# Analyzing the Scientific Evolution of the Sustainable Development Goals
## 3 Results
### Bibliometric Analysis: Science Mapping and Performance Analysis
#### 3.2.1 Strategic Diagrams  
Three strategic diagrams (shown in Figure 4) were generated to analyze the changes over time in the research field for the three periods considered (1990-2010, 2011-2015 and 2016-2020). Table 1 shows the performance measures obtained for each topic in terms of several documents, h-index and values of centrality and density. Below is an analysis of the results obtained for each period.  
* First period (1990-2010). According to the strategic diagram presented in Figure 4a, 12 research topics are observed in the 1171 selected works in this period. Of these, five are driving themes (rural area, human, Millennium Development Goals, young adult, and health care facility, three are emerging or in decline (human rights, water resource and practice guideline), two are highly developed and isolated (United Nations and environmental policy) and two are considered basic and cross-cutting issues (economics and government). The performance analysis of each topic, from Table 1, complements the information provided by the diagram. The topics with the highest performance measures are human, health care facility, economics, and government. These topics have more than 25,000 citations between them, obtaining a higher h-index than the rest of the topics.
* Second period (2011-2015). According to the strategic diagram presented in Figure 4b, 16 themes are observed in the 2148 works selected in this period. Six of these issues were driving issues (HIV infections, financial management, rural area, Millennium Development Goals, health policy and human), four were emerging or declining themes (environment, United Nations, climate change and statistical model), three were highly developed and isolated themes (mobile phone, household survey and non-communicable disease) and three were basic and cross-cutting themes (retrospective study, trends and health care system). According to the performance measures (Table 1), the following three themes can be highlighted: human, health policy and cross-sectional study. These research topics had a high h-index and were considered in the largest number of documents.
* Third period (2016-2020). According to the strategic scheme presented in Figure 4c, nine research topics are observed in the 6953 works selected in this period. Seven were driving themes (greenhouse gases, disability-adjusted life year, health care cost, maternal health service, Sustainable Development Goals, human and health policy), six were emerging or declining themes (health risk, innovation, environmental impact assessment, prospective study, investment, innovation, and water resource) and two were basic topics (household and retrospective study). According to the performance measures (Table 1), the topics Sustainable Development Goals, human and health policy can be highlighted. These research topics had a high impact and had a higher h-index than the other topics.  
Figure 4: Strategic diagrams for (**a**) period 1, (**b**) period 2 and (**c**) period 3.  
Figure 5: Thematic network for period 2.