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Table 3 Distribution of participant characteristics and their association with Aβ misfolding and clinical Alzheimer’s disease

From: Aβ misfolding in blood plasma is inversely associated with body mass index even in middle adulthood

 

Aβ misfolding

clinical Alzheimer’s disease

Characteristic at baseline

Ntotal

(col %)

NAbeta+

(row %)

OR (95% CI)

p-valueb

Ntotal

(col %)

NAD

(row %)

OR (95% CI)

p-valueb

Adjusteda

Adjustedc

Diabetes

No

686 (78.7)

100 (14.6)

Ref.

 

5066 (85.6)

116 (2.3)

Ref.

 

Yes

186 (21.3)

31 (16.7)

1.02 (0.59–1.77)

.9357

855 (14.4)

30 (3.5)

1.10 (0.65–1.87)

.7144

Physical activity

Inactive

278 (31.9)

35 (12.6)

Ref.

 

1110 (18.6)

49 (4.4)

Ref.

 

Low

420 (48.2)

68 (16.2)

1.44 (0.82–2.53)

.2088

2705 (45.3)

57 (2.1)

0.57 (0.39–0.85)

.0056

Medium/high

173 (19.9)

28 (16.2)

1.14 (0.58–2.25)

.6978

2158 (36.1)

40 (1.9)

0.64 (0.41–1.01)

.0548

Smoking

Never

462 (54.9)

66 (14.3)

Ref.

 

2974 (50.8)

83 (2.8)

Ref.

 

Former

281 (33.4)

47 (16.7)

1.07 (0.61–1.87)

.8103

1975 (33.7)

42 (2.1)

0.89 (0.59–1.35)

.5957

Current

98 (11.7)

17 (17.4)

1.19 (0.57–2.47)

.6452

908 (15.5)

16 (1.8)

1.07 (0.61–1.86)

.8212

Frailty index

Non-frail

0 to ≤0.20

206 (38.8)

31 (15.1)

Ref.

 

2337 (53.0)

39 (1.7)

Ref.

 

Pre-frail

> 0.20 to < 0.45

253 (47.7)

50 (19.8)

1.14 (0.68–1.91)

.6132

1742 (39.5)

45 (2.6)

1.11 (0.71–1.72)

.6468

Frail

≥0.45

72 (13.6)

9 (12.5)

0.75 (0.35–1.58)

.6452

330 (7.5)

15 (4.6)

2.02 (1.103.95)

.0275

  1. aAdjusted for all variables listed in Table 1 and case/control status
  2. bp-value derived from multiple logistic regression for adjusted odds ratios
  3. cAdjusted for all variables listed in Table 1