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Correction: Persistent effects of playing football and associated (subconcussive) head trauma on brain structure and function: a systematic review of the literature
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Table 2 (section: Category†) contained some errors. The correct version of the table is as follows.
Table 2 Summary information about included studies (n=30)
Studies (n, (%)) | Female football players (n (%)) | Male football players (n (%)) | All football players (n (%)) | |
Control of type-1 errors | ||||
Appropriate | 12 (40.0) | 104 (27.4) | 414 (31.6) | 518 (30.6) |
Inappropriate / unclear | 18 (60.0) | 275 (72.6) | 898 (68.4) | 1173 (69.4) |
Total | 30 (100.0) | 379 (100.0) | 1312 (100.0) | 1691 (100.0) |
Selection of controls | ||||
Appropriate | 12 (40.0) | 12 (11.1) | 224 (54.2) | 236 (45.3) |
Inappropriate / unclear | 8 (26.7) | 96 (88.9) | 189 (45.8) | 285 (54.7) |
NA | 10 (33.3) | N/A | N/A | N/A |
Total | 30 (100.0) | 108 (100.0) | 413 (100.0) | 521 (100.0) |
Response rate* | ||||
High (>50%) | 7 (23.3) | 0 (0.0) | 462 (35.2) | 462 (27.3) |
Low (≤50%) | 3 (10.0) | 0 (0.0) | 135 (10.3) | 135 (8.0) |
Not reported | 20 (66.7) | 379 (100.0) | 715 (54.5) | 1094 (64.7) |
Total | 30 (100.0) | 379 (100.0) | 1312 (100.0) | 1691 (100.0) |
Gender | ||||
Football players | N/A | 379 (22.4) | 1312 (77.6) | 1691 (100.0) |
Control subjects | N/A | 108 (20.7) | 413 (79.3) | 521 (100.0) |
Category† | ||||
NCT | 23 | 365 | 1153 | 1518 |
Case-control studies | 1414-16 27-29 31 34 37 38 47 52 57 59 | 56 | 525 | 581 |
Impact of heading | 1712-19 28 29 32 34 37 52 53 57 59 | 310 | 863 | 1173 |
Impact of head-injuries | 1313-19 27 31-33 49 52 | 293 | 810 | 1103 |
Neuroimaging | 817 37 38 44 48 50 51 54 | 22 | 121 | 143 |
EEG | 255 56 | 0 | 106 | 106 |
Postural control | 137 | 0 | 15 | 15 |
Level of play‡ | ||||
Youth | 3 (10.0) | 69 (18.2) | 100 (7.6) | 169 (10.0) |
High-school / college | 9 (30.0) | 280 (73.9) | 234 (17.8) | 514 (30.4) |
University | 3 (10.0) | 22 (5.8) | 47 (3.6) | 69 (4.1) |
Amateur | 2 (6.7) | 8 (2.1) | 62 (4.7) | 70 (4.1) |
Professional | 8 (26.7) | 0 (0.0) | 677 (51.6) | 677 (40.0) |
Former professional | 5 (16.7) | 0 (0.0) | 192 (14.6) | 192 (11.4) |
Total | 30 (100.0) | 379 (100.0) | 1312 (100.0) | 1691 (100.0) |
*Fraction of participants that …