Table 1

Characteristics of included studies related to club football

PublicationCountrySettingAge
(mean±SD)		TeamsPlayersInjury recorderInjury Severity
Classifications		STROBE/5
(Reporting quality)		NOS/8(Methodological qualityNOS/8(Methodological quality
Blokland et al18The NetherlandsClub Football, Division I
one season ‘2014/2015; August–June*		22.4±3.36114Physician or Physical Therapist557
Engström et al19SwedenClub Football, Division I–II, 1 season, ‘1988/1999; November–October*21†241Medical students3iii16
Faude et al20GermanyClub Football, Division I
one season, ‘2003/2004; August–June*‡		22.4±5.09165Physician or Physical Therapist3i27
Gaulrapp et al21GermanyClub Football, Division I
one season, ‘2004/2005; August–June*‡		22.8†12254Team Physician3i37
Giza et al22USAClub Football, Division I
two seasons, ‘2001 and ‘2002; February–August*		Not reported8202Team trainer verified by PhysicianNot reported26
Hägglund et al23SwedenClub Football, Division I
one season, ‘2005; January–October*		23±412228Team Physician457
Jacobson and Tegner24SwedenClub Football, Division I
one season, ‘00; January–October*		23±49159Team Physiotherapist435
Larruskain et al25SpainClub Football, Division I
five seasons, 2010–2015; July–June*		25±5135Multiple456
Östenberg and Roos26SwedenClub Football, Division I–II, 1 season, 96 season24.1±6.1§
21.7±4.2§		2§32§Physical Therapist3iii16
Tegnander et al27NorwayClub Football, Division I
one season, ‘01; April–October		23±410181Team Physiotherapist3ii48

  • Severity classification key:

  • 3i—minor (0–7 days), moderate (8–30 days), major (+30 days).

  • 3ii—minor (1–7 days), moderate (8–21 days), major (+21 days).

  • 3iii—minor (7 days or less), moderate (7 days to 1 month), major (more than 1 month).

  • 4—minimal (1–3 days), mild (4–7 days), moderate (8–28 days), severe (+28 days).

  • 5—minimal (0 days), slight (1–3 days), minor (4–7 days), moderate (8–28 days), major (+28 days).

  • *Including preseason.

  • †No SD reported.

  • ‡Mid-season break Decmber–January.

  • §Data from elite level players only provided by author.

  • NOS, Newcastle-Ottawa Scale; STROBE, Strengthening The Reporting of Observational Studies in Epidemiology statement.