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Table 1 Characteristics of participants in study samples 1 and 2

From: The validity of self-reported number of teeth and edentulousness among Norwegian older adults, the HUNT Study

  Study sample 1 (n = 586) Study sample 2 (n = 518)
Sex, n (%)
 Female 294 (50.2) 357 (68.9)
 Male 292 (49.8) 161 (31.1)
Age, mean (SD) 75.6 (4.6) 86.4 (6.9)
Age, n (%)
 70–74 years 320 (54.6) 34 (6.6)
 75–79 years 157 (26.8) 69 (13.3)
 80 + years 109 (18.6) 415 (80.1)
Education, n (%)
 Primary/secondary school (≤ 12 years) 378 (64.5) 335 (64.7)
 College/university (> 12 years) 205 (35.0) 34 (6.6)
 Unknowna 3 (0.5) 149 (28.8)
Smoking status, n (%)
 Never smokers 210 (35.8) 170 (32.8)
 Ever smokers 370 (63.1) 217 (41.9)
 Unknowna 6 (1.0) 131 (25.3)
Cognitive function, n (%)
 No cognitive impairment 339 (57.8) 67 (12.9)
 Mild cognitive impairment 154 (26.3) 141 (27.2)
 Dementia 32 (5.5) 288 (55.6)
 Unknowna 61 (10.4) 22 (4.2)
Self-perceived general health, n (%)
 Good 396 (67.6) 96 (18.5)
 Poor 184 (31.4) 285 (55.0)
 Unknowna 6 (1.0) 137 (26.4)
Self-perceived oral health, n (%)
 Good 473 (80.7) 311 (60.0)
 Poor 84 (14.3) 138 (26.6)
 Unknowna 29 (4.9) 69 (13.3)
Clinical number of teeth, mean (SD) 21.0 (7.2)
Clinical number of teeth, n (%)
 ≤ 19 teeth 162 (27.6)
 ≥ 20 teeth 424 (72.4)
Self-reported number of teeth, mean (SD) 20.8 (7.9) 8.8 (9.8)
Edentulousness, n (%)
 Clinically recorded edentulous 22 (3.8) 217 (41.9)
 Self-reported edentulous 24 (4.1) 220 (42.5)
Fixed prosthodonticsb, mean (SD) 5.4 (5.1)  
Fixed prosthodonticsb, n (%)
 None 113 (19.3)
 1–2 teeth 98 (16.7)
 3–4 teeth 93 (15.9)
 5 or more teeth 282 (48.1)
  1. SD standard deviation
  2. aMissing information is coded as unknown
  3. bTeeth restored or replaced by fixed prosthodontics (i.e., crowns, implants, bridge abutments and pontics)