The quality score and scientific level of evidence for articles investigating previous injury as a risk factor for injury in professional footballers
| Study name | Study design | Participant details | Playing level | Main finding | Quality score (%) | Level of evidence |
|---|---|---|---|---|---|---|
| Nordstrom et al6 | Prospective cohort | 1665 players from 46 teams over 10 countries | UEFA Champions League | Supports previous injury as a risk factor | 88 | 2++ |
| Hagglund et al7 | Prospective cohort | 1401 players from 26 teams over 10 countries | UEFA Champions League | Supports previous injury as a risk factor | 100 | 2++ |
| *Fousekis et al8 | Prospective cohort | 100 players from 4 teams | Greek 3rd Division | Does not support previous injury as a risk factor | 80 | 2++ |
| Walden et al9 | Prospective cohort | 310 players from 14 teams | Swedish Premier League | Supports previous injury as a risk factor | 100 | 2++ |
| Hagglund et al10 | Prospective cohort | 197 players from 12 teams | Swedish Premier League | Supports previous injury as a risk factor | 100 | 2++ |
| Arnason et al11 | Prospective cohort | 306 from 20 teams | Iceland Top 2 Divisions | Supports previous injury as a risk factor | 100 | 2++ |
*Articles used in more than 1 section.