Skip to main content

Table 1 Baseline characteristics of participants in the whole MAS sample (N = 1037), selected sample (N = 339) and unselected sample (N = 698)

From: Memory decline in older individuals predicts an objective indicator of oral health: findings from the Sydney Memory and Ageing Study

 

Wholea sample (N = 1037)

Selectedb sample (N = 339)

Unselectedc sample (N = 698)

Difference between selected and unselected

Variables

Mean (SD)/n(%)

Mean (SD)/n(%)

Mean (SD)/n(%)

p value#

Age

78.3 (4.8)

76.1 (3.9)

79.4 (4.8)

 < .001

Female

572 (55.1%)

203 (59.8%)

369 (52.8%)

.033

Education in years

11.6 (3.4)

11.8 (3.4)

11.4 (3.5)

.086

MMSE

28.7 (1.3)

28.8 (1.3)

28.7 (1.4)

.185

Medical conditions

    

 Ever had stroke

41 (3.9%)

9 (2.6%)

32 (4.6%)

.139

 Ever had diabetes

126 (12.2%)

32 (9.4%)

94 (13.5%)

.057

 Ever had hypertension

629 (60.8%)

200 (59.3%)

429 (61.6%)

.479

 Heart diseases

    

  Ever had CAD

198 (19.0%)

48 (14.1%)

150 (21.4%)

.005

  Ever had AF

69 (6.7%)

17 (5.1%)

52 (7.5%)

.146

 Lung disease

    

  Ever had COPD

20 (1.9%)

4 (1.1%)

16 (2.2%)

.222

General health

   

< .001

 Excellent

104 (10.0%)

38 (11.2%)

66 (9.4%)

 

 Very good

323 (31.2%)

127 (37.5%)

196 (28.1%)

 

 Good

436 (42.1%)

138 (40.8%)

298 (42.8%)

 

 Fair

154 (14.8%)

33 (9.7%)

121 (17.3%)

 

 Poor

17 (1.6%)

2 (0.5%)

15 (2.1%)

 

GDS

2.2 (2.0)

1.8 (1.7)

2.5 (2.1)

< .001

Smoking status

   

< .001

 Current smoker

40 (4.5%)

11 (3.2%)

29 (5.3%)

 

 Past smoker

514 (58.4%)

160 (47.2%)

354 (65.5%)

 

 Never smoker

325 (36.9%)

168 (49.5%)

157 (29.0%)

 

Alcohol consumption

   

.965

 Abstainer (0 drinks)

130 (12.5%)

43 (12.6%)

87 (12.4%)

 

  ≤ 1 standard drink per day

391 (37.7%)

126 (37.1%)

265 (38.0%)

 

  > 1 standard drink

515 (49.7%)

170 (50.1%)

345 (49.5%)

 

Functional impairment

    

 IADL

14 (2.0%)

5 (2.2%)

9 (1.9%)

.753

 ADL

92 (9.4%)

17 (5.1%)

75 (11.6%)

.001

  1. n number of participants, SD Standard Deviation, MMSE Mini Mental State Examination, CAD Coronary Artery, Disease, AF Atrial Fibrillation, COPD Chronic Obstructive Pulmonary Disease, GDS Geriatric Depression Scale, IADL Instrumental Activities of Daily Living, ADL Activities of Daily Living
  2. aRefers to all participants at baseline (Wave 1)
  3. bRefers to only those participants included in the present study for analysis
  4. cRefers to excluded participants in the study (e.g., those not followed up, people who developed dementia, people who did not have oral health data)
  5. #Independent t-test or Mann–Whitney U-test (if skewed) was conducted for continuous variables. Chi-square-difference test was conducted for categorical variables
  6. *p ≤ .05, **p < .01, ***p < .001
Back to article page

BMC Oral Health

ISSN: 1472-6831

Contact us