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Table 1 Numbers (%) of mothers by cause of death, demographics and Aboriginality

From: Early mortality from external causes in Aboriginal mothers: a retrospective cohort study

Variable

Aboriginal

Non-Aboriginal

Total

Cause of death

 External causea

197 (1.3 %)

668 (0.2 %)

865 (0.2 %)

 Other causesb

517 (3.3 %)

2,396 (0.7 %)

2,913 (0.8 %)

 All cause death

714 (4.6 %)

3,064 (0.9 %)

3,778 (1.0 %)

Aboriginal status

 

15, 606 (4.2 %)

358,239 (95.8 %)

373,845 (100 %)

Socio-economic status by quintile

 Missing

964 (6.2 %)

14,344 (4.0 %)

15,308 (4.1 %)

 Very high

384 (2.5 %)

76,588 (21.4 %)

76,972 (20.6 %)

 High

934 (6.0 %)

72,629 (20.3 %)

73,565 (19.7 %)

 Medium

1,568 (10.1 %)

72,512 (20.2 %)

74,080(19.8 %)

 Low

2,698 (17.3 %)

68,385 (19.2 %)

71,533 (19.1 %)

 Disadvantaged

9,058 (58.0 %)

53,331 (14.9 %)

62, 389 (16.7 %)

Maternal age (in years) at the index birth

 Less than 15

96 (0.6 %)

47 (0.01 %)

143 (0.04 %)

 15 & < 20

2,314 (14.8 %)

8,643 (2.4 %)

10,957 (2.9 %)

 20 & < 25

4,317 (27.7 %)

42,614 (11.9 %)

46,931 (12.6 %)

 26 & < 30

4,225(27.1 %)

103,098 (28.8 %)

107,323 (28.7 %)

 31 & < 35

2,914 (18.7 %)

124,438 (34.7 %)

127,352 (34.1 %)

 36 & < 40

1,444 (9.3 %)

66,072 (18.4 %)

67,516 (18.1 %)

 40 & over

296 (1.9 %)

13,327 (3.7 %)

13,623 (3.6 %)

Parity at the index birth

 No previous child

3,182 (20.4 %)

88,766 (24.8 %)

91,948 (24.6 %)

 One previous child

3,108 (19.9 %)

146,281 (40.8 %)

149,389 (40.0 %)

 2-3 previous children

5,451 (34.9 %)

109,167 (30.5 %)

114,618 (30.7 %)

 4-6 previous children

3,284 (21.0 %)

13,210 (3.7 %)

16,494 (4.4 %)

 >7 previous children

581 (3.7 %)

815 (0.2 %)

1,396 (0.4 %)

Remoteness

 Missing

689 (4.4 %)

9,242 (2.6 %)

9,931 (2.7 %)

 Urban

3,642 (23.3 %)

227,002 (63.4 %)

230,644 (61.7 %)

 Rural/outer urban

1,614 (10.3 %)

62,440 (17.4 %)

64,054 (17.1)

 Distant

1,886 (12.1 %)

27,970 (7.8 %)

29,856 (8.0 %)

 Remote

2,079 (13.3 %)

16,041 (4.5 %)

18,120 (4.9 %)

 Very remote

5,696 (36.5 %)

15,544 (4.3 %)

21,240 (5.7 %)

Year of birth of index child

 1983–1986

1,231 (7.9 %)

37,641 (10.5 %)

38,872 (10.4 %)

 1987–1990

1,544 (9.9 %)

41,939 (11.7 %)

43,483 (11.6 %)

 1991–1994

1,463 (9.4 %)

43,035 (12.0 %)

44,498 (11.9 %)

 1995–1998

1,580 (10.1 %)

44,928 (12.5 %)

46,508 (12.4 %)

 1999–2002

1,915 (12.3 %)

45,010 (12.6 %)

46,925 (12.6 %)

 2003–2006

2,440 (15.6 %)

50,418 (14.1 %)

52,858 (14.1 %)

 2007–2010

5,433 (34.8 %)

95,268 (26.6 %)

100,701 (26.9 %)

 Total

15,606 (100 %)

358,239 (100 %)

373,845 (100 %)

  1. aExternal cause: Associated ICD-9 and 10 codes are listed in Additional file 1: Table S1
  2. b Other causes refers to death with an associated code from ICD-9 codes: E870-E879, E930-E949, E980-E984, E985.5-E998 or ICD-10 codes: Y10-Y84, Y87.2-Y98 [20]