Data and Methods
In this page we explain the process followed by Development Gateway in the development of the TCDI Nigeria website, as well as a description of the data sources and analysis methods used in each of the website’s themes.
View the methodologies for the respective themes
The TCDI Nigeria website was developed by Development Gateway. The website is intended to respond to the needs of government, civil society and academic stakeholders by providing access to demand-driven, high-quality data on national tobacco prevalence, products, and policies. The design, functionality and content for the website are led by the Nigerian tobacco control community’s needs. This document outlines our overall website development methodology.
1. Identifying Stakeholder Needs
From June to July 2020, the TCDI Nigeria team conducted interviews with 20 organizations which included representatives from the government, civil-society organizations and academia. As a result of the COVID-19 pandemic, the interviews were conducted virtually. The interviews aimed to explore how they make decisions, the data production and use for these decisions, potential data gaps, and data opportunities.
2. Reviewing Stakeholder Feedback and Prioritising Needs
The stakeholder feedback was documented during the interviews and later analysed to identify cross-cutting data gaps and the stakeholders’ preferred online tool formats for receiving information. This process identified 19 data gaps which were later narrowed down to six during a stakeholder co-design workshop, based on the frequency and urgency with which each was mentioned by the stakeholders. The process also identified 7 data format guidelines:
Priority Data Gaps
- Use and prevalence of shisha, particularly by young people
- Illicit Trade
- Tobacco use prevalence
- Tobacco Harm
- Tobacco Industry Interference
Preferred online tool format
- Interactive website
- Factsheets / One pagers
- Graphics e.g. charts/interactive graphs
- Data repository/ online library
The stakeholders also identified the need for training, data access/availability, and time for analysis for them to be able to use the data effectively.
3. Research and Analysis
The TCDI team conducted research and data analysis for each theme, including secondary analysis of already available and reliable datasets (e.g. data collected by academic institutions, global foundations or governments) and reviews of existing literature (e.g. peer-reviewed academic articles). Where required, the datasets were analysed using statistical software such as Stata and R. Relevant statistics and graphs were produced, and explanatory text was written.
4. Website Design
Using the eight data tool format guidelines as a starting point, the TCDI team designed the visual elements and functionality of the website. This process included designing the visual elements (infographics, chart formats and colours) and the user functionality (menus, data exports and search functionality).
5. Expert Review
At least two Nigerian tobacco control subject matter experts were selected per theme to review the quality, context and reliability of the content. The University of Cape Town has also been involved in the review process. Their feedback was integrated into the text and the design of the website.
6. Periodic Updates
Periodically, the TCDI team will consult with experts, review newly available data, and update the website to reflect any changes, where necessary. Please fill out the Showcase Your Work form if you have newly available data or publications you would like to share.
The content in this website is licensed under the Creative Commons Attribution-NonCommercial 4.0 International license. Users of this website can copy and redistribute the material in any medium or format, as well as remix, transform, and build upon the data. When reusing the data, users must:
Credit Tobacco Control Data Initiative as the source of data and indicate if changes are made to the data.
If content is shared, it needs to be done using the same licence or similar license. Users cannot share the data with more restrictive rights to use than under the original website license.
Users can use the data as they see fit, but cannot use the material for commercial purposes.
See the full license terms here.
The information displayed on this website is obtained from multiple sources and has undergone a rigorous verification process. Nevertheless, the accuracy and validity of data and information cannot be guaranteed. The website should therefore be used for guidance only. The TCDI team, and the authors whom we reference, cannot be held responsible for how the information is used.
For any queries on the TCDI methodological approach and data sources, kindly contact the TCDI Data Manager.
1. When estimating statistics from surveys and samples, it is possible that the calculated average values are not exactly the averages of the whole population. The confidence interval of a statistic is the range of values around that statistic that has a defined level of probability of containing the true value of the statistic for the entire population. We usually use a 95% confidence interval. This means that we are 95% certain the interval contains the true value. When comparing two statistics, for example the prevalence of smoking in two different population groups, we can only conclude that the prevalence is significantly different between the groups if their confidence intervals do not overlap. If they overlap, the true population value may be the same for each group.
2. Ofem, B. (2012). A Review of the Criteria for Defining Urban Areas in Nigeria. Journal of Human Ecology. Volume 37 Issue 3. A Review of the Criteria for Defining Urban Areas in Nigeria. https://doi.org/10.1080/09709274.2012.11906461
3. Van der Zee, K. and Van Walbeek, C. (2020). The TETSiM Model, REEP Back to Basics Policy Brief: B2B#8. University of Cape Town. https://untobaccocontrol.org/kh/taxation/wp-content/uploads/sites/3/2020/05/KH_1pager-8_The-TETSiM-Model.pdf