Characteristic | Timing of concussion; no. (%) of patients | |
---|---|---|
Weekend n = 39 940 | Weekday n = 195 170 | |
Age, yr | ||
≤29 | 16 088 (40) | 67 793 (35) |
30–44 | 9 493 (24) | 50 390 (26) |
45–59 | 6 051 (15) | 35 727 (18) |
≥60 | 8 308 (21) | 41 260 (21) |
Sex | ||
Male | 22 380 (56) | 98 922 (51) |
Female | 17 560 (44) | 96 248 (49) |
Income quintile | ||
Highest | 7 141 (18) | 37 700 (19) |
Next to highest | 7 500 (19) | 38 148 (20) |
Middle | 7 799 (20) | 38 209 (20) |
Next to lowest | 8 266 (21) | 38 973 (20) |
Lowest* | 9 234 (23) | 42 140 (22) |
Home location | ||
Urban | 34 038 (85) | 167 975 (86) |
Rural* | 5 902 (15) | 27 195 (14) |
Date of enrolment† | ||
Remote | 18 874 (47) | 87 386 (45) |
Recent | 21 066 (53) | 107 784 (55) |
Initial imaging | ||
Skull radiography | 2 728 (7) | 10 678 (5) |
Computed tomography | 7 364 (18) | 22 269 (11) |
Magnetic resonance imaging | 189 (< 1) | 1 654 (1) |
Any fracture‡ | 830 (2) | 2 234 (1) |
Prior diagnosis§ | ||
Schizophrenia | 336 (1) | 1 362 (1) |
Depression | 1 707 (4) | 8 515 (4) |
Bipolar disorder | 603 (2) | 2 720 (1) |
Substance abuse | 1 554 (4) | 6 646 (3) |
Anxiety disorder | 8 223 (21) | 44 003 (23) |
Any condition¶ | 9 734 (24) | 51 181 (26) |
Prior hospital admission§ | 1 491 (4) | 8 157 (4) |
Prior suicide attempt§ | 56 (< 1) | 200 (< 1) |
↵* Includes missing values.
↵† ”Remote” denotes years 1992–2001; “recent” denotes years 2002–2012.
↵‡ Any bone (codes 800–829, International Classification of Diseases and Related Health Problems, 9th revision41).
↵§ Assessed during the year before concussion.
↵¶ Any of the specified psychiatric diagnoses listed above.