Cancer (50+ years)

Older Māori adults had significantly higher cancer registration rates than older non-Māori adults for all cancers (Table 19). Although the cancer registration rate for Māori males aged 50–64 years was significantly higher than for non-Māori (RR 1.19, CI 1.10–1.28), the disparity was greatest for Māori females, who had a cancer registration rate over 1.5 times that of non-Māori females the same age (RR 1.68, CI 1.57–1.79). Similar patterns were observed in cancer registrations of the 65+ years age group, with significantly higher rates for Māori compared with non-Māori (RR 1.14, CI 1.05–1.24 for males; RR 1.46, CI 1.33–1.59 for females).

In the 50–64 years age group, all-cancer mortality rates for Māori of both genders were over twice those of non-Māori (RR 2.25, CI 2.03–2.51 for males; RR 2.53, CI 2.28–2.80 for females). For the 65+ years age group, the all-cancer mortality rate was 1.5 times higher for Māori males compared to non-Māori males of the same age (RR 1.54, CI 1.41–1.67) and for females the disparity was even greater (RR 1.75, CI 1.60–1.91).

Across all cancer types, the disparities between Māori and non-Māori were generally greater in cancer mortality than in cancer registration.

How to interpret results – tables

Table 19: Cancer indicators, Māori and non-Māori, by gender, 2005–07
  Males Females
  50–64 years 65+ years 50–64 years 65+ years
Indicator Māori non-Maori Māori non-Māori Māori non-Māori Māori non-Māori
All cancer registrations, 2005–07, rate per 100,000 908.5
(843.6–977.1)
766.2
(748.9–783.7)
2604.7
(2441.6–2775.8)
2276.9
(2242.7–2311.4)
1145.2
(1075.8–1217.8)
681.7
(665.6–698.1)
1990.4
(1856.2–2131.6)
1366.1
(1342.5–1390.0)
All cancer mortality, 2005–07, rate per 100,000 507.5
(459.2–559.5)
225.2
(215.9–234.8)
1709.0
(1569.6–1857.4)
1112.3
(1089.1–1135.9)
512.5
(466.2–562.2)
202.9
(194.2–212.0)
1284.1
(1176.4–1399.0)
734.8
(718.3–751.6)

Sources: New Zealand Cancer Registry (NZCR), Ministry of Health; Mortality Collection (MORT), Ministry of Health

Notes:
Age standardised to the 2001 Census total Māori population.
Prioritised ethnicity has been used – see Ngā Tapuae me ngā Raraunga: Methods and data sources for further information.

Figures


Figures 11–12: Female cancer registration and mortality rates, Māori and non-Māori, 50–64 years, 2005–07

The most common cancers registered for Māori females aged 50−64 years were breast, lung, colorectal, uterine and stomach* (Figure 11). The leading causes of cancer death for Māori females were lung, breast, colorectal, stomach and cervical (Figure 12).

As shown in Figure 11, the greatest disparity in female cancer registrations for the 50–64 years age group occurred in lung cancer, where Māori females were 5 times more likely than non-Māori females to register for lung cancer (RR 5.25, CI 4.48–6.15). However, lung cancer mortality was 6 times higher for Māori females aged 50−64 years than for non-Māori females of the same age (RR 6.12, CI 5.11–7.34) (Figure 12). For breast cancer the disparities between Māori and non-Māori were significant in both registration and mortality (RR 1.66, CI 1.49–1.85 for breast cancer registrations; RR 1.84, CI 1.46–2.33 for breast cancer mortality). Cervical cancer registrations were over 3 times higher for Māori than for non-Māori (RR 3.34, CI 2.17–5.14), whereas the Māori cervical cancer mortality rate was more than 5 times that of non-Māori (RR 5.18, CI 2.86–9.39).

Figure 11: Female cancer registration rates, Māori and non-Māori aged 50–64 years, by site, 2005–07

Figure 11: Female cancer registration rates, Māori and non-Māori aged 50–64 years, by site, 2005–07

How to interpret results – figures
View the data source for this figure 11 >

Source: New Zealand Cancer Registry (NZCR), Ministry of Health

Notes:
Age standardised to the 2001 Census total Māori population.
Prioritised ethnicity has been used – see Ngā Tapuae me ngā Raraunga: Methods and data sources for further information.

Figure 12: Female cancer mortality rates, Māori and non-Māori aged 50–64 years, by site, 2005–07

Figure 12: Female cancer mortality rates, Māori and non-Māori aged 50–64 years, by site, 2005–07

How to interpret results – figures
View the data source for this figure 12 >

Source: Mortality Collection (MORT), Ministry of Health

Notes:
Age standardised to the 2001 Census total Māori population.
Prioritised ethnicity has been used – see Ngā Tapuae me ngā Raraunga: Methods and data sources for further information.

Figures 13–14: Female cancer registration and mortality rates, Māori and non-Māori, 65+ years, 2005–07

For Māori females aged 65+ years, the most common cancer registration and cancer mortality sites were lung, breast, colorectal, uterine and stomach (Figure 13 and Figure 14).

Figure 13 shows that Māori females aged 65+ years had a lung cancer registration rate almost 4 times that of non-Māori females of the same age (RR 3.95, CI 3.27–4.77). The relative disparity between Māori and non-Māori females of this age was similar for lung cancer mortality (Figure 14), with Māori female lung cancer mortality approximately 3.5 times that of non-Māori females (RR 3.58, CI 3.05–4.21). Differences in breast cancer registration and mortality rates were significantly higher for Māori females of this age compared to non-Māori (RR 1.39, CI 1.16–1.68 for breast cancer registration; RR 1.63, CI 1.27–2.10 for breast cancer mortality).

For colorectal cancer, registration and mortality rates for Māori females aged 65+ years were significantly lower than for non-Māori (RR 0.77, CI 0.59–1.00 for registration; RR 0.66, CI 0.47–0.92). The uterine cancer registration rate for Māori females aged 65+ years was over 1.7 times that for non-Māori females (RR 1.76, CI 1.19–2.60), while the mortality rate for this cancer was twice as high for Māori in this group compared to non-Māori (RR 2.28, CI 1.41–3.69).

Figure 13: Female cancer registration rates, Māori and non-Māori aged 65+ years, by site, 2005–07

Figure 13: Female cancer registration rates, Māori and non-Māori aged 65+ years, by site, 2005–07

How to interpret results – figures
View the data source for this figure 13 >

Source: New Zealand Cancer Registry (NZCR), Ministry of Health

Notes:
Age standardised to the 2001 Census total Māori population.
Prioritised ethnicity has been used – see Ngā Tapuae me ngā Raraunga: Methods and data sources for further information.

Figure 14: Female cancer mortality rates, Māori and non-Māori aged 65+ years, by site, 2005–07

Figure 14: Female cancer mortality rates, Māori and non-Māori aged 65+ years, by site, 2005–07

How to interpret results – figures
View the data source for this figure 14 >

Source: Mortality Collection (MORT), Ministry of Health

Notes:
Age standardised to the 2001 Census total Māori population.
Prioritised ethnicity has been used – see Ngā Tapuae me ngā Raraunga: Methods and data sources for further information.

Figures 15–16: Male cancer registration and mortality rates, Māori and non-Māori, 50–64 years, 2005–07

The most common cancer registration and cancer mortality sites for Māori males aged 50–64 years were lung, prostate, colorectal, stomach and liver (Figure 15 and Figure 16).

Lung cancer registration rates for Māori males aged 50–64 years were 4 times higher than for non-Māori males the same age (RR 4.17, CI 3.54–4.93) (Figure 15), whereas lung cancer mortality rates for Māori in this group were over 4.5 times those of non-Māori (RR 4.76, CI 3.99–5.68) (Figure 16). Prostate cancer registrations were significantly lower for Māori aged 50−64 years compared with non-Māori (RR 0.73, CI 0.62–0.87), but Māori this age were almost twice as likely to die from prostate cancer as non-Māori (RR 1.92, CI 1.18–3.11).

Figure 15: Male cancer registration rates, Māori and non-Māori aged 50–64 years, by site, 2005–07

Figure 15: Male cancer registration rates, Māori and non-Māori aged 50–64 years, by site, 2005–07

How to interpret results – figures
View the data source for this figure 15 >

Source: New Zealand Cancer Registry (NZCR), Ministry of Health

Notes:
Age standardised to the 2001 Census total Māori population.
Prioritised ethnicity has been used – see Ngā Tapuae me ngā Raraunga: Methods and data sources for further information.

Figure 16: Male cancer mortality rates, Māori and non-Māori aged 50–64 years, by site, 2005–07

Figure 16: Male cancer mortality rates, Māori and non-Māori aged 50–64 years, by site, 2005–07

How to interpret results – figures
View the data source for this figure 16 >

Source: Mortality Collection (MORT), Ministry of Health

Notes:
Age standardised to the 2001 Census total Māori population.
Prioritised ethnicity has been used – see Ngā Tapuae me ngā Raraunga: Methods and data sources for further information.

Figures 17–18: Male cancer registration and mortality rates, Māori and non-Māori, 65+ years, 2005–07

Māori males in the 65+ years age group were most likely to be registered with and die from prostate, lung, colorectal, stomach and liver cancers (Figure 17 and Figure 18).

As shown in Figure 17, there was no significant difference between the prostate cancer registration rate of Māori and non-Māori aged 65+ years (RR 0.89, CI 0.75–1.04). However, as was observed in the 50–64 years age group, the likelihood of dying of prostate cancer is significantly higher for Māori compared with non-Māori (RR 1.77, CI 1.43–2.20). In the 65+ years age group, the lung cancer registration rate for Māori males is over 2.5 times that of non-Māori males (RR 2.78, CI 2.33–3.32) and the mortality rate for lung cancer is just under 2.5 times higher for Māori compared with non-Māori (RR 2.38, CI 2.03–2.78).

The case mortality rate is the ratio of the number of deaths caused by a specific disease to the number of diagnosed cancers of that disease. For some cancers, the case mortality rate for older Māori was higher than for non-Māori, which suggests that Māori with these cancers have a higher risk of dying from their cancer than non-Māori (for further information see Robson et al 2010; Cormack et al 2007; Jeffreys et al 2005).

Figure 17: Male cancer registration rates, Māori and non-Māori aged 65+ years, by site, 2005–07

Figure 17: Male cancer registration rates, Māori and non-Māori aged 65+ years, by site, 2005–07

How to interpret results – figures
View the data source for this figure 17 >

Source: New Zealand Cancer Registry (NZCR), Ministry of Health

Notes:
Age standardised to the 2001 Census total Māori population.
Prioritised ethnicity has been used – see Ngā Tapuae me ngā Raraunga: Methods and data sources for further information.

Figure 18: Male cancer mortality rates, Māori and non-Māori aged 65+ years, by site, 2005–07

Figure 18: Male cancer mortality rates, Māori and non-Māori aged 65+ years, by site, 2005–07

How to interpret results – figures
View the data source for this figure 18 >

Source: Mortality Collection (MORT), Ministry of Health

Notes:
Age standardised to the 2001 Census total Māori population.
Prioritised ethnicity has been used – see Ngā Tapuae me ngā Raraunga: Methods and data sources for further information.

Back to top