Skip to main content

Table 1 Demographic characteristics of the subjects

From: Cognitive function and number of teeth in a community-dwelling population in Japan

  Poor cognition (n= 26) Control (n= 436)
MMSE* 21.0 ± 2.0 28.6 ± 1.7
Age (years)* 73.7 ± 7.9 68.3 ± 6.2
Gender Male 12, female 14 Male 151, female 285
Level of education (years)* 8.7 ± 1.5 10.8 ± 1.9
Smoking status   
  No 18 339
  Current 2 31
  Previous 6 66
Habitual alcohol intake   
  No 14 273
  Current 11 149
  Previous 1 14
Positive history of   
  Diabetes mellitus 3 (11.5%) 44 (10.1%)
  Hypertension 13 (50.0%) 201 (46.1%)
  Cancer 3 (11.5%) 34 (7.8%)
TMIG-IC score   
  Instrumental self-maintenance 4.6 ± 0.8 4.9 ± 0.3
  Intellectual activity* 2.9 ± 1.1 3.6 ± 0.7
  Social role 3.4 ± 1.0 3.7 ± 0.6
CES-D total score 11.9 ± 7.1 10.3 ± 5.9
Number of remaining teeth* 5.8 ± 7.3 16.2 ± 9.7
Number of teeth lost* 22.3 ± 7.1 11.9 ± 9.6
  1. Student's unpaired t test for continuous variables or chi-square test for categorical variables was used to evaluate the differences between poor cognition (MMSE ≤ 23) and control (MMSE ≥ 24). Values for the different tests are presented as mean ± S.D. MMSE Mini-Mental State Examination, TMIG-IC Tokyo Metropolitan Institute of Gerontology Index of Competence, CES-D Center for Epidemiologic Studies for Depression scale. *p < 0.05.