Contributors |
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xiii | |
Preface |
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xxiii | |
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1 | (432) |
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3 | (10) |
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1.1 Why do a systematic review? |
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3 | (1) |
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1.2 What is the review question? |
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4 | (1) |
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1.3 Who should do a systematic review? |
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5 | (2) |
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1.4 The importance of reliability |
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7 | (1) |
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8 | (3) |
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1.6 Data management and quality assurance |
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11 | (1) |
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12 | (1) |
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12 | (1) |
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2 Determining the scope of the review and the questions it will address |
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13 | (20) |
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2.1 Rationale for well-formulated questions |
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13 | (2) |
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2.2 Aims of reviews of interventions |
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15 | (1) |
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2.3 Defining the scope of a review question |
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16 | (5) |
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2.4 Ensuring the review addresses the right questions |
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21 | (3) |
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2.5 Methods and tools for structuring the review |
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24 | (5) |
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29 | (1) |
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29 | (4) |
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3 Defining the criteria for including studies and how they will be grouped for the synthesis |
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33 | (34) |
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33 | (2) |
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3.2 Articulating the review and comparison PICO |
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35 | (16) |
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3.3 Determining which study designs to include |
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51 | (9) |
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3.4 Eligibility based on publication status and language |
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60 | (1) |
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61 | (1) |
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61 | (6) |
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4 Searching for and selecting studies |
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67 | (42) |
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68 | (1) |
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68 | (2) |
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70 | (9) |
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4.4 Designing search strategies |
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79 | (11) |
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4.5 Documenting and reporting the search process |
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90 | (2) |
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92 | (7) |
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99 | (1) |
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99 | (10) |
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109 | (34) |
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109 | (1) |
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110 | (4) |
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114 | (11) |
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5.4 Data collection tools |
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125 | (5) |
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5.5 Extracting data from reports |
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130 | (6) |
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5.6 Extracting study results and converting to the desired format |
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136 | (1) |
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5.7 Managing and sharing data |
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136 | (1) |
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137 | (1) |
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137 | (6) |
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6 Choosing effect measures and computing estimates of effect |
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143 | (34) |
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6.1 Types of data and effect measures |
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143 | (2) |
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6.2 Study designs and identifying the unit of analysis |
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145 | (3) |
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6.3 Extracting estimates of effect directly |
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148 | (2) |
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6.4 Dichotomous outcome data |
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150 | (6) |
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6.5 Continuous outcome data |
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156 | (12) |
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6.6 Ordinal outcome data and measurement scales |
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168 | (2) |
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170 | (2) |
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172 | (1) |
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6.9 Conditional outcomes only available for subsets of participants |
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173 | (1) |
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174 | (1) |
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174 | (3) |
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7 Considering bias and conflicts of interest among the included studies |
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177 | (28) |
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177 | (3) |
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7.2 Empirical evidence of bias |
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180 | (5) |
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7.3 General procedures for risk-of-bias assessment |
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185 | (3) |
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7.4 Presentation of assessment of risk of bias |
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188 | (1) |
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7.5 Summary assessments of risk of bias |
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188 | (2) |
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7.6 Incorporating assessment of risk of bias into analyses |
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190 | (2) |
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7.7 Considering risk of bias due to missing results |
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192 | (1) |
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7.8 Considering source of funding and conflict of interest of authors of included studies |
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193 | (6) |
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199 | (1) |
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199 | (6) |
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8 Assessing risk of bias in a randomized trial |
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205 | (24) |
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205 | (1) |
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206 | (6) |
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8.3 Bias arising from the randomization process |
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212 | (2) |
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8.4 Bias due to deviations from intended interventions |
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214 | (3) |
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8.5 Bias due to missing outcome data |
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217 | (3) |
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8.6 Bias in measurement of the outcome |
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220 | (1) |
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8.7 Bias in selection of the reported result |
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221 | (4) |
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8.8 Differences from the previous version of the tool |
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225 | (1) |
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226 | (1) |
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227 | (2) |
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9 Summarizing study characteristics and preparing for synthesis |
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229 | (12) |
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229 | (1) |
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9.2 A general framework for synthesis |
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230 | (1) |
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9.3 Preliminary steps of a synthesis |
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231 | (7) |
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9.4 Checking data before synthesis |
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238 | (1) |
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238 | (2) |
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240 | (1) |
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240 | (1) |
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10 Analysing data and undertaking meta-analyses |
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241 | (44) |
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242 | (1) |
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10.2 Introduction to meta-analysis |
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242 | (3) |
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10.3 A generic inverse-variance approach to meta-analysis |
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245 | (1) |
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10.4 Meta-analysis of dichotomous outcomes |
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246 | (5) |
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10.5 Meta-analysis of continuous outcomes |
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251 | (3) |
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10.6 Combining dichotomous and continuous outcomes |
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254 | (1) |
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10.7 Meta-analysis of ordinal outcomes and measurement scales |
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255 | (1) |
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10.8 Meta-analysis of counts and rates |
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255 | (1) |
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10.9 Meta-analysis of time-to-event outcomes |
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256 | (1) |
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257 | (8) |
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10.11 Investigating heterogeneity |
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265 | (7) |
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272 | (4) |
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10.13 Bayesian approaches to meta-analysis |
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276 | (1) |
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10.14 Sensitivity analyses |
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277 | (2) |
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279 | (1) |
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280 | (5) |
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11 Undertaking network meta-analyses |
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285 | (36) |
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11.1 What is network meta-analysis? |
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285 | (2) |
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287 | (6) |
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11.3 Planning a Cochrane Review to compare multiple interventions |
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293 | (4) |
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11.4 Synthesis of results |
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297 | (7) |
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11.5 Evaluating confidence in the results of a network meta-analysis |
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304 | (5) |
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11.6 Presenting network meta-analyses |
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309 | (6) |
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315 | (1) |
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316 | (1) |
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316 | (5) |
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12 Synthesizing and presenting findings using other methods |
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321 | (28) |
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12.1 Why a meta-analysis of effect estimates may not be possible |
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321 | (3) |
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12.2 Statistical synthesis when meta-analysis of effect estimates is not possible |
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324 | (6) |
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12.3 Visual display and presentation of the data |
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330 | (3) |
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333 | (12) |
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345 | (1) |
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346 | (3) |
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13 Assessing risk of bias due to missing results in a synthesis |
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349 | (26) |
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350 | (1) |
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13.2 Minimizing risk of bias due to missing results |
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351 | (3) |
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13.3 A framework for assessing risk of bias due to missing results in a synthesis |
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354 | (15) |
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369 | (1) |
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370 | (1) |
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370 | (5) |
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14 Completing `Summary of findings' tables and grading the certainty of the evidence |
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375 | (28) |
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14.1 `Summary of findings' tables |
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375 | (14) |
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14.2 Assessing the certainty or quality of a body of evidence |
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389 | (9) |
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14.3 Describing the assessment of the certainty of a body of evidence using the GRADE framework |
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398 | (1) |
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399 | (1) |
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399 | (4) |
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15 Interpreting results and drawing conclusions |
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403 | (30) |
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403 | (2) |
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15.2 Issues of indirectness and applicability |
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405 | (3) |
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15.3 Interpreting results of statistical analyses |
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408 | (3) |
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15.4 Interpreting results from dichotomous outcomes (including numbers needed to treat) |
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411 | (5) |
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15.5 Interpreting results from continuous outcomes (including standardized mean differences) |
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416 | (6) |
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422 | (5) |
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427 | (1) |
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428 | (5) |
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Part Two Specific perspectives in reviews |
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433 | (114) |
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16 Equity and specific populations |
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435 | (16) |
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16.1 Introduction to equity in systematic reviews |
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435 | (2) |
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16.2 Formulation of the review |
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437 | (4) |
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16.3 Identification of evidence |
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441 | (2) |
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16.4 Appraisal of evidence |
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443 | (1) |
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16.5 Synthesis of evidence |
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443 | (1) |
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16.6 Interpretation of evidence |
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444 | (1) |
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445 | (1) |
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445 | (1) |
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445 | (6) |
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17 Intervention complexity |
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451 | (18) |
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451 | (10) |
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17.2 Formulation of the review |
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461 | (7) |
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17.3 Identification of evidence |
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468 | (1) |
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17 A Appraisal of evidence |
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469 | (10) |
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17.5 Synthesis of evidence |
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469 | (3) |
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17.6 Interpretation of evidence |
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472 | (1) |
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473 | (1) |
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474 | (5) |
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18 Patient-reported outcomes |
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479 | (14) |
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18.1 Introduction to patient-reported outcomes |
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479 | (1) |
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18.2 Formulation of the review |
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480 | (2) |
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18.3 Appraisal of evidence |
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482 | (3) |
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18.4 Synthesis and interpretation of evidence |
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485 | (3) |
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488 | (1) |
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489 | (4) |
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493 | (14) |
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19.1 Introduction to issues in addressing adverse effects |
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493 | (3) |
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19.2 Formulation of the review |
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496 | (4) |
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19.3 Identification of evidence |
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500 | (2) |
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19.4 Appraisal of evidence |
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502 | (1) |
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19.5 Synthesis and interpretation of evidence |
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503 | (1) |
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504 | (1) |
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505 | (2) |
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507 | (18) |
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507 | (5) |
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20.2 Formulation of the review |
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512 | (5) |
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20.3 Identification of evidence |
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517 | (2) |
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20.4 Appraisal of evidence |
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519 | (1) |
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20.5 Synthesis and interpretation of evidence |
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519 | (2) |
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521 | (1) |
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522 | (3) |
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525 | (22) |
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525 | (1) |
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21.2 Designs for synthesizing and integrating qualitative evidence with intervention reviews |
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526 | (1) |
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21.3 Defining qualitative evidence and studies |
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527 | (1) |
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21.4 Planning a qualitative evidence synthesis linked to an intervention review |
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528 | (1) |
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21.5 Question development |
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529 | (1) |
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21.6 Questions exploring intervention implementation |
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530 | (1) |
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21.7 Searching for qualitative evidence |
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531 | (1) |
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21.8 Assessing methodological strengths and limitations of qualitative studies |
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532 | (1) |
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21.9 Selecting studies to synthesize |
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533 | (1) |
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21.10 Selecting a qualitative evidence synthesis and data extraction method |
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534 | (1) |
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534 | (3) |
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21.12 Assessing the confidence in qualitative synthesized findings |
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537 | (1) |
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21.13 Methods for integrating the qualitative evidence synthesis with an intervention review |
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537 | (1) |
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21.14 Reporting the protocol and qualitative evidence synthesis |
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538 | (1) |
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539 | (1) |
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539 | (8) |
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Part Three Further topics |
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547 | (112) |
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22 Prospective approaches to accumulating evidence |
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549 | (20) |
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549 | (1) |
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22.2 Evidence surveillance: active monitoring of the accumulating evidence |
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550 | (4) |
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22.3 Prospectively planned meta-analysis |
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554 | (7) |
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22.4 Statistical analysis of accumulating evidence |
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561 | (3) |
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564 | (1) |
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565 | (4) |
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23 Including variants on randomized trials |
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569 | (26) |
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23.1 Cluster-randomized trials |
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569 | (7) |
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576 | (9) |
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23.3 Studies with more than two intervention groups |
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585 | (5) |
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590 | (1) |
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591 | (4) |
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24 Including non-randomized studies on intervention effects |
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595 | (26) |
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595 | (6) |
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24.2 Developing criteria for including non-randomized studies of interventions |
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601 | (5) |
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24.3 Searching for non-randomized studies of interventions |
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606 | (2) |
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24.4 Selecting studies and collecting data |
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608 | (2) |
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24.5 Assessing risk of bias in non-randomized studies |
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610 | (1) |
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24.6 Synthesis of results from non-randomized studies |
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611 | (3) |
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24.7 Interpretation and discussion |
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614 | (3) |
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617 | (1) |
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617 | (4) |
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25 Assessing risk of bias in a non-randomized study |
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621 | (22) |
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622 | (1) |
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25.2 Biases in non-randomized studies |
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623 | (3) |
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626 | (6) |
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25.4 Risk of bias in follow-up (cohort) studies |
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632 | (3) |
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25.5 Risk of bias in uncontrolled before-after studies (including interrupted time series) |
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635 | (3) |
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25.6 Risk of bias in controlled before-after studies |
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638 | (2) |
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640 | (1) |
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640 | (3) |
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26 Individual participant data |
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643 | (16) |
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643 | (4) |
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647 | (3) |
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26.3 Managing and checking IPD |
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650 | (2) |
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652 | (3) |
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26.5 Reporting IPD reviews |
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655 | (1) |
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26.6 Appraising the quality of IPD reviews |
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655 | (1) |
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655 | (1) |
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655 | (4) |
Index |
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