Demographic data of control and concussion groups by sex
| Demographic data | Control | Concussion | ||
| Men | Women | Men | Women | |
| Age, mean (SD), years | 25 (18) | 30 (21) | 25 (18) | 30 (21) |
| SEFI-2, mean (SD) | −0.04 (1.02) | −0.05 (1.00) | −0.05 (1.02) | −0.04 (1.00) |
| CCI, mean (SD) | 0.2 (0.6) | 0.2 (0.6) | 0.2 (0.6) | 0.3 (0.7) |
| Number of individuals included by fiscal year, n (%) | Men (81 871) | Women (57 159) | Men (28 021) | Women (19 462) |
| 1990–1991 | 3111 (3.8) | 2076 (3.6) | 1043 (3.7) | 697 (3.6) |
| 1991–1992 | 3297 (4.0) | 2100 (3.7) | 1108 (4.0) | 704 (3.6) |
| 1992–1993 | 2952 (3.6) | 1824 (3.2) | 997 (3.6) | 615 (3.2) |
| 1993–1994 | 2869 (3.5) | 1855 (3.2) | 972 (3.5) | 626 (3.2) |
| 1994–1995 | 2837 (3.5) | 1917 (3.4) | 966 (3.4) | 648 (3.3) |
| 1995–1996 | 2867 (3.5) | 1815 (3.2) | 976 (3.5) | 618 (3.2) |
| 1996–1997 | 2599 (3.2) | 1613 (2.8) | 889 (3.2) | 548 (2.8) |
| 1997–1998 | 2556 (3.1) | 1595 (2.8) | 872 (3.1) | 541 (2.8) |
| 1998–1999 | 2909 (3.6) | 1757 (3.1) | 997 (3.6) | 601 (3.1) |
| 1999–2000 | 3151 (3.8) | 1877 (3.3) | 1082 (3.9) | 642 (3.3) |
| 2000–2001 | 3628 (4.4) | 2098 (3.7) | 1253 (4.5) | 717 (3.7) |
| 2001–2002 | 3161 (3.9) | 1994 (3.5) | 1089 (3.9) | 685 (3.5) |
| 2002–2003 | 3464 (4.2) | 2035 (3.6) | 1190 (4.2) | 695 (3.6) |
| 2003–2004 | 3288 (4.0) | 2153 (3.8) | 1140 (4.1) | 733 (3.8) |
| 2004–2005 | 3405 (4.2) | 2073 (3.6) | 1174 (4.2) | 712 (3.7) |
| 2005–2006 | 3253 (4.0) | 2247 (3.9) | 1121 (4.0) | 768 (3.9) |
| 2006–2007 | 3167 (3.9) | 2265 (4.0) | 1089 (3.9) | 777 (4.0) |
| 2007–2008 | 3060 (3.7) | 2222 (3.9) | 1058 (3.8) | 762 (3.9) |
| 2008–2009 | 2801 (3.4) | 2306 (4.0) | 969 (3.5) | 785 (4.0) |
| 2009–2010 | 2806 (3.4) | 2258 (4.0) | 963 (3.4) | 771 (4.0) |
| 2010–2011 | 3382 (4.1) | 2467 (4.3) | 1159 (4.1) | 840 (4.3) |
| 2011–2012 | 4431 (5.4) | 3115 (5.4) | 1518 (5.4) | 1060 (5.4) |
| 2012–2013 | 4097 (5.0) | 3291 (5.8) | 1409 (5.0) | 1123 (5.8) |
| 2013–2014 | 4335 (5.3) | 3852 (6.7) | 1478 (5.3) | 1316 (6.8) |
| 2014–2015 | 4445 (5.4) | 4354 (7.6) | 1509 (5.4) | 1478 (7.6) |
| Number of secondary condition diagnoses, n (%) | Men | Women | Men | Women |
| Attention-deficit hyperactivity disorders | 3453 (4.2) | 927 (1.6) | 1674 (6.0) | 594 (3.1) |
| Mood and anxiety disorders | 13 524 (16.5) | 16 277 (28.5) | 7823 (27.9) | 8856 (45.5) |
| Dementia | 1159 (1.4) | 1592 (2.8) | 779 (2.8) | 943 (4.8) |
| Parkinson's disease | 423 (0.5) | 560 (1.0) | 276 (1.0) | 327 (1.7) |
CCI, Charlson Comorbidity Index; SEFI-2, Socioeconomic Factor Index - version 2.