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Table 1 Social and demographic characteristics of the 45 and Up Study and the NSW PHS populations

From: Investigation of relative risk estimates from studies of the same population with contrasting response rates and designs

 

45 and Up Study

PHS

Social and Demographics

      

Characteristics a

N

Crude % (95% CI)

Weighted b % (95% CI)

N

Crude % (95% CI)

Weighted c % (95% CI)

Sex

      

Male

48851

48.0 (47.7, 48.3)

48.0 (47.6, 48.4)

5766

39.0 (38.2, 39.8)

48.4 (47.4, 49.5)

Female

52961

52.0 (51.7, 52.3)

52.0 (51.6, 52.4)

9030

61.0 (60.2, 61.8)

51.6 (50.5, 52.6)

Age

      

45-49 years

12399

12.2 (12.0, 12.4)

18.9 (18.6, 19.2)

1803

12.2 (11.7, 12.7)

19.3 (18.3, 20.3)

50-54 years

16120

15.8 (15.6, 16.1)

17.1 (16.8, 17.4)

2043

13.8 (13.3, 14.4)

17.5 (16.6, 18.4)

55-59 years

17350

17.0 (16.8, 17.3)

15.9 (15.7, 16.2)

2188

14.8 (14.2, 15.4)

16.2 (15.4, 17.0)

60-64 years

15342

15.1 (14.8, 15.3)

12.6 (12.4, 12.8)

2252

15.2 (14.6, 15.8)

12.5 (11.9, 13.1)

65-69 years

12800

12.6 (12.4, 12.8)

10.1 (9.9, 10.3)

1939

13.1 (12.6, 13.6)

10.2 (9.6, 10.8)

70-74 years

9564

9.4 (9.2, 9.6)

8.3 (8.1, 8.5)

1710

11.6 (11.0, 12.1)

8.5 (8.0, 8.9)

75-79 years

7235

7.1 (6.9, 7.3)

7.3 (7.2, 7.5)

1490

10.1 (9.6, 10.6)

7.3 (6.9, 7.8)

80-84 years

7545

7.4 (7.2, 7.6)

5.4 (5.3, 5.6)

922

6.2 (5.8, 6.6)

5.9 (5.4, 6.3)

≥ 85 years

3457

3.4 (3.3, 3.5)

4.3 (4.1, 4.4)

449

3.0 (2.8, 3.3)

2.6 (2.3, 2.9)

Remoteness (ARIA+)

      

Major City

44146

43.4 (43.1, 43.7)

69.1 (68.8, 69.4)

6718

45.4 (44.6, 46.2)

60.6 (59.6, 61.6)

Inner Regional

36640

36.0 (35.7, 36.3)

22.7 (22.5, 23.0)

4351

29.4 (28.7, 30.1)

24.4 (23.5, 25.2)

Outer Regional

18926

18.6 (18.4, 18.8)

7.6 (7.5, 7.7)

3086

20.9 (20.2, 21.5)

12.2 (11.6, 12.7)

Remote

2100

2.1 (2.0, 2.1)

0.6 (0.5, 0.6)

456

3.1 (2.8, 3.4)

1.3 (1.2, 1.5)

Missing

0

-

-

185

1.3 (1.1, 1.4)

1.5 (1.2, 1.8)

Language other than English spoken at home

      

No

92230

90.6 (90.4, 90.8)

87.4 (87.1, 87.7)

13379

93.0 (92.6, 93.4)

89.5 (88.7, 90.3)

Yes

9580

9.4 (9.2, 9.6)

12.6 (12.3, 12.9)

986

6.9 (6.4, 7.3)

10.4 (9.6, 11.2)

Missing

2

0.0 (0.0, 0.0)

0.0 (0.0, 0.0)

17

0.1 (0.0, 0.2)

0.1 (0.0, 0.2)

Country of Birth

      

Australia

75821

74.5 (74.2, 74.7)

70.8 (70.5, 71.1)

11332

76.6 (75.9, 77.3)

71.1 (70.1, 72.2)

Not Australia

24964

24.5 (24.3, 24.8)

28.2 (27.9, 28.6)

3433

23.2 (22.5, 23.9)

28.7 (27.7, 29.7)

Missing

1027

1.0 (0.9, 1.1)

1.0 (0.9, 1.0)

24

0.2 (0.1, 0.2)

0.2 (0.1, 0.2)

Private Health Insurance

      

No

38300

37.6 (37.3, 37.9)

33.9 (33.6, 34.3)

6766

45.7 (44.9, 46.5)

41.5 (40.4, 42.5)

Yes

63508

62.4 (62.1, 62.7)

66.1 (65.7, 66.4)

7973

53.9 (53.1, 54.7)

58.2 (57.1, 59.3)

Missing

4

0.0 (0.0, 0.0)

0.0 (0.0, 0.0)

57

0.4 (0.3, 0.5)

0.3 (0.2, 0.4)

Educational Attainment

      

No School Certificate

12385

12.2 (12.0, 12.4)

10.9 (10.7, 11.1)

2017

13.7 (13.1, 14.2)

11.7 (11.1, 12.3)

School Certificate

22608

22.2 (22.0, 22.5)

20.3 (20.0, 20.6)

3732

25.3 (24.6, 26.0)

20.6 (19.8, 21.4)

Trade/Certificate/Diploma

32289

31.7 (31.4, 32.0)

31.0 (30.6, 31.3)

1631

26.5 (25.8, 27.2)

29.5 (28.5, 30.5)

Higher School Certificate

9787

9.6 (9.4, 9.8)

10.1 (9.9, 10.3)

3902

11.1 (10.6, 11.6)

10.9 (10.2, 11.6)

Tertiary Qualification

22802

22.4 (22.1, 22.7)

25.9 (25.6, 26.3)

3096

21.0 (20.3, 21.7)

25.0 (24.0, 26.0)

Missing

1941

1.9 (1.8, 2.0)

1.8 (1.8, 1.9)

360

2.4 (2.2, 2.7)

2.3 (2.0, 2.6)

Household Income

      

<$20,000 p.a

20633

20.3 (20.0, 20.5)

17.9 (17.6, 18.1)

4505

30.4 (29.7, 31.2)

22.2 (21.4, 22.9)

$20,000-$39,999 p.a

18386

18.1 (17.8, 18.3)

15.3 (15.1, 15.6)

3145

21.3 (20.6, 21.9)

20.3 (19.5, 21.1)

≥$40,000 p.a

39792

39.1 (38.8, 39.4)

44.6 (44.2, 44.9)

4768

32.2 (31.5, 33.0)

41.4 (40.3, 42.5)

Missing

23001

22.6 (22.3, 22.8)

22.2 (21.9, 22.5)

2378

16.1 (15.5, 16.7)

16.2 (15.4, 17.0)

  1. ARIA+, Accessibility Remoteness Index of Australia; CI, Confidence Interval; p.a, per annum
  2. a Characteristics above the line-break are highly comparable across the two surveys. Characteristics below the line-break are moderately comparable across the two surveys. Weighted prevalence estimates for age, sex and remoteness differ across the two studies since the weighting schemes vary.
  3. b Weighted by age, sex and remoteness
  4. c Weighted by area health service, probability of selection in the household and the number of residential connections to the house