Variables | No. (%) or mean ± SD |
---|---|
Number | 30,994 |
Age (mo), mean ± SD | 41.9 ± 40.8 |
  < 2 yrs | 13,527 (43.6) |
 2 yrs. ≤ age < 5 yrs | 9715 (31.3) |
 5 yrs. ≤ age < 12 yrs | 5802 (18.7) |
 12 yrs. ≤ age < 18 yrs | 1950 (6.3) |
Sex (male), No. (%) | 16,929 (54.6) |
Incident year, No. (%) | 30,991 (100.0) |
 2010 | 4001 (12.9) |
 2011 | 6427 (20.7) |
 2012 | 3753 (12.1) |
 2013 | 2913 (9.4) |
 2014 | 5702 (18.4) |
 2015 | 8195 (26.44) |
Incident season | 30,994 (100.0) |
 Spring (Mar, Apr, May) | 7765 (25.1) |
 Summer (Jun, Jul, Aug) | 5124 (16.5) |
 Fall (Sep, Oct, Nov) | 10,065 (32.5) |
 Winter (Dec, Jan, Feb) | 8040 (25.9) |