Table 2

Incidence rates of (complicated) head injury

Patient age and sexAll head injuries (n=694)Complicated head injury (n=36)
Mid-time population*HI (n)Incidence rate per 1000 person-years (95% CI)Mid-time population*cHI (n)Incidence rate per 1000 person-years (95% CI)Proportion complicated cHI of all HI (in %)
Male
 0–1 year41854129.2 (98.0 to 167.3)374110.27 (0.01 to 1.31)0.21
 2–5 years10019392.9  (75.4 to 113.3)670810.15 (0.007 to 0.74)0.16
 6–15 years23098938.5 (31.1 to 47.2)15 13510.07 (0.003 to 0.33)0.18
 16–40 years46785311.3 (8.6 to 14.7)32 48440.12 (0.04 to 0.30)1.06
 41–60 years46064810.4 (7.8 to 13.7)32 37530.09 (0.02 to 0.25)0.87
 >60 years24823413.7 (9.6 to 18.9)17 69460.34 (0.14 to 0.71)2.48
 Total15 49437123.9 (21.6 to 26.5)108 137160.15 (0.09 to 0.24)0.63
Female
 0–1 year43651117.0 (88.0 to 152.6)365000 (−)0
 2–5 years9494143.2 (31.4 to 58.1)611910.16 (0.008 to 0.81)0.37
 6–15 years21044521.4 (15.8 to 28.4)14 12720.14 (0.024 to 0.047)0.65
 16–40 years50107014.0 (11.0 to 17.6)34 54600 (−)0
 41–60 years4550378.1 (5.8 to 11.1)32 26530.09 (0.024 to 0.25)1.11
 >60 years28267928.0 (22.3 to 34.7)21 531140.65 (0.37 to 1.07)2.32
 Total15 87532320.4 (18.2 to 22.7)112 238200.18 (0.11 to 0.27)0.88
Male and female
 0–1 year854105123.0 (101.1 to 148.2)739110.14 (0.006 to 0.67)0.11
 2–5 years195013468.7 (57.8 to 81.1)12 82720.16 (0.026 to 0.52)0.23
 6–15 years441313430.4 (25.5 to 35.9)29 26230.10 (0.03 to 0.28)0.33
 16–40 years968812312.7 (10.6 to 15.1)67 03040.06 (0.02 to 0.14)0.47
 41–60 years9156859.3 (7.5 to 11.4)64 64060.09 (0.038 to 0.19)0.97
 >60 years530811321.3 (17.6 to 25.5)39 225200.51 (0.32 to 0.77)2.39
 Total31 36969422.1 (20.5 to 23.8)220 375360.16 (0.12 to 0.22)0.72
  • *Mid-time population is calculated by means of total patient population on 1 January and 31 December.

  • cHI, complicated head injury.