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Table 1 Descriptive statistics for the sample according to the number of remaining teeth

From: Number of remaining teeth and health-related quality of life: the Korean National Health and Nutrition Examination Survey 2010–2012

Variables Number of remaining teeth p
0–15 16–20 21–28  
Unweighted n 2169 1068 7186  
Age (years) 69.6 ± 0.31 62.3 ± 0.51 42.1 ± 0.19 < 0.001
Men (yes, %) 43.8 (1.3) 47.4 (1.9) 50.0 (0.4) < 0.001
BMI (kg/m2) 23.5 ± 0.09 24.3 ± 0.13 23.7 ± 0.04 < 0.001
Waist circumference (cm) 83.1 ± 0.28 84.6 ± 0.35 80.7 ± 0.14 < 0.001
Current smoking (yes, %) 21.1 (1.2) 19.8 (1.5) 24.2 (0.5) 0.004
Alcohol intake (yes, %) 37.2 (1.3) 45.9 (1.8) 61.1 (0.6) < 0.001
Regular exercise (yes, %) 14.3 (1.1) 19.1 (1.5) 20.1 (0.5) < 0.001
Income (Q1) (yes, %) 48.6 (1.5) 34.3 (1.9) 11.8 (0.5) < 0.001
Education ≥13 years (yes, %) 19.1 (1.2) 30.2 (1.9) 78.3 (0.6) < 0.001
Urban living (yes, %) 60.7 (2.9) 69.8 (2.9) 82.6 (1.6) < 0.001
Having a spouse (yes, %) 65.6 (1.3) 77.8 (1.7) 81.8 (0.8) < 0.001
Metabolic syndrome (yes, %) 48.9 (1.5) 49.8 (2.0) 22.8 (0.4) < 0.001
EQ-5D 0.850 ± 0.005 0.897 ± 0.006 0.960 ± 0.001 < 0.001
  1. Data presented as mean ± SE or percentage (SE)
  2. The p-values were obtained by one-way analysis of variance or chi-square test
  3. EQ-5D: The EuroQoL five dimension questionnaire (Mobility, Self-care, Usual activities, Pain/discomfort, Anxiety/depression)