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Table 1 Characteristics of the follow-up and drop-out groups

From: Association between tooth loss and cognitive impairment in community-dwelling older Japanese adults: a 4-year prospective cohort study from the Ohasama study

  Follow-up (n = 140) Drop-out (n = 176) P-value
Age (mean ± SD) 70.9 ± 4.3 73.2 ± 4.8 < 0.0001
Male (%) 30.7 29.0 0.7
Hypertension (%) 53.6 66.5 0.02
Diabetes (%) 11.4 17.6 0.1
Cerebrovascular/cardiovascular disease (%) 12.9 15.3 0.5
Hypercholesterolemia (%) 60.7 54.0 0.2
Depressive symptoms (%) 10.7 10.2 0.9
BMI (mean ± SD) 23.6 ± 3.2 23.9 ± 2.8 0.4
Current smoker (%) 7.1 5.7 0.6
Current drinker (%) 39.3 32.4 0.2
< 10 years of education (%) 73.6 76.7 0.5
Baseline MMSE score (mean ± SD) 27.7 ± 1.6 27.8 ± 1.5 0.4
Multiple tooth loss (%) 50.7 46.6 0.5
  1. P-values were determined with Student’s t-test or the Wilcoxon rank sum test for continuous variables and the chi-squared test for categorical variables. Multiple tooth loss was defined as having 0–9 remaining teeth
  2. BMI body mass index, MMSE Mini-Mental State Examination, SD standard deviation