Preface |
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xi | |
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1 | (16) |
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1 | (1) |
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1.2 Confounding, Mediation and Effect Modification |
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2 | (1) |
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3 | (2) |
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5 | (1) |
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1.5 Results of Fitting Models |
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6 | (1) |
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7 | (1) |
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8 | (1) |
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1.8 Statistical Tests Using Models |
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8 | (1) |
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9 | (1) |
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1.10 Model Fitting and Analysis: Exploratory and Confirmatory Analyses |
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10 | (1) |
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1.11 Computer-intensive Methods |
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11 | (1) |
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11 | (11) |
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22 | (1) |
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22 | (2) |
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1.15 Reporting Statistical Results in the Medical Literature |
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24 | |
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1.16 Reading Statistics in the Medical Literature |
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14 | (3) |
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2 Multiple Linear Regression |
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17 | (24) |
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17 | (1) |
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2.2 Uses of Multiple Regression |
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18 | (1) |
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2.3 Two Independent Variables |
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18 | (5) |
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2.3.1 One Continuous and One Binary Independent Variable |
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19 | (3) |
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2.3.2 Two Continuous Independent Variables |
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22 | (1) |
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2.3.3 Categorical Independent Variables |
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22 | (1) |
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2.4 Interpreting a Computer Output |
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23 | (8) |
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2.4.1 One Continuous Variable |
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24 | (1) |
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2.4.2 One Continuous Variable and One Binary Independent Variable |
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25 | (1) |
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2.4.3 One Continuous Variable and One Binary Independent Variable with Their Interaction |
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26 | (1) |
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2.4.4 Two Independent Variables: Both Continuous |
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27 | (2) |
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2.4.5 Categorical Independent Variables |
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29 | (2) |
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2.5 Examples in the Medical Literature |
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31 | (1) |
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2.5.1 Analysis of Covariance: One Binary and One Continuous Independent Variable |
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31 | (1) |
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2.5.2 Two Continuous Independent Variables |
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32 | (1) |
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2.6 Assumptions Underlying the Models |
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32 | (1) |
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33 | (2) |
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2.7.1 Residuals, Leverage and Influence |
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33 | (1) |
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2.7.2 Computer Analysis: Model Checking and Sensitivity |
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34 | (1) |
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35 | (1) |
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2.9 Reporting the Results of a Multiple Regression |
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36 | (1) |
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2.10 Reading about the Results of a Multiple Regression |
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36 | (1) |
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2.11 Frequently Asked Questions |
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37 | (1) |
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2.12 Exercises: Reading the Literature |
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38 | (3) |
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3 Multiple Logistic Regression |
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41 | (24) |
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41 | (1) |
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42 | (2) |
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3.2.1 Categorical Covariates |
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44 | (1) |
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44 | (2) |
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45 | (1) |
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3.3.2 "Extra-binomial" Variation or "Over Dispersion" |
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45 | (1) |
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3.3.3 The Logistic Transform is Inappropriate |
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46 | (1) |
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3.4 Uses of Logistic Regression |
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46 | (1) |
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3.5 Interpreting a Computer Output |
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47 | (7) |
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3.5.1 One Binary Independent Variable |
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47 | (4) |
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3.5.2 Two Binary Independent Variables |
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51 | (2) |
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3.5.3 Two Continuous Independent Variables |
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53 | (1) |
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3.6 Examples in the Medical Literature |
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54 | (2) |
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55 | (1) |
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56 | (1) |
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3.8 Interpreting Computer Output: Unmatched Case-control Study |
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56 | (2) |
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3.9 Matched Case-control Studies |
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58 | (1) |
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3.10 Interpreting Computer Output: Matched Case-control Study |
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58 | (2) |
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3.11 Example of Conditional Logistic Regression in the Medical Literature |
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60 | (1) |
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60 | (1) |
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3.12 Alternatives to Logistic Regression |
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61 | (1) |
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3.13 Reporting the Results of Logistic Regression |
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61 | (1) |
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3.14 Reading about the Results of Logistic Regression |
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61 | (1) |
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3.15 Frequently Asked Questions |
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62 | (1) |
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62 | (3) |
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65 | (14) |
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65 | (1) |
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66 | (2) |
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4.3 Uses of Cox Regression |
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68 | (1) |
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4.4 Interpreting a Computer Output |
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68 | (2) |
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4.5 Interpretation of the Model |
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70 | (1) |
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4.6 Generalisations of the Model |
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70 | (2) |
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70 | (1) |
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4.6.2 Time Dependent Covariates |
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71 | (1) |
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4.6.3 Parametric Survival Models |
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71 | (1) |
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71 | (1) |
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72 | (1) |
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4.8 Reporting the Results of a Survival Analysis |
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73 | (1) |
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4.9 Reading about the Results of a Survival Analysis |
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74 | (1) |
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4.10 Example in the Medical Literature |
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74 | (2) |
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75 | (1) |
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4.11 Frequently Asked Questions |
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76 | (1) |
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77 | (2) |
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79 | (16) |
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79 | (1) |
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5.2 Models for Random Effects |
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80 | (1) |
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5.3 Random vs Fixed Effects |
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81 | (1) |
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5.4 Use of Random Effects Models |
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81 | (3) |
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5.4.1 Cluster Randomised Trials |
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81 | (1) |
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82 | (1) |
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83 | (1) |
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5.4.4 Multi-centre Trials |
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83 | (1) |
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5.5 Ordinary Least Squares at the Group Level |
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84 | (1) |
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5.6 Interpreting a Computer Output |
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85 | (4) |
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5.6.1 Different Methods of Analysis |
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85 | (1) |
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85 | (1) |
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5.6.3 Interpreting Computer Output |
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86 | (3) |
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89 | (1) |
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5.8 Reporting the Results of Random Effects Analysis |
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89 | (1) |
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5.9 Reading about the Results of Random Effects Analysis |
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90 | (1) |
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5.10 Examples of Random Effects Models in the Medical Literature |
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90 | (1) |
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90 | (1) |
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91 | (1) |
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91 | (1) |
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5.10.4 Clustering in a Cohort Study |
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91 | (1) |
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91 | (1) |
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5.11 Frequently Asked Questions |
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91 | (1) |
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92 | (3) |
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6 Poisson and Ordinal Regression |
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95 | (12) |
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95 | (1) |
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95 | (1) |
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6.3 Interpreting a Computer Output: Poisson Regression |
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96 | (1) |
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6.4 Model Checking for Poisson Regression |
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97 | (2) |
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6.5 Extensions to Poisson Regression |
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99 | (1) |
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6.6 Poisson Regression Used to Estimate Relative Risks from a 2 × 2 Table |
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99 | (1) |
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6.7 Poisson Regression in the Medical Literature |
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100 | (1) |
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100 | (1) |
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6.9 Interpreting a Computer Output: Ordinal Regression |
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101 | (2) |
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6.10 Model Checking for Ordinal Regression |
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103 | (1) |
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6.11 Ordinal Regression in the Medical Literature |
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104 | (1) |
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6.12 Reporting the Results of Poisson or Ordinal Regression |
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104 | (1) |
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6.13 Reading about the Results of Poisson or Ordinal Regression |
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104 | (1) |
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6.14 Frequently Asked Question |
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105 | (1) |
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105 | (2) |
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107 | (14) |
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107 | (1) |
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1.2 Models for Meta-analysis |
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108 | (3) |
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111 | (1) |
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7.4 Displaying the Results of a Meta-analysis |
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111 | (2) |
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7.5 Interpreting a Computer Output |
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113 | (1) |
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7.6 Examples from the Medical Literature |
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114 | (1) |
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7.6.1 Example of a Meta-analysis of Clinical Trials |
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114 | (1) |
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7.6.2 Example of a Meta-analysis of Case-control Studies |
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115 | (1) |
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1.1 Reporting the Results of a Meta-analysis |
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115 | (1) |
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7.8 Reading about the Results of a Meta-analysis |
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116 | (1) |
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7.9 Frequently Asked Questions |
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116 | (2) |
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118 | (3) |
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121 | (8) |
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121 | (1) |
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122 | (1) |
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8.3 Estimation Using Correlated Residuals |
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122 | (1) |
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8.4 Interpreting a Computer Output: Time Series Regression |
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123 | (1) |
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8.5 Example of Time Series Regression in the Medical Literature |
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124 | (1) |
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8.6 Reporting the Results of Time Series Regression |
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125 | (1) |
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8.7 Reading about the Results of Time Series Regression |
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125 | (1) |
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8.8 Frequently Asked Questions |
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125 | (1) |
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126 | (3) |
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Appendix 1 Exponentials and Logarithms |
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129 | (4) |
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Appendix 2 Maximum Likelihood and Significance Tests |
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133 | (10) |
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A2.1 Binomial Models and Likelihood |
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133 | (2) |
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135 | (1) |
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135 | (2) |
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A2.4 Hypothesis Testing: the Likelihood Ratio Test |
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137 | (1) |
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138 | (1) |
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138 | (1) |
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A2.7 Which Method to Choose? |
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139 | (1) |
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A2.8 Confidence Intervals |
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139 | (1) |
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A2.9 Deviance Residuals for Binary Data |
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140 | (1) |
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A2.10 Example: Derivation of the Deviances and Deviance Residuals Given in Table 3.3 |
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140 | (3) |
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140 | (1) |
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140 | (3) |
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Appendix 3 Bootstrapping and Variance Robust Standard Errors |
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143 | (8) |
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143 | (1) |
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A3.2 Example of the Bootstrap |
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144 | (1) |
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A3.3 Interpreting a Computer Output: The Bootstrap |
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145 | (1) |
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A3.3.1 Two-sample T-test with Unequal Variances |
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145 | (1) |
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A3.4 The Bootstrap in the Medical Literature |
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145 | (1) |
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A3.5 Robust or Sandwich Estimate SEs |
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146 | (1) |
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A3.6 Interpreting a Computer Output: Robust SEs for Unequal Variances |
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147 | (2) |
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A3.7 Other Uses of Robust Regression |
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149 | (1) |
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A3.8 Reporting the Bootstrap and Robust SEs in the Literature |
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149 | (1) |
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A3.9 Frequently Asked Question |
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150 | (1) |
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Appendix 4 Bayesian Methods |
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151 | (6) |
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151 | (1) |
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A4.2 Uses of Bayesian Methods |
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152 | (1) |
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153 | (1) |
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A4.4 Reading and Reporting Bayesian Methods in the Literature |
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154 | (1) |
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A4.5 Reading about the Results of Bayesian Methods in the Medical Literature |
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154 | (3) |
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157 | (22) |
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157 | (6) |
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163 | (3) |
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166 | (2) |
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168 | (2) |
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170 | (1) |
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171 | (2) |
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173 | (1) |
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A5.9 R Code for Appendix 1 |
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173 | (1) |
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A5.10 R Code for Appendix 2 |
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174 | (1) |
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A5.11 R Code for Appendix 3 |
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175 | (4) |
Answers to Exercises |
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179 | (6) |
Glossary |
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185 | (6) |
Index |
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191 | |