Journal Abbreviation: SLEEP
                Journal ISSN: 0161-8105
| Year | Impact Factor (IF) | Total Articles | Total Cites | 
| 2024 (2025 update) | 4.9 | - | 27322 | 
| 2023 | 5.3 | - | - | 
| 2022 | 5.6 | - | 29797 | 
| 2021 | 6.313 | - | 31283 | 
| 2020 | 5.849 | 232 | 28688 | 
| 2019 | 4.805 | 221 | 22296 | 
| 2018 | 4.571 | 196 | 21434 | 
| 2017 | 5.135 | 224 | 20547 | 
| 2016 | 4.923 | 219 | 18127 | 
| 2015 | 4.793 | 196 | 16906 | 
| 2014 | 4.591 | 196 | 16335 | 
| 2013 | 5.062 | 200 | 15667 | 
| 2012 | 5.100 | 162 | 14444 | 
| 2011 | 5.051 | 178 | 12587 |