Table 1 Baseline characteristics according to the severity of hearing loss.

From: Association between the severity of hearing loss and the risk of dementia within the 2010–2017 national insurance service survey in South Korea

n

Normal

Ipsilateral HD

Non-severe HD

Severe HD

p value

191,202

32,207

86,905

72,090

Age (years)

65.91 ± 11.47

63.86 ± 10.95

68.04 ± 10.95

64.24 ± 11.85

 < .0001

 ≥ 65 (%)

111,192 (58.15)

16,310 (50.64)

57,143 (65.75)

37,739 (52.35)

 < .0001

Sex, male (%)

10,1093 (52.87)

18,173 (56.43)

44,858 (51.62)

38,062 (52.8)

 < .0001

Income, lowest 20% (%)

38,977 (20.39)

8277 (25.70)

23,218 (26.72)

24,286 (33.69)

 < .0001

Diabetes (%)

25,548 (13.36)

4765 (14.79)

13,335 (15.34)

8919 (12.37)

 < .0001

Hypertension (%)

80,147 (41.92)

13,248 (41.13)

39,874 (45.88)

27,600 (38.29)

 < .0001

Dyslipidaemia (%)

30,870 (16.15)

5621 (17.45)

14,624 (16.83)

9696 (13.45)

 < .0001

COPD (%)

21,210 (11.09)

4347 (13.50)

13,406 (15.43)

9628 (13.36)

 < .0001

IHD (%)

20,945 (10.95)

3851 (11.96)

11,450 (13.18)

7390 (10.25)

 < .0001

Stroke (%)

9631 (5.04)

1805 (5.6)

6169 (7.10)

4200 (5.83)

 < .0001

CHF (%)

4597 (2.40)

790 (2.45)

3045 (3.50)

2030 (2.82)

 < .0001

AF (%)

3088 (1.62)

546 (1.70)

1787 (2.06)

1173 (1.63)

 < .0001

ESRD (%)

71 (0.04)

23 (0.07)

86 (0.10)

243 (0.34)

 < .0001

Cancer (%)

7240 (3.79)

1363 (4.23)

3665 (4.22)

2432 (3.37)

 < .0001

Outcome

Dementia (%)

24,326 (12.72)

4254 (13.21)

16,275 (18.73)

10,435 (14.47)

 < .0001

AD (%)

18,558 (9.71)

3140 (9.75)

12,288 (14.14)

7904 (10.96)

 < .0001

VD (%)

2596 (1.36)

499 (1.55)

1781 (2.05)

1145 (1.59)

 < .0001

OD (%)

3172 (1.66)

615 (1.91)

2206 (2.54)

1386 (1.92)

 < .0001

F/U duration (year)

6.97 ± 2.1

7.04 ± 2.04

6.58 ± 2.35

6.79 ± 2.24

 < .0001

  1. HD, hearing disability; COPD, chronic obstructive pulmonary disease; IHD, ischemic heart disease; CRF, chronic heart failure; AF, atrial fibrillation; ESRD, end-stage renal disease; AD, Alzheimer’s dementia; VD, vascular dementia; OD, other causes of dementia; F/U, follow-up.