SUBJECT INDEX 355 ordinal versus nominal treatment of data, 41–45, 118–119 quasi symmetry, 258–260 scores, choice of, 43–44, 119, 195 testing independence, 41–45, 232 trend in proportions, 41–45 Ordinal quasi symmetry, 258–260 Overdispersion, 80–84, 192–193, 280, 283–284, 304–305 Paired comparisons, 264–266 Parameter constraints, 113, 206, 221 Partial association, 49 partial table, 49 same as marginal association, 224 Partitioning chi-squared, 39–40, 62, 329 Pearson chi-squared statistic, 35, 37, 61 chi-squared distribution, 35–36 comparing proportions, 26 degrees of freedom, 35, 37, 62, 327 goodness of fit, 86, 145–147, 184, 212 independence, 35–38, 41–43, 61, 333 loglinear model, 212 and residuals, 86–87, 148 sample size for chi-squared approximation, 40, 156–157, 329 sample size, influence on statistic, 61 two-by-two tables, 26, 40 Pearson, Karl, 325–327 Pearson residual, 86–87, 148 Binomial GLM, 148 GLM, 86–87 independence, 38–39 Poisson GLM, 87 Penalized quasi likelihood (PQL), 317 Perfect discrimination, 153 Poisson distribution, 74 mean and standard deviation, 74 negative binomial, connection with, 81 overdispersion, 80–84 generalized linear mixed model, 324 Poisson loglinear model, 75, 205, 324 Poisson regression, 75–84 residuals, 87 Poisson GLM, 74–84, 205, 334–335 Population-averaged effect, 249, 279 Power, 160–162 Practical vs. statistical significance, 61, 140, 218–219 Prior distribution, 317 Probability estimates, 6, 68, 100, 108–109, 176, 245 Probit model, 72–73, 135, 328 Proportional odds model, 182 See also Cumulative logit model Proportions Bayesian estimate, 17 confidence intervals, 9–10, 20, 26 dependent, 34, 244–252 difference of, 26–27, 246–247 estimating using models, 68, 100, 108, 176 independent, 26 inference, 6–16, 26–31 ratio of (relative risk), 27–28, 32 as sample mean, 7 significance tests, 8, 13–16, 19 standard error, 8, 19, 26 P -value and Type I error probability, 14, 20, 47–48 Quasi independence, 261–263, 274, 329 Quasi likelihood, 280 Quasi symmetry, 257–259, 263, 265, 274, 340 R (software). See www.stat.ufl.edu/∼aa/cda/ software.html Random component (GLM), 66 Random effects, 298–318, 341–342 bivariate, 311–313 predicting, 299, 303, 313, 316 Random intercept, 298 Ranks, 44–45 Rasch model, 307, 328 Rater agreement, 260–264 Rates, 82–84, 97 Receiver operating characteristic (ROC) curve, 143–144 Regressive-logistic model, 288–289 Relative risk, 27–28, 32, 328 confidence interval, 28, 58 and odds ratio, 32, 33 Repeated response data, 276
356 SUBJECT INDEX Residuals binomial GLM, 148 deviance, 87 GLM, 86–87 independence, 38–39, 261 Pearson, 86–87, 148 standardized, 38–39, 148, 213–214, 257, 261 Response variable, 2 Retrospective study, 33, 105 ROC curve, 143–144 Sample size determination, 160–162 Sampling zero, 154 SAS, 332–342 CATMOD, 338 FREQ, 333–334, 338 GENMOD, 334–341 LOGISTIC, 335–337 NLMIXED, 341–342 Saturated model generalized linear model, 85 logistic regression, 145–146, 157, 167 loglinear model, 206–208 Scores, choice of, 43–45, 119, 195 Score confidence interval, 10, 12, 19, 20 Score test, 12, 19, 36, 89, 115, 284 Sensitivity, 23–24, 55, 142 Significance, statistical versus practical, 61, 140, 218–219 Simpson’s paradox, 51–53, 63, 150, 235, 326 Small-area estimation, 302–304 Small samples: binomial inference, 13–16 conservative inference, 14, 47–48, 160 exact inference, 45–48, 63, 157–160 infinite parameter estimates, 89, 152–156, 160 X 2 and G 2 , 40, 156–157 zero counts, 154, 159 Smoothing, 78–79, 101–102 Sparse tables, 152–160 Spearman’s rho, 44 Specificity, 23–24, 55, 142 SPlus (software), see www.stat.ufl.edu/∼aa/cda/ software.html SPSS, see http://www.stat.ufl.edu/∼aa/cda/ software.html Square tables, 252–264 Standardized coefficients, 121 Standardized residuals, 38, 87, 148, 213–214, 336 binomial GLMs, 148 GLMs, 87 for independence, 38–39, 261 and Pearson statistic, 214 for Poisson GLMs, 213–214 for symmetry, 257 Stata (software), see http://www.stat.ufl.edu/∼aa/cda/ software.html StatXact, 48, 157, 159, 160, 328, 332 Stepwise model-building, 139–142, 226 Subject-specific effect, 249, 279 Symmetry, 256–258, 274 Systematic component (GLM), 66 Three-fac<strong>to</strong>r interaction, 215, 218 Three-way tables, 49–54, 110–115, 208–215 Tolerance distribution, 73 Transitional model, 288–290 Trend test, 41–45, 195 Uniform association model, 230 Variance component, 298, 309, 313, 317–318 Wald confidence interval, 12, 19, 26 Wald test, 11–13, 19, 84, 89, 107, 284 Weighted least squares, 88 Wilcoxon test, 45 Working correlation, 281 X 2 statistic, 35, 145. See also Pearson chi-squared statistic Yule, G. Udny, 325–326 Zero cell count, 31, 152–156, 159
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An Introduction to Categorical Data
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Copyright © 2007 by John Wiley & S
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vi CONTENTS 2.1.3 Sensitivity and S
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Preface to the Second Edition In re
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