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Table 1 Baseline characteristics of Fremantle Diabetes Study Phase 1 (FDS1) and 2 (FDS2) participants with type 2 diabetes

From: Temporal changes in the prevalence and associates of diabetes-related lower extremity amputations in patients with type 2 diabetes: the Fremantle Diabetes Study

 

FDS1

FDS2

Difference (95 % CI)

P-value*

Number

1296

1509

  

Age (years)

64.0 ± 11.3

65.4 ± 11.7

1.4 (0.6–2.3)

<0.001

Sex (% male)

48.6

51.8

3.2 (−0.5 to 6.9)

0.032

Ethnic background (%)

 Anglo-Celt

61.4

52.6

−8.9 (−12.5 to −5.2)

<0.001

 Southern European

17.7

12.9

−4.9 (−7.6 to −2.2)

<0.001

 Other European

8.5

7.4

−1.1 (−0.9 to 3.1)

0.20

 Asian

3.4

4.3

0.9 (−0.5 to 2.3)

0.14

 Aboriginal

1.5

7.1

5.6 (4.2–7.1)

<0.00

 Other

7.5

15.8

8.4 (6.0–10.7)

<0.001

Age at diabetes diagnosis (years)

57.9 ± 11.7

55.6 ± 12.4

−2.3 (−3.2 to 1.4)

<0.001

Duration of diabetes (years)

4.0 (1.0–9.0)

8.0 (2.7–15.4)

3.7 (3.2–4.3)

<0.001

Education beyond primary level (%)

74.0

86.8

12.8 (9.8–15.7)

<0.001

Paid employment (%)

17.5

31.0

13.6 (10.4–16.7)

<0.001

Married/de facto relationship (%)

65.7

62.7

−3.0 (−6.5 to 0.6)

0.79

Alcohol use (standard drinks/day)

0 (0–0.8)

0.1 (0–1.2)

0.2 (0.1–0.4)

0.003

Smoking status (%)

 Never

44.7

45.4

0.7 (−3.0 to 4.4)

0.054

 Ex-

40.2

43.9

3.6 (−0.03 to 7.3)

0.29

 Current

15.1

10.7

−4.5 (−7.0 to −2.0)

<0.001

BMI (kg/m2)

29.6 ± 5.4

31.3 ± 6.1

1.7 (1.3–2.1)

<0.001

Obese by waist circumference (%)a

64.5

70.9

6.4 (2.9–9.9)

<0.001

Overweight/obese by waist:hip ratio (%)b

74.2

82.7

8.5 (5.4–11.6)

<0.001

Fasting serum glucose (mmol/L)

8.0 (6.5–10.3)

7.2 (6.2–8.9)

−0.8 (−1.0 to −0.6)

<0.001

HbA1c (%)

7.2 (6.2–8.5)

6.8 (6.2–7.7)

−0.3 (−0.4 to −0.2)

<0.001

HbA1c (mmol/mol)

55 (44–69)

51 (44–61)

−3.5 (−4.8 to −2.1)

<0.001

Diabetes treatment (%)

 Diet

31.9

24.6

−7.3 (−10.7 to −4.0)

<0.001

 Oral agents

56.0

53.4

−2.6 (−6.3 to 1.1)

0.075

 Insulin ± oral agents

12.1

22.0

9.9 (7.2–12.7)

<0.001

Systolic blood pressure (mmHg)

151 ± 24

146 ± 22

−5.1 (−6.8 to −3.4)

<0.001

Diastolic blood pressure (mmHg)

80 ± 11

80 ± 12

−0.3 (−1.1 to 0.6)

0.66

On antihypertensive therapy (%)

50.9

72.6

21.7 (18.2–25.2)

<0.001

On renin-angiotensin blockers (%)

21.8

64.3

42.4 (39.1–45.8)

<0.001

Total serum cholesterol (mmol/L)

5.5 ± 1.1

4.4 ± 1.1

−1.1 (−1.2 to −1.0)

<0.001

Serum HDL cholesterol (mmol/L)

1.06 ± 0.3

1.24 ± 0.3

0.18 (0.15–0.20)

<0.001

Serum LDL cholesterol (mmol/L)

3.3 ± 0.91

2.3 ± 0.9

−1.0 (−1.1 to −0.9)

<0.001

Serum triglycerides (mmol/L)

2.2 (1.2–3.9)

1.5 (0.9–2.5)

−0.9 (−1.0 to −0.7)

<0.001

On lipid modifying treatment (%)

10.5

67.5

56.9 (54.0–59.8)

<0.001

Taking aspirin (%)

22.0

36.6

14.6 (11.3–17.9)

<0.001

Microalbuminuria or worse (%)

56.4

40.0

−16.4 (−20.0 to −12.7)

<0.001

eGFR <60 mL/min/1.73 m2 (%)

24.2

16.5

–7.8 (−10.8 to −4.8)

<0.001

Any retinopathy (%)

16.4

22.4

6.0 (3.0–9.1)

0.001

Peripheral sensory neuropathy (%)

30.8

58.2

27.4 (23.9–31.0)

<0.001

Ischaemic heart disease (%)

29.6

27.8

−1.8 (−5.1 to 1.6)

0.32

Cerebrovascular disease (%)

10.0

8.5

−1.4 (−3.6 to 0.8)

0.21

Peripheral arterial disease (%)

29.3

22.6

−6.7 (−10.0 to −3.5)

<0.001

Intermittent claudication (%)

14.0

9.2

−4.8 (−7.2 to −2.4)

<0.001

Arterial bypass/revascularisation (%)

1.3

3.0

1.7 (0.7–2.8)

0.013

Past hospitalisation for/current foot ulcer

1.6

2.8

1.2 (0.1–2.3)

0.17

Diabetes-related LEA (%)

1.2

1.0

−0.2 (−0.9 to 0.6)

0.22

Diabetes-related major LEA (%)

0.6

0.3

−0.3 (−0.8 to 0.2)

0.07

Diabetes-related minor LEA (%)

0.5

0.7

0.1 (−0.5 to 0.7)

0.90

  1. Data are proportions, mean ± SD, geometric mean (SD range), median (IQR) or mean difference (95 % CI)
  2. aWaist circumference ≥102.0 cm males, ≥88.0 cm females
  3. bWaist:hip ratio ≥0.95 males, ≥0.80 females
  4. * Age-, sex- and ethnicity-adjusted for interaction between Phases