Flexible parametric survival analysis using Stata: beyond the Cox model
Gespeichert in:
| Hauptverfasser: | , |
|---|---|
| Format: | Buch |
| Sprache: | English |
| Veröffentlicht: |
College Station, Texas
Stata Press
2011
|
| Schriftenreihe: | A Stata Press publication
|
| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | xxvi, 347 Seiten Diagramme |
| ISBN: | 9781597180795 1597180793 |
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| 100 | 1 | |a Royston, Patrick |e Verfasser |4 aut | |
| 245 | 1 | 0 | |a Flexible parametric survival analysis using Stata |b beyond the Cox model |c Patrick Royston, Paul C. Lambert |
| 264 | 1 | |a College Station, Texas |b Stata Press |c 2011 | |
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Datensatz im Suchindex
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| adam_text | Titel: Flexible parametric survival analysis using stata
Autor: Royston, Patrick
Jahr: 2011
Contents
List of tables xiii
List of figures xv
Preface xxv
Introduction 1
1.1 Goals.................................... 1
1.2 A brief review of the Cox proportional hazards model ........ 2
1.3 Beyond the Cox model.......................... 2
1.3.1 Estimating the baseline hazard................ 2
1.3.2 The baseline hazard contains useful information....... 5
1.3.3 Advantages of smooth survival functions........... 8
1.3.4 Some requirements of a practical survival analysis...... 9
1.3.5 When the proportional-hazards assumption is breached ... 10
1.4 Why parametric models?......................... 13
1.4.1 Smooth baseline hazard and survival functions........ 13
1.4.2 Time-dependent HRs...................... 13
1.4.3 Modeling on different scales.................. 13
1.4.4 Relative survival ........................ 13
1.4.5 Prediction out of sample.................... 14
1.4.6 Multiple time scales....................... 14
1.5 Why not standard parametric models?................. 14
1.6 A brief introduction to stpm2...................... 16
1.6.1 Estimation (model fitting)................... 16
1.6.2 Postestimation facilities (prediction) ............. 17
1.7 Basic relationships in survival analysis................. 17
1.8 Comparing models............................ 18
1.9 The delta method............................. 19
1.10 Ado-file resources............................. 20
1.11 How our book is organized........................ 21
Using stset and stsplit 23
2.1 What is the stset command?....................... 23
2.2 Some key concepts............................ 23
2.3 Syntax of the stset command...................... 24
2.4 Variables created by the stset command................ 25
2.5 Examples of using stset ......................... 25
2.5.1 Standard survival data..................... 26
2.5.2 Using the scale() option.................... 27
2.5.3 Date of diagnosis and date of exit............... 27
2.5.4 Date of diagnosis and date of exit with the scale() option . 28
2.5.5 Restricting the follow-up time................. 29
2.5.6 Left-truncation......................... 31
2.5.7 Age as the time scale...................... 32
2.6 The stsplit command........................... 33
2.6.1 Time-dependent effects..................... 33
2.6.2 Time-varying covariates .................... 34
2.7 Conclusion................................. 35
Graphical introduction to the principal datasets 37
3.1 Introduction................................ 37
3.2 Rotterdam breast cancer data...................... 37
3.3 England and Wales breast cancer data................. 39
3.4 Orchiectomy data............................. 42
3.5 Conclusion................................. 45
Poisson models 47
4.1 Introduction................................ 47
4.2 Modeling rates with the Poisson distribution .............. 48
4.3 Splitting the time scale.......................... 50
4.3.1 The piecewise exponential model............... 53
4.3.2 Time as just another covariate................. 57
4.4 Collapsing the data to speed up computation............. 57
4.5 Splitting at unique failure times..................... 59
4.5.1 Technical note: Why the Cox and Poisson approaches are
equivalent*............................ 61
4.6 Comparing a different number of intervals............... 62
4.7 Fine splitting of the time scale ..................... 66
4.8 Splines: Motivation and definition ................... 67
4.8.1 Calculating splines*....................... 69
4.8.2 Restricted cubic splines..................... 70
4.8.3 Splines: Application to the Rotterdam data......... 71
4.8.4 Varying the number of knots.................. 74
4.8.5 Varying the location of the knots............... 78
4.8.6 Estimating the survival function*............... 79
4.9 FPs: Motivation and definition..................... 81
4.9.1 Application to Rotterdam data................ 83
4.9.2 Higher order FP models.................... 87
4.9.3 FP function selection procedure................ 89
4.10 Discussion................................. 90
Royston?Parmar models 91
5.1 Motivation and introduction....................... 92
5.1.1 The exponential distribution.................. 92
5.1.2 The Weibull distribution.................... 95
5.1.3 Generalizing the Weibull.................... 96
5.1.4 Estimating the hazard function................ 100
5.2 Proportional hazards models ...................... 101
5.2.1 Generalizing the Weibull.................... 101
5.2.2 Example............................. 103
5.2.3 Comparing parameters of PH(1) and Weibull models .... 104
5.3 Selecting a spline function........................ 108
5.3.1 Knot positions.......................... 108
Example............................. 109
5.3.2 How many knots?........................ 110
5.4 PO models ................................ HI
5.4.1 Introduction........................... Ill
5.4.2 The loglogistic model...................... 112
5.4.3 Generalizing the loglogistic model............... 113
5.4.4 Comparing parameters of PO(l) and loglogistic models . . . 113
Example............................. 114
5.5 Probit models............................... 114
5.5.1 Motivation............................ 114
5.5.2 Generalizing the probit model................. 115
5.5.3 Comparing parameters of probit(l) and lognormal models . 116
5.5.4 Comments on probit and POs models............. 117
5.6 Royston-Parmar (RP) models...................... 118
5.6.1 Models with 6 not equal to 0 or 1............... 119
5.6.2 Example............................. 119
5.6.3 Likelihood function and parameter estimation* ....... 120
5.6.4 Comparing regression coefficients............... 121
5.6.5 Model selection......................... 121
5.6.6 Sensitivity to number of knots................. 122
5.6.7 Sensitivity to location of knots ................ 123
5.7 Concluding remarks ........................... 124
Prognostic models 125
6.1 Introduction................................ 125
6.2 Developing and reporting a prognostic model............. 126
6.3 What does the baseline hazard function mean?............ 127
6.3.1 Example............................. 128
6.4 Model selection.............................. 129
6.4.1 Choice of scale and baseline complexity............ 130
Example............................. 130
6.4.2 Selection of variables and functional forms.......... 131
Example............................. 132
6.5 Quantitative outputs from the model.................. 134
6.5.1 Survival probabilities for individuals ............. 134
6.5.2 Survival probabilities across the risk spectrum........ 137
6.5.3 Survival probabilities at given covariate values........ 138
6.5.4 Survival probabilities in groups................ 140
6.5.5 Plotting adjusted survival curves............... 142
6.5.6 Plotting differences between survival curves......... 143
6.5.7 Centiles of the survival distribution.............. 145
6.6 Goodness of fit.............................. 147
6.6.1 Example............................. 148
6.7 Discrimination and explained variation................. 149
6.7.1 Example............................. 151
6.7.2 Harrell s C index of concordance ............... 152
6.8 Out-of-sample prediction: Concept and applications ......... 153
6.8.1 Extrapolation of survival functions: Basic technique .... 153
6.8.2 Extrapolation of survival functions: Further investigations . 155
6.8.3 Validation of prognostic models: Basics............ 157
6.8.4 Validation of prognostic models: Further comments..... 160
6.9 Visualization of survival times...................... 161
6.9.1 Example............................. 161
6.10 Discussion................................. 164
Time-dependent effects 167
7.1 Introduction................................ 167
7.2 Definitions................................. 168
7.3 What do we mean by a TD effect?................... 169
7.4 Proportional on which scale? ...................... 176
7.5 Poisson models with TD effects..................... 179
7.5.1 Piecewise models........................ 180
7.5.2 Using restricted cubic splines ................. 184
7.6 RP models with TD effects....................... 190
7.6.1 Piecewise HRs.......................... 190
7.6.2 Continuous TD effects..................... 193
7.6.3 More than one TD effect.................... 201
7.6.4 Stratification is the same as including TD effects...... 203
7.7 TD effects for continuous variables................... 205
7.8 Attained age as the time scale...................... 211
7.8.1 The orchiectomy data ..................... 211
7.8.2 Proportional hazards model.................. 212
7.8.3 TD model............................ 214
7.9 Multiple time scales ........................... 218
7.10 Prognostic models with TD effects................... 219
7.10.1 Example............................. 220
7.11 Discussion................................. 224
Relative survival 227
8.1 Introduction................................ 227
8.2 What is relative survival?........................ 227
8.3 Excess mortality and relative survival ................. 228
8.3.1 Excess mortality ........................ 228
8.3.2 Relative survival is a ratio................... 230
8.4 Motivating example............................ 231
8.5 Life-table estimation of relative survival................ 233
8.5.1 Using strs............................ 234
8.6 Poisson models for relative survival...................235
8.6.1 Piecewise models........................235
8.6.2 Restricted cubic splines.....................241
8.7 RP models for relative survival..................... 246
8.7.1 Likelihood for relative survival models............ 247
8.7.2 Proportional cumulative excess hazards............ 247
8.7.3 RP models on other scales................... 248
8.7.4 Application to England and Wales breast cancer data .... 248
8.7.5 Relative survival models on other scales........... 250
8.7.6 Time-dependent effects..................... 253
8.8 Some comments on model selection................... 259
8.9 Age as a continuous variable....................... 267
8.10 Concluding remarks ........................... 272
Further topics 273
9.1 Introduction................................ 273
9.2 Number needed to treat......................... 273
9.2.1 Example............................. 274
9.3 Average and adjusted survival curves.................. 275
9.3.1 Renal data............................ 277
9.4 Modeling distributions with RP models ................ 283
9.4.1 Example 1: Rotterdam breast cancer data.......... 283
9.4.2 Example 2: CD4 lymphocyte data .............. 285
9.4.3 Example 3: Prostate cancer data............... 294
9.5 Multiple events.............................. 296
9.5.1 Introduction........................... 296
9.5.2 The AG model ......................... 297
9.5.3 The WLW model........................ 298
9.5.4 The PWP model........................ 298
9.5.5 Multiple events in RP models................. 298
9.5.6 Summary ............................ 304
9.6 Bayesian RP models........................... 304
9.6.1 Introduction........................... 304
9.6.2 The zeros trick in WinBUGS................ 305
9.6.3 Fitting a RP model....................... 305
9.6.4 Summary ............................ 310
9.7 Competing risks.............................. 310
9.7.1 Summary ............................ 316
9.8 Period analysis.............................. 317
9.8.1 Introduction........................... 317
9.8.2 What is period analysis?.................... 317
9.8.3 Application to England and Wales breast cancer data .... 319
9.9 Crude probability of death from relative survival models....... 322
9.9.1 Introduction........................... 322
9.9.2 Application to England and Wales breast cancer data .... 323
9.9.3 Conclusion............................ 329
9.10 Final remarks............................... 329
References 331
Author index 341
Subject index 345
|
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| spelling | Royston, Patrick Verfasser aut Flexible parametric survival analysis using Stata beyond the Cox model Patrick Royston, Paul C. Lambert College Station, Texas Stata Press 2011 xxvi, 347 Seiten Diagramme txt rdacontent n rdamedia nc rdacarrier A Stata Press publication Ereignisdatenanalyse (DE-588)4132103-0 gnd rswk-swf Parametrisches Verfahren (DE-588)4205938-0 gnd rswk-swf Stata (DE-588)4617285-3 gnd rswk-swf Ereignisdatenanalyse (DE-588)4132103-0 s Parametrisches Verfahren (DE-588)4205938-0 s Stata (DE-588)4617285-3 s DE-604 Lambert, Paul C. Verfasser (DE-588)1063215099 aut HBZ Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=024557844&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Royston, Patrick Lambert, Paul C. Flexible parametric survival analysis using Stata beyond the Cox model Ereignisdatenanalyse (DE-588)4132103-0 gnd Parametrisches Verfahren (DE-588)4205938-0 gnd Stata (DE-588)4617285-3 gnd |
| subject_GND | (DE-588)4132103-0 (DE-588)4205938-0 (DE-588)4617285-3 |
| title | Flexible parametric survival analysis using Stata beyond the Cox model |
| title_auth | Flexible parametric survival analysis using Stata beyond the Cox model |
| title_exact_search | Flexible parametric survival analysis using Stata beyond the Cox model |
| title_full | Flexible parametric survival analysis using Stata beyond the Cox model Patrick Royston, Paul C. Lambert |
| title_fullStr | Flexible parametric survival analysis using Stata beyond the Cox model Patrick Royston, Paul C. Lambert |
| title_full_unstemmed | Flexible parametric survival analysis using Stata beyond the Cox model Patrick Royston, Paul C. Lambert |
| title_short | Flexible parametric survival analysis using Stata |
| title_sort | flexible parametric survival analysis using stata beyond the cox model |
| title_sub | beyond the Cox model |
| topic | Ereignisdatenanalyse (DE-588)4132103-0 gnd Parametrisches Verfahren (DE-588)4205938-0 gnd Stata (DE-588)4617285-3 gnd |
| topic_facet | Ereignisdatenanalyse Parametrisches Verfahren Stata |
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