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Table 2 Quality assessment outcomes for individual studies using a modified version of the Subconcussion-Specific Tool

From: The Use of Biofluid Markers to Evaluate the Consequences of Sport-Related Subconcussive Head Impact Exposure: A Scoping Review

Reference

1

2

3

4

5

6

Category

Score

Akkurt et al. [100]

No

Yes

Yes

Yes

Yes

No

B

4

Alosco et al. [101]

No

Yes

Yes

No

No

No

C

2

Alosco et al. [43]

No

Yes

Yes

No

No

No

C

2

Antonio et al. [39]

No

No

Yes

No

Yes

No

C

2

Arslan et al. [54]

No

No

No

No

Yes

No

C

1

Asken et al. [55]

No

No

Yes

Yes

Yes

Yes

B

4

Austin et al. [91]

No

Yes

Yes

Yes

Yes

Yes

A

5

Bamaç et al. [98]

No

Yes

Yes

Yes

Yes

No

B

4

Bernick et al. [79]

No

No

No

No

Yes

No

C

1

Bouvier et al. [56]

No

Yes

Yes

No

Yes

Yes

B

4

Brayne et al. [37]

No

Yes

No

No

Yes

No

C

2

Di Battista et al. [80]

No

No

Yes

Yes

Yes

Yes

B

4

Dorminy et al. [58]

No

Yes

Yes

Yes

Yes

No

B

4

Graham et al. [59]

No

Yes

No

No

Yes

No

C

2

Graham et al. [60]

No

No

No

No

Yes

No

C

1

Heileson et al. [92]

No

No

Yes

No

Yes

No

C

2

Hicks et al. [49]

No

Yes

Yes

No

Yes

No

B

3

Hoffman et al. [61]

No

No

Yes

No

Yes

No

C

2

Horner et al. [97]

No

No

No

No

Yes

No

C

1

Huibregtse et al. [62]

Yes

Yes

Yes

Yes

Yes

No

A

5

Huibregtse et al. [102]

No

Yes

Yes

Yes

Yes

No

B

4

Joseph et al. [42]

No

Yes

Yes

No

Yes

No

B

3

Kawata [63]

Yes

Yes

Yes

Yes

Yes

Yes

A

6

Kawata et al. [64]

Yes

Yes

Yes

Yes

Yes

No

A

5

Kawata et al. [81]

Yes

Yes

Yes

Yes

Yes

No

A

5

Kawata et al. [82]

No

No

No

No

Yes

No

C

1

Kelestimur et al. [103]

No

No

Yes

No

Yes

No

C

2

Kelly et al. [104]

No

No

Yes

Yes

Yes

No

B

3

Major et al. [83]

Yes

No

Yes

Yes

Yes

Yes

A

5

Marchi et al. [65]

No

Yes

Yes

Yes

Yes

No

B

4

Matuk et al. [50]

No

No

No

No

No

Yes

C

1

Meier et al. [105]

No

No

Yes

Yes

Yes

No

B

3

Muñoz et al. [106]

No

Yes

Yes

Yes

No

No

B

3

Muraoka et al. [44]

No

Yes

Yes

No

Yes

No

B

3

Muraoka et al. [84]

No

Yes

Yes

No

Yes

No

B

3

Mussack et al. [40]

No

No

Yes

Yes

Yes

No

B

3

Neselius et al. [46]

No

No

No

Yes

Yes

No

C

2

Neselius et al. [45]

No

No

No

Yes

Yes

No

C

2

Neselius et al. [66]

No

No

No

Yes

Yes

No

C

2

Nowak et al. [85]

Yes

Yes

Yes

Yes

Yes

Yes

A

5

Obminski et al. [107]

No

No

No

No

No

No

C

0

O’Brien et al. [108]

No

No

Yes

Yes

Yes

Yes

B

4

O'Connell et al. [67]

No

No

Yes

No

No

No

C

1

O'Keeffe et al. [68]

Yes

No

No

Yes

Yes

No

B

3

Oliver et al. [93]

No

No

Yes

No

Yes

No

C

2

Oliver et al. [86]

Yes

No

Yes

No

Yes

No

B

3

Oliver et al. [87]

Yes

No

Yes

No

Yes

No

B

3

Otto et al. [69]

No

Yes

No

No

No

No

C

1

Owens et al. [109]

No

Yes

No

No

Yes

No

C

2

Oztasyonar [99]

No

No

No

No

Yes

No

C

1

Papa et al. [110]

No

No

No

Yes

No

Yes

C

2

Pin et al. [51]

Yes

Yes

Yes

Yes

Yes

Yes

A

6

Puvenna et al. [70]

Yes

Yes

Yes

No

No

No

B

3

Rogatzki et al. [71]

No

No

Yes

No

Yes

No

C

2

Rogatzki et al. [72]

No

Yes

Yes

No

Yes

No

B

3

Roser et al. [111]

No

No

Yes

No

Yes

No

C

2

Rubin et al. [94]

Yes

Yes

Yes

Yes

Yes

Yes

A

6

Sandmo et al. [88]

No

Yes

Yes

No

Yes

No

B

3

Sandmo et al. [112]

No

Yes

Yes

No

Yes

No

B

3

Shahim et al. [95]

No

No

No

No

Yes

No

C

1

Soriano et al. [52]

Yes

No

Yes

Yes

Yes

No

B

4

Stålnacke and Sojka [73]

No

Yes

Yes

No

Yes

No

B

3

Stålnacke et al. [74]

No

Yes

No

No

Yes

No

C

2

Stålnacke et al. [75]

No

Yes

Yes

No

Yes

No

B

3

Stålnacke et al. [38]

No

Yes

No

No

Yes

Yes

B

3

Stern et al. [89]

No

No

Yes

No

Yes

No

C

2

Straume-Naesheim et al. [76]

No

Yes

Yes

No

Yes

No

B

3

Symons et al. [53]

No

No

Yes

Yes

Yes

Yes

B

4

Tanriverdi et al. [113]

No

No

No

No

Yes

No

C

1

Tanriverdi et al. [114]

No

No

Yes

No

Yes

No

C

2

Tanriverdi et al. [115]

No

No

Yes

No

Yes

No

C

2

Tanriverdi et al. [116]

No

No

Yes

No

Yes

No

C

2

Vike et al. [117]

No

Yes

No

Yes

Yes

No

B

3

Wallace et al. [90]

No

Yes

No

No

Yes

No

C

2

Wirsching et al. [96]

Yes

Yes

Yes

Yes

Yes

No

A

5

Zetterberg et al. [47]

No

No

No

No

No

No

C

0

Zetterberg et al. [48]

No

Yes

Yes

No

Yes

No

B

3

Zetterberg et al. [77]

No

No

Yes

No

No

No

C

1

Zonner et al. [41]

Yes

Yes

Yes

Yes

Yes

No

A

5

  1. Category A: met five or more criteria, Category B: met three or four criteria and Category C: met two or less criteria. Domains assessed: (1) Was there an attempt to define the term ‘subconcussion’? (2) Was the number or magnitude of impacts reported? (note that if impacts were recorded however not reported but impact data were included in the analysis, then the criterion was considered met) (3) Were subjects who sustained a concussion during the study controlled for or excluded from analyses? (4) Were subjects with a history of concussion controlled for or excluded from the analyses? (5) Was the control group matched on two or more variables (e.g., history of concussion, history of contact sport participation, age etc.)? (6) Did the study analyze sex differences, or acknowledge limitations associated with sampling only males or females?