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Table 2 Incidence of bicycle-related injuries in Olmsted County, MN, 2002-2011

From: Pediatric bicycle-related head injuries: a population-based study in a county without a helmet law

  Females Males Total
Age group No. Ratea 95 % CIa No. Ratea 95 % CIa No. Rateb 95 % CIb
Any injury          
 5–9 years 193 403 (346, 460) 295 585 (518, 652) 488 496 (452, 540)
 10–14 years 150 327 (275, 380) 385 780 (702, 858) 535 560 (512, 607)
 15–18 years 24 61 (36, 85) 142 352 (294, 409) 166 211 (179, 243)
 All ages 367 278 (249, 306) 822 589 (549, 629) 1189 438 (413, 463)
Head injury          
 5–9 years 89 184 (145, 222) 173 337 (286, 387) 262 262 (230, 294)
 10–14 years 43 94 (66, 122) 132 267 (222, 313) 175 183 (156, 210)
 15–18 years 7 18 (5, 31) 56 138 (102, 174) 63 80 (60, 100)
 All ages 139 104 (87, 121) 361 255 (229, 281) 500 182 (166, 197)
Brain injury          
 5–9 years 11 23 (9, 36) 18 35 (19, 51) 29 29 (18, 39)
 10–14 years 13 28 (13, 44) 34 69 (46, 92) 47 49 (35, 63)
 15–18 years 2 5 (0, 12) 19 47 (26, 68) 21 27 (15, 38)
 All ages 26 20 (12, 27) 71 50 (39, 62) 97 35 (28, 43)
  1. aIncidence per 100,000 person-years, age-adjusted to the US white population in the year 2000
  2. bIncidence per 100,000 person-years, age- and sex-adjusted to the US white population in the year 2000