Trends in head injury incidence in New Zealand: a hospital-based study from 1997/1998 to 2003/2004
Authors: Barker-Collo SL et al
Summary: Data from a national health database were analysed to
determine the incidence of traumatic brain injury (TBI)-related hospital
discharges (including 1-day stays) to New Zealand Hospitals from
1997/1998 to 2003/2004. Crude annual hospital-based incidence rates
for the total population ranged from 226.9 per 100,000 in 1998/1999
to 349.2 in 2002/2003. Incidence rates increased markedly with
the change from ICD-9 to ICD-10 diagnostic codes and disparities
were observed for ethnicity, age and gender. Crude annual hospitalbased
incidence rates for males and females in Māori (689/100,000
and 302.8/100,000 person-years) and Pacific Island populations
(582.6/100,000 and 217.6/100,000 person-years) exceeded those
for the remaining population (435.4/100,000 and 200.9/100,000
person-years), particularly for males. The overall age-standardised
hospital-based incidence rate for 2003/2004 was 342 per 100,000
per year, and 458 per 100,000 per year for Māori, with Māori males
experiencing a peak in incidence between 30 and 34 years of age
that was not apparent for the wider population.
Reference: Neuroepidemiology. 2009;32(1):32-9.
Abstract