charts and charting. See also graphing

bar and pie, 113, 126

boxandwhiskers,

127–128

categorical data, 112–114

correlation coefficients, 202–203

hazard rates and survival probabilities, 312–315

multiple regression, 243–254

numerical data, 124–128

Poisson regression, 273–276

Receiver Operator Characteristics (ROC), 264–265

residuals, 222–223

scatter plots, 214, 219, 221, 238–240

software for, 57–58

sshaped data,

252–256

student t test, 45–47

CHD (coronary heart disease), 92–93

chemotherapy, 337

chisquare distribution,

165–166, 358–359

chisquare test

pros and cons, 167–169

sample size, 171–172

tables, 13

using, 11, 161–167, 174

chronic obstructive pulmonary disease (COPD), 302

CI (confidence interval)

calculating, 226

definition of, 10, 39, 130–131

using, 131–138, 183, 194–197

CIR (cumulative incidence rate), 178–179

CL (confidence level), 39

CL (confidence limits), 130, 134

classification tables, 262–264

ClinCalc, 172

clinical center variable, 338