Logistic Regression: A Self-learning Text, Third Edition (Statistics in the Health Sciences)

Chapter 5 1. Conditional ML estimation is the appropriate method of estimation because the study involves matching. Age and soc ...

Wald statistic:Z¼ ^bSMKNS s^bSMKNS, which is approximately normal (0, 1) underH 0 , or alternatively, Z^2 is approximately chi ...

Model II is more appropriate than Model I if the test for the effect of interaction is viewed as significant. Otherwise, Model ...

any further model considered. TheVvariables that must remain in further models are NS, AS, NSAS, and, of course, the exposure v ...

intervals for the gold standard odds ratio and the odds ratio for the model that drops NSAS. If the latter confidence interval ...

logit PðXÞ¼aþb 1 Fþb 2 BASEþg 1 POST þg 2 PFþg 3 OCCþg 4 AGEþg 5 GEN þd 1 FBASEþd 2 FPOST þd 3 FPFþd 4 FOCCþd 5 FAGE þd 6 ...

a. Seven subsets of possible confounders other than all confounders (in the gold standard model): {AGE, GEN}, {AGE, PF}, {PF, G ...

c. Yes. The high VDP value onF 3 BASEsuggests that this product term is involved in a collinearity problem. Such a problem was n ...

No. The model is not fully parameterized, since it contains five parameters whereas the number of covariate patterns is 186. No ...

d. For group 5, term involving cases: (109.98)^2 /9.98¼0.00004 term involving noncases: (2020.02)^2 /20.02¼0.00002 e. 20 terms ...

b. Sensitivity %¼100(98/114)¼86.0 Specificity %¼100(107/175)¼61.1 1 specificity %¼ 100 61.1¼100(68/175)¼39.9 False positive %¼ ...

a. 0.0 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 Sensitivity1.0 1–specificity b. AUC¼c¼0 ...

uniformly distributed over the deciles. In contrast, good discrimination would be indicated by an increasing trend in the observ ...

Association of Predicted Probabilities and Observed Responses Percent Concordant 65.2 Somers’ D 0.518 Percent Discordant 13.4 Ga ...

Chapter 12 True-False Questions: F: The outcome categories are not ordered. T T F: There will be four estimated coefficients fo ...

effect on the parameter estimates or on which odds ratios are assumed invariant. Changing the values of the independent variable ...

Note: varð^b 1 þ^b 3 Þ¼varð^b 1 Þþvarð^b 3 Þþ 2 covðb^ 1 ;^b 3 Þ. See Chap. 5. The working covariance matrix pertains to the co ...

model (a marginal model) is that it is the ratio of the odds of a population average. The variable SEQUENCE does not change val ...

Bibliography Anath, C.V., and Kleinbaum, D.G., Regression models for ordinal responses: A review of methods and applications,Int ...

*Donavan, J.W., MacLennan, R., and Adena, M., Vietnam service and the risk of congenital anomalies. A case-control study.Med. J. ...