Ann Hepatobiliary Pancreat Surg.  2022 Aug;26(3):263-269. 10.14701/ahbps.21-169.

Epidemiological trends of gallbladder cancer in Australia between 1982 to 2018: A population-based study utilizing the Australian Cancer Database

• Mollah T
• Chia M
• Wang LC
• Modak P
• Qin KR

• KMID: 2532643
• DOI: http://doi.org/10.14701/ahbps.21-169

Abstract

Backgrounds/Aims
Gallbladder cancer (GBC) is a rare neoplasm. The epidemiology of GBC has not been updated in Australia for over five decades.
Methods
Data of all Australian patients diagnosed with GBC at any age from 1982 to 2018 were identified from the Australian Cancer Database. Age-standardized rates were calculated and joinpoint analysis was performed to ascertain the trends of incidence and mortality of GBC.
Results
Between 1982 and 2018, there were 22,745 cases of GBC and 11,054 GBC-related deaths in Australia. There were three distinct periods showing changed incidence. Period 1 (1982–1995) was stable. Period 2 (1996–2006) showed reduced incidence in females (3.6 to 2.8/100,000; p < 0.01) and all Australians (3.7 to 2.8/100,000, p < 0.01). Period 3 (2006–2017) demonstrated significantly increased incidence in all groups (males: 2.7 to 4.0/100,000, p < 0.01; females: 2.8 to 3.5/100,000, p < 0.01; all Australians: 2.8 to 3.7/100,000, p < 0.01). Incidence between females and males had declined from 1.10 : 1 in 1982 to 0.87 : 1 in 2017. There was a 71% reduction in mortality (3.1 to 0.9/100,000; p < 0.01). Median age at diagnosis increased from 69.7 to 74.3 years for females and from 67.2 to 73.3 years for males. Increasing incidence in the 6th to 8th decade of life in males, compared to previous years, was noted.
Conclusions
Incidence, mortality, sex, and age of GBC have significantly changed in Australia since 1982. Rising incidence of GBC in Australia warrants further investigation.

Keyword

Australia; Epidemiology; Neoplasms; Incidence; Mortality

Figure

• 

  Fig. 1 Incidence of gallbladder cancer (GBC) in Australia per 100,000 population by decade. (A) 1980s (1982–1989), (B) 1990s (1990–1999), (C) 2000s (2000–2009), and (D) 2010s (2010–2017). Data for the Northern Territory were not recorded in the 1980s or 1990s.

• 

  Fig. 2 Age demographics for gallbladder cancer in Australia. (A) Median age at time of diagnosis by sex with linear regression; (B) Age distribution in 1982 and 2017 by sex and age distribution (per 100,000 population) at three points in our dataset (1982, 2000, and 2017) for (C) males and (D) females.

• 

  Fig. 3 Joinpoint regression analysis demonstrating three distinct periods showing changed Australian gallbladder cancer incidence (per 100,000 age-standardized population) separated by all Australians (A), females (B), and males (C).

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  Fig. 4 Australian gallbladder cancer mortality rate (per 100,000 age-standardized population) according to sex.

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