Characteristics of the excluded studies with previously described hamstring injury
| First author, year of publication | Study population | No. of subjects* | Definition of previous injury | Age (years) (mean±SD) | % Male | No. of recurrences | Risk factors for recurrence |
|---|---|---|---|---|---|---|---|
| Engebretsen et al22 | Norwegian elite soccer players with recorded hamstring injury | 61 | Questionnaire: number, severity, nature and number of months since the most recent hamstring injury | 24.8±0.6 | 100% | 10 (16.4%) | Previous hamstring injury, OR=2.19 (1.19–4.03), p=0.01 |
| Gabbe et al23 | Elite Australian Rules football athletes with hamstring injury resulting in at least one missed match | 31 | Questionnaire: hamstring injury sustained during the previous 12 months | 21.8 (17.6–37.1) | 100% | 10 (32.3%) | Previous hamstring injury, OR=4.30 (1.66–11.15), p=0.003 Age, OR=4.04 (1.24–13.11), ‡p=0.020 |
| Petersen et al24 | Danish elite soccer players with an hamstring injury | 32 | Recalled hamstring injury in the last year before this study | 17–35† | 100% | 8 (25%) | |
| Verrall et al4 | Elite Australian Rules football athletes who sustained an acute Grade 1–3 hamstring | 32 | Injury occurred within the last two playing seasons and resulted in at least one missed match | 20.5±3.4 21.6±3.4 | 100% | 13 (40.6%) | Previous hamstring injury, OR=4.9 (1.6–15.1), p=0.006 |
| Woods et al1 | English elite soccer players with a reported hamstring injury by their Club medical staff | 749 | Sustained during training or competition that prevented the injured player from participating for more than 48 h | 17–35† | 100% | 89 (11.9%) | |
| Warren et al25 | Elite Australian Rules football Athletes with a hamstring injury resulting in at least one missed match | 59 | Clinically diagnosed by medical personnel and missed at least one missed match | 24 (17–33) | 100% | 9 (15%) | Previous hamstring injury past 12 months, AOR=16.9 (1.5–261.1), p=0.025 |