Auckland District Health Board



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Heart disease and stroke


Table : Hospitalisations for circulatory system diseases, 25 years and over, Auckland DHB, 2011–2013

Gender

Māori

Non-Māori

Māori/non-Māori

ratio (95% CI)



Rate difference

Ave. no. per year

Age-standardised
rate per 100,000 (95% CI)

Ave. no. per year

Age-standardised
rate per 100,000 (95% CI)

Female

191

1,531.9

(1,409.1,

1,665.4)

2,287

784.9

(762.1,

808.4)

1.95

(1.79,

2.13)

747.0

Male

222

2,063.6

(1,911.1,

2,228.2)

2,911

1,342.4

(1,311.3,

1,374.2)

1.54

(1.42,

1.67)

721.2

Total

413

1,797.7

(1,698.7,

1,902.5)

5,198

1,063.7

(1,044.3,

1,083.4)

1.69

(1.59,

1.79)

734.1

Source: NMDS
Note: Ratios in bold show that Māori rates were significantly different from non-Māori rates in the DHB.

During 2011–2013, there were 413 hospital admissions per year among Māori for diseases of the circulatory system (including heart disease and stroke), at a rate 69% higher than non-Māori, or 734 more admissions per 100,000.

Table : Ischaemic heart disease indicators, 25 years and over, Auckland DHB, 2011–2013

Gender

Māori

Non-Māori

Māori/non-Māori

ratio (95% CI)



Rate difference

Ave. no. per year

Age-standardised

rate per 100,000 (95% CI)



Ave. no. per year

Age-standardised

rate per 100,000 (95% CI)



Ischaemic heart disease admissions

Female

30

224.5

(182.2,

276.7)

427

126.4

(118.3,

135.1)

1.78

(1.43,

2.21)

98.1

Male

44

397.9

(335.0,

472.5)

782

357.8

(342.5,

373.8)

1.11

(0.93,

1.33)

40.1

Total

74

311.2

(272.4,

355.6)

1210

242.1

(233.4,

251.1)

1.29

(1.12,

1.48)

69.1

Angiography procedures

Female

34

260.9

(214.2,

317.8)

370

149.9

(140.6,

160.0)

1.74

(1.41,

2.14)

111.0

Male

46

415.6

(350.9,

492.1)

772

384.8

(368.5,

401.8)

1.08

(0.91,

1.29)

30.8

Total

79

338.2

(297.4,

384.7)

1142

267.4

(257.9,

277.2)

1.27

(1.11,

1.45)

70.9

Angioplasty procedures

Female

10

79.0

(55.4,

112.7)

101

37.0

(32.6,

42.0)

2.14

(1.47,

3.11)

42.0

Male

16

151.7

(114.3,

201.4)

323

163.5

(152.9,

174.8)

0.93

(0.69,

1.24)

-11.8

Total

27

115.4

(92.4,

144.1)

424

100.3

(94.5,

106.4)

1.15

(0.91,

1.45)

15.1

Coronary Artery Bypass Graft (CABG)

Female

3

20.8

(10.4,

41.7)

23

9.4

(7.3,

12.2)

2.21

(1.05,

4.63)

11.4

Male

7

59.7

(38.5,

92.8)

106

51.3

(45.7,

57.5)

1.17

(0.74,

1.84)

8.5

Total

9

40.3

(27.7,

58.5)

129

30.4

(27.3,

33.7)

1.33

(0.90,

1.95)

9.9

Acute coronary syndrome admissions

Female

20

148.4

(114.7,

192.1)

266

72.2

(66.2,

78.7)

2.06

(1.57,

2.70)

76.2

Male

28

251.7

(202.6,

312.6)

466

212.7

(200.9,

225.3)

1.18

(0.95,

1.48)

38.9

Total

47

200.0

(169.3,

236.3)

732

142.5

(135.8,

149.5)

1.40

(1.18,

1.67)

57.6

Source: NMDS.
Note: Ratios in bold show that Māori rates were significantly different from non-Māori rates in the DHB.

On average, 74 Māori per year were admitted to hospital for ischaemic heart disease (IHD), at a rate 29% higher than non-Māori. Of those admitted for IHD, 47 Māori admissions per year were for acute coronary syndrome (ACS). Māori women had twice the risk of admission for ACS of non-Māori women (76 more admissions per 100,000). However, for both IHD and ACS admission rates were higher for men than for women.

There were 79 angiography procedures conducted for Māori patients per year on average, at a rate 27% higher than the non-Māori rate. On average, 27 Māori per year had angioplasty procedures, with the rate for Māori women more than twice the non-Māori rate. Nine Māori per year had a CABG, with the rate for males more than double that of females. Māori women had twice the rate of CABG of non-Māori women.

Table : Hospitalisations for heart failure, stroke, and hypertensive disease, 25 years and over, Auckland DHB, 2011–2013



Gender

Māori

Non-Māori

Māori/non-Māori

ratio (95% CI)



Rate difference

Ave. no. per year

Age-standardised

rate per 100,000 (95% CI)



Ave. no. per year

Age-standardised

rate per 100,000 (95% CI)



Heart failure

Female

26

192.9

(153.8,

241.9)

279

54.5

(49.8,

59.7)

3.54

(2.77,

4.51)

138.4

Male

47

434.1

(367.4,

512.9)

327

103.8

(96.6,

111.6)

4.18

(3.49,

5.01)

330.3

Total

72

313.5

(273.9,

358.8)

605

79.2

(74.8,

83.8)

3.96

(3.42,

4.58)

234.3

Stroke

Female

24

188.3

(149.1,

238.0)

358

101.4

(93.9,

109.5)

1.86

(1.45,

2.38)

86.9

Male

15

141.4

(105.6,

189.2)

330

126.6

(117.9,

135.8)

1.12

(0.83,

1.51)

14.8

Total

40

164.9

(137.3,

198.0)

687

114.0

(108.2,

120.1)

1.45

(1.20,

1.75)

50.9

Hypertensive disease

Female

7

58.1

(37.1,

91.1)

72

26.0

(22.1,

30.6)

2.24

(1.39,

3.61)

32.1

Male

5

46.3

(27.2,

78.7)

44

23.1

(19.0,

28.0)

2.01

(1.14,

3.53)

23.2

Total

11

52.2

(37.0,

73.6)

115

24.5

(21.7,

27.8)

2.13

(1.48,

3.07)

27.7

Source: NMDS.
Note: Ratios in bold show that Māori rates were significantly different from non-Māori rates in the DHB.

There were 72 admissions per year on average among Māori with heart failure, at 4 times the rate of non-Māori, or 234 more admissions per 100,000. Men were more likely to be admitted than women.

On average, 40 Māori per year were admitted for stroke. Māori women had nearly twice the risk of non-Māori women, or 87 more admissions per 100,000.

There were 11 Māori admissions per year on average for hypertensive disease, at a rate twice that of non-Māori, or 28 more admissions per 100,000.

Table : Hospitalisations for chronic rheumatic heart disease and heart valve replacements, 25 years and over, Auckland DHB, 2011–2013

Gender

Māori

Non-Māori

Māori/non-Māori

ratio (95% CI)



Rate difference

Ave. no. per year

Age-standardised

rate per 100,000 (95% CI)



Ave. no. per year

Age-standardised

rate per 100,000 (95% CI)



Chronic rheumatic heart disease

Female

2

18.7

(8.3,

42.1)

19

9.0

(6.8,

12.0)

2.07

(0.87,

4.90)

9.6

Male

2

20.4

(9.7,

42.8)

11

5.4

(3.7,

7.8)

3.78

(1.65,

8.66)

15.0

Total

4

19.5

(11.3,

33.8)

30

7.2

(5.7,

9.0)

2.71

(1.49,

4.91)

12.3

Heart valve replacements

Female

1

11.9

(4.4,

32.2)

21

8.6

(6.5,

11.4)

1.39

(0.50,

3.90)

3.3

Male

2

15.3

(6.3,

37.1)

41

18.3

(15.1,

22.2)

0.84

(0.34,

2.07)

-3.0

Total

3

13.6

(7.0,

26.4)

62

13.5

(11.5,

15.8)

1.01

(0.51,

2.00)

0.2

Source: NMDS.
Note: Ratios in bold show that Māori rates were significantly different from non-Māori rates in the DHB.

Māori had 2.7 times the non-Māori rate of admission for chronic rheumatic heart disease (CRHD) but similar rates of heart valve replacement. On average, four Māori per year were admitted for CRHD and three had heart valves replaced.

Table : Early deaths from circulatory system disease, Auckland DHB, 2007–2011

Gender

Māori

Non-Māori

Māori/non-Māori

ratio (95% CI)



Rate difference

Ave. no. per year

Age-standardised
rate per 100,000 (95% CI)

Ave. no. per year

Age-standardised
rate per 100,000 (95% CI)







Female

10

42.5

(32.3,

55.9)

48

12.2

(10.6,

14.0)

3.49

(2.56,

4.74)

30.3

Male

15

71.1

(56.6,

89.4)

123

33.1

(30.5,

35.9)

2.15

(1.69,

2.74)

38.1

Total

25

56.8

(47.6,

67.8)

171

22.6

(21.1,

24.3)

2.51

(2.08,

3.04)

34.2

Source: Mortality data, Ministry of Health
Notes: “Early deaths” are defined as those occurring under 75 years of age.
Ratios in bold show that Māori rates were significantly different from non-Māori rates in the DHB.

On average 25 Auckland Māori per year died early from circulatory system disease (including heart disease and stroke), at 2.5 times the rate of non-Māori, or 34 more deaths per 100,000. Males had higher mortality rates than females.





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