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Table 1 Demographic characteristics of the subjects participating in this stud

From: Effects of self-assessed chewing ability, tooth loss and serum albumin on mortality in 80-year-old individuals: a 20-year follow-up study

  Men (n = 233) Women (n = 375) P-value Total
Continuous variable
Number of remaining teeth Mean SD 7.20 ± 8.71 3.09 ± 5.91 < 0.001 4.67 ± 8.70
Median 3 0 0
(25th–75th) (0–13) (0–3) (0–8)
Serum levels of albumin
(g/dL)
Mean SD 4.20 ± 0.31 4.20 ± 0.26 0.906 4.20 ± 0.31
Median 4.2 4.2 4.2
(25th–75th) (4.00–4.40) (4.10–4.40) (4.10–4.40)
BMI Mean SD 22.70 ± 3.26 23.67 ± 3.64 0.003 23.29 ± 3.26
Median 22.66 23.47 23.11
(25th–75th) (20.28–24.73) (21.36–25.92) (20.83–25.57)
Life expectancy (days) Mean SD 2641 ± 1483 2930 ± 1582 0.017 2819 ± 1550
Median 2502 2711 2603
(25th–75th) (1707–3605) (1830–3699) (1798–3694)
Categorical variables
 Dentulous or edentulous
  Edentulous 104 (44.6%) 243 (64.8%) < 0.001 347 (57.1%)
  Dentulous 129 (55.4%) 132 (35.2%) 261 (42.9%)
Self-reported smoking status
 Current 57 (24.7%) 9 (2.4%) < 0.001 66 (11.0%)
 Previous or never 174 (75.3%) 361 (97.5%) 535 (89.0%)
Self-reported alcohol consumption
 Daily 78 (31.1%) 23 (5.6%) < 0.001 101 (15.3%)
 More than three days per week 9 (3.6%) 6 (1.5%) 15 (2.3%)
 One or two days per week 29 (11.6%) 16 (3.9%) 45 (6.8%)
 Less than 3 days per month 6 (2.4%) 9 (2.2%) 15 (2.3%)
 Almost never 35 (13.9%) 35 (8.5%) 70 (10.6%)
 Never 75 (29.9%) 283 (68.9%) 358 (54.1%)
 Missing 19 (7.6%) 39 (9.5%) 58 (8.8%)
BMI
 Severe thinness 1 (0.5%) 0 (0.0%) 0.098 1 (0.2%)
 Moderate thinness 3 (1.4%) 5 (1.5%) 8 (1.5%)
 Mild thinness 13 (6.1%) 18 (5.4%) 31 (5.6%)
 Normal range 148 (69.2%) 204 (60.7%) 352 (64.0%)
 Preobese 46 (21.5%) 90 (26.8%) 136 (24.7%)
 Obese class I 3 (1.4%) 17 (5.1%) 20 (3.6%)
 Obese class II 0 (0.0%) 2 (0.6%) 2 (0.4%)
  1. For continuous variables, differences by sex were evaluated by Mann-Whitney U tests, as the data were not normally distributed in the Kolmogorov-Smirnov results
  2. For categorical variables, p-values were calculated by chi-square tests
  3. Differences between men and women in life expectancy were statistically significant. Differences between men and women in the number of remaining teeth and “dentulous or edentulous” were statistically significant