Hospital separations were classified using ICD-9-CM up to 1997-98 and ICD-10-AM from 1998-99 onwards. Rates were age-adjusted using the Australian population as at 30 June 2001. Numbers for 2004-05 include an estimate of the small number of interstate hospitalisations, data for which were unavailable at the time of production.
Source:
NSW Inpatient Statistics Collection and ABS population estimates (HOIST). Centre for Epidemiology and Research, NSW Department of Health.
Between 1989-90 and 2004-05, the rate of hospitalisation for the removal or restoration of teeth in persons aged over 15 years increased by 58.1%. About half of the steep increase in rates between 2000-01 and 2001-02 involved the removal of wisdom teeth, classified as 'unerupted or partly erupted tooth with removal of bone or tooth division'. However, coding changes in the same period may also have contributed to the increase. The hospitalisation rate for females in this age group was consistently around 80% higher than the rate for males.
Hospitalisation in adults constituted only 22.8% of all hospitalisations for removal and restoration of teeth in 2004-05. The majority of hospitalisations in adults were for surgical removal of teeth and about three quarters of those were in people aged between 15 and 34 years old. Most of these were for removal of wisdom teeth. Females over 15 years old were hospitalised at much greater rate than males (75% higher in 2004-05).
About a quarter (24.1%) of all hospitalisations for removal and restoration of teeth in all ages were in public hospitals in 2000-01, but this proportion decreased to about one fifth (19.3%) in 2004-05.
In public hospitals and in adults, the hospitalisation rate for restoration of teeth did not change between 2000-01 and 2004-05 and remained about 2.4 per 100,000, but the rate for removal of teeth decreased from 58.9 to 54.8 per 100,000 (7%) in the same period.
In private hospitals, however, the hospitalisation rate for restoration of teeth in adults decreased from 10.1 to 7.6 per 100,000 (24.8%) and increased considerably for removal of teeth from 256.9 to 355.3 per 100,000 (33.6%) between 2000-01 and 2004-05.
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Population Health Division. The health of the people of New South Wales -
Report of the Chief Health Officer. Sydney: NSW Department of Health. Available at:
http://www.health.nsw.gov.au/public-health/chorep/ora/ora_prochos.htm. Accessed (insert date of access).
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