Number of clinical trials in Sierra Leone
Sierra Leone: Number of clinical trials was 2 trials in 2024. ◆ Volatile
Number of clinical trials in Sierra Leone, 2004–2024
Source: ClinicalTrials.gov (2025) – with major processing by Our World in Data. Measured in trials.
Analysis
The most recent figure for number of clinical trials in Sierra Leone is 2 trials, measured in 2024.
That represents a change of unchanged over ten years.
Over the whole period, number of clinical trials in Sierra Leone peaked at 7 trials in 2019 and was at its lowest, 1 trials, in 2004.
Sierra Leone ranks 108th of 153 countries on this measure, in the middle of the range.
The series is highly variable year to year, so single readings are best treated with caution.
Number of clinical trials in Sierra Leone, year by year
| Year | trials | Change |
|---|---|---|
| 2004 | 1 trials | — |
| 2007 | 1 trials | +0.0% |
| 2008 | 1 trials | +0.0% |
| 2013 | 1 trials | +0.0% |
| 2014 | 2 trials | +100.0% |
| 2016 | 2 trials | +0.0% |
| 2017 | 2 trials | +0.0% |
| 2018 | 1 trials | -50.0% |
| 2019 | 7 trials | +600.0% |
| 2020 | 2 trials | -71.4% |
| 2021 | 1 trials | -50.0% |
| 2022 | 4 trials | +300.0% |
| 2023 | 2 trials | -50.0% |
| 2024 | 2 trials | +0.0% |
Sierra Leone compared with similar countries
- Sierra Leone's 2 trials is below the median for low income countries, which is 4 trials, 50% of the median. (19 countries reporting)
- Sierra Leone's 2 trials is below the median for Sub-Saharan Africa, which is 3 trials, 67% of the median. (35 countries reporting)
Biggest year-on-year movements
Years where Number of clinical trials in Sierra Leone changed far more than this series normally does. A large move can be a real event or a change in how the figure was measured — the source note below says who published it.
| Year | Change | From | To |
|---|---|---|---|
| 2019 | +600.0% | 1 trials | 7 trials |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 2000s | 1 trials | 1 trials | 1 trials | 3 |
| 2010s | 2.5 trials | 1 trials | 7 trials | 6 |
| 2020s | 2.2 trials | 1 trials | 4 trials | 5 |
Countries ranked near Sierra Leone
- 108 Afghanistan 2 trials compare
- 108 Azerbaijan 2 trials compare
- 108 Bahrain 2 trials compare
- 108 Belarus 2 trials compare
- 108 Guinea 2 trials compare
- 108 Honduras 2 trials compare
- 108 Liberia 2 trials compare
- 108 Mauritius 2 trials compare
- 108 Moldova 2 trials compare
- 108 Mongolia 2 trials compare
- 108 Myanmar 2 trials compare
- 108 Nicaragua 2 trials compare
- 108 Niger 2 trials compare
- 108 North Macedonia 2 trials compare
- 108 Trinidad and Tobago 2 trials compare
- 108 Uruguay 2 trials compare
- 108 Venezuela 2 trials compare
- 108 Zimbabwe 2 trials compare
More reference data data for Sierra Leone
- Emission Totals - Indirect emissions (N2O) - Manure applied to Soils 0.0238 (2050)
- Emission Totals - Indirect emissions (N2O) - Manure left on Pasture 0.4498 (2050)
- Emission Totals - Indirect emissions (N2O) - IPCC Agriculture 0.5935 (2050)
- Emission Totals - Indirect emissions (N2O) - Crop Residues 0.12 (2050)
- Emission Totals - Indirect emissions (N2O) - Agricultural Soils 0.5935 (2050)
- Emission Totals - Emissions (N2O) - Manure applied to Soils 0.0797 (2050)
- Emission Totals - Emissions (N2O) - Manure Management 0.044 (2050)
- Emission Totals - Emissions (N2O) - Manure left on Pasture 1.91 (2050)
- Emission Totals - Emissions (N2O) - IPCC Agriculture 2.72 (2050)
- Emission Totals - Emissions (N2O) - Crop Residues 0.6534 (2050)
Frequently asked questions
- What is number of clinical trials in Sierra Leone?
- Number of clinical trials in Sierra Leone was 2 trials in 2024, according to ClinicalTrials.gov (2025) – with major processing by Our World in Data.
- What is the highest number of clinical trials recorded in Sierra Leone?
- The highest recorded value was 7 trials in 2019.
- What is the lowest number of clinical trials recorded in Sierra Leone?
- The lowest recorded value was 1 trials in 2004.
- How does Sierra Leone rank for number of clinical trials?
- Sierra Leone ranks 108th out of 153 countries with data for 2024.
- Is number of clinical trials rising or falling in Sierra Leone?
- Over the last ten years it is unchanged. The long-run trend across the full record is volatile.
- Where does this Sierra Leone data come from?
- The figures come from ClinicalTrials.gov (2025) – with major processing by Our World in Data, published as part of Number of clinical trials. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 14 observations, free to reuse under CC BY 4.0 (Our World in Data).
About this data
Annual number of completed clinical trials registered in the ClinicalTrials.gov database for each country. Registration in the ClinicalTrials database is mandatory for trials in the United States, but voluntary for other countries.