Table 1 Characteristics by gender.

From: Oral Cnm-positive Streptococcus Mutans Expressing Collagen Binding Activity is a Risk Factor for Cerebral Microbleeds and Cognitive Impairment

Variable

Males (n = 189)

Females (n = 90)

Total (n = 279)

n (%)

n (%)

n (%)

Clinical characteristics

 Age (years) ± SD

70.2 ± 6.1

68.6 ± 6.0*

70.0 ± 6.1

 Age (range)

54–87

60–89

54–89

 BMI (kg/m2) ± SD

23.1 ± 2.7

22.0 ± 3.2**

22.7 ± 3.0

 Hypertension

104 (55)

41 (46)

145 (52)

 Hyperlipidemia

111 (59)

54 (60)

165 (59)

 Diabetes mellitus

30 (16)

5 (5.6)*

35 (13)

 History of stroke

4 (2.1)

1 (1.1)

5 (1.8)

 History of cardiovascular disease

10 (5.3)

4 (4.4)

14 (5.0)

 Antiplatelet therapy

23 (12)

6 (6.7)

29 (10)

 Anticoagulant therapy

10 (5.3)

1 (1.1)

11 (3.9)

 Drinking

138 (73)

43 (48)**

181 (65)

 Smoking

27 (14)

4 (4.4)*

31 (11)

 Education ≤12 yearsa

92 (49)

58 (66)**

150 (55)

 baPWV (m/s) ± SD

1758 ± 228.2

1691 ± 333.4

1736 ± 304.6

 hs-CRP ≥ 0.1 mg/dL

50 (27)

27 (30)

77 (28)

Dental check-up findings

 Number of remaining teeth ± SD

22.8 ± 7.7

22.5 ± 6.9

22.7 ± 7.5

 Dental caries+

69 (37)

17 (19)**

86 (31)

 CPI ≥ code 3

55 (29)

22 (24)

77 (28)

Laboratory evaluations

 APOE ε4 allele carrierb

35 (19)

23 (26)

58 (21)

Streptococcus mutans-isolated

171 (91)

90 (100)**

261 (94)

cnm-positive S. mutans-isolated

57 (30)

34 (38)

91 (33)

 Collagen binding activity ≥10%

45 (24)

26 (29)

71 (25)

Brain MRI findings

 CMBs

49 (26)

24 (27)

73 (26)

 PVH ≥ grade 2

24 (13)

11 (12)

35 (13)

 DWMH ≥ grade 2

51 (27)

26 (29)

77 (28)

Cognitive functional evaluations

 MMSE (score) ± SD

28.6 ± 1.9

27.9 ± 2.5*

28.3 ± 2.1

Letter fluency tasks

 “Ta” (score) ± SD

8.3 ± 3.1

8.1 ± 3.9

8.2 ± 3.3

 “Ka” (score) ± SD

9.9 ± 3.4

9.5 ± 3.3

9.8 ± 3.4

  1. *T-tests p < 0.05 and Chi-square tests p < 0.05, **T-tests p < 0.01 and Chi-square tests p < 0.01.
  2. aData are missing for education (n = 4). bData are missing for APOE genotype (n = 7).
  3. BMI; Body mass index, CPI; Community Periodontal Index, CMBs; Cerebral microbleeds.
  4. PVH; Periventricular Hyperintensity, DWMH; Deep White Matter Hyperintensity, MMSE; Mini-Mental State Examination.