's appearing in the table mean that the critical value obtained by chi-square was zero whereas no value would yield significance if the charts were used. For the special case where N2=N1 a direct comparison can also be made with Fisher's exact test which has been extensively tabulated by Swaroop and others [10,6]. Since both the exact test and the chi-square test gave identical results we did not bother tabulating separately the differences for the exact test.…”
Section: Illustrative Examplesmentioning
confidence: 99%
“…It becomes a burdensome chore to perform the hundreds of chi-square tests that a conscientious research worker sometimes feels are necessary. Various shortcut procedures have been devised to meet this particular problem; for example, there are extensive tabulations of Fisher's exact test [3,4,6,10] as well as various nomograms and other devices. The principal difficulty with the published tables is that multiple entries are necessary.…”
Section: The Problemmentioning
confidence: 99%