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Table 3 Correlation of clinical and self-reported number of teeth in study sample 1 (n = 586)

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

 

Clinical number of teeth

Self-reported number of teeth

Spearmana

95% CI

Pearsona

95% CI

Median (IQR)

Mean (SD)

Median (IQR)

Mean (SD)

Total

23 (19–26)

21.0 (7.2)

23 (18–26)

20.8 (7.9)

0.86

0.84–0.88

0.91

0.90–0.92

Sex

        

 Female

23 (19–26)

21.1 (7.2)

23 (18–26)

20.7 (7.8)

0.88

0.85–0.91

0.93

0.91–0.94

 Male

23 (18.5–26)

20.9 (7.2)

23 (18–26)

20.8 (8.0)

0.84

0.81–0.88

0.90

0.87–0.92

Age

        

 70–74 years

25 (21–27)

22.7 (6.0)

24 (20–27)

22.6 (6.7)

0.83

0.80–0.87

0.90

0.87–0.92

 75 + years

21 (16–25)

18.9 (8.0)

21 (12–25)

18.5 (8.7)

0.87

0.84–0.90

0.91

0.89–0.93

Educationb

        

 Primary/secondary school

22 (17–25)

19.8 (7.7)

22 (16–26)

19.6 (8.2)

0.88

0.85–0.90

0.93

0.91–0.94

 College/university

25 (21–27)

23.3 (5.5)

25 (20–27)

22.9 (6.8)

0.81

0.75–0.85

0.85

0.81–0.84

Smoking statusb

        

 Never smokers

24 (21–26)

22.6 (5.6)

24 (20–26)

22.6 (6.3)

0.81

0.76–0.85

0.87

0.84–0.90

 Ever smokers

23 (17–26)

20.2 (7.7)

22 (15–26)

19.9 (8.5)

0.88

0.85–0.90

0.92

0.90–0.93

Cognitive functionb

        

 No cognitive impairment

24 (20–26)

21.7 (6.8)

24 (19–27)

21.2 (7.5)

0.87

0.85–0.90

0.91

0.89–0.93

 Mild cognitive impairment

23 (19–26)

20.7 (7.2)

23 (18–26)

20.8 (8.2)

0.84

0.78–0.88

0.90

0.86–0.93

 Dementia

21 (13.5–23)

17.6 (8.0)

20 (10.5–23.5)

17.3 (8.6)

0.74

0.52–0.87

0.85

0.71–0.92

Self-perceived general healthb

        

 Good

24 (20–26)

21.7 (6.7)

24 (19–27)

21.5 (7.5)

0.86

0.83–0.88

0.91

0.89–0.92

 Poor

23 (17–25)

19.5 (8.1)

21 (14–26)

19.1 (8.6)

0.87

0.83–0.90

0.92

0.89–0.94

Self-perceived oral healthb

        

 Good

24 (20–26)

22.3 (6.2)

24 (20–27)

22.2 (7.0)

0.83

0.80–0.86

0.88

0.86–0.90

 Poor

18 (8–22.5)

15.5 (7.9)

15 (8–21)

14.4 (8.0)

0.91

0.86–0.94

0.92

0.88–0.95

Clinical number of teeth

        

 ≤ 19 teeth

14 (6–17)

11.4 (6.7)

11 (5–18)

11.5 (7.7)

0.90

0.86–0.92

0.90

0.86–0.92

 ≥ 20 teeth

25 (23–27)

24.6 (2.5)

25 (22–27)

24.3 (4.3)

0.76

0.72–0.80

0.67

0.61–0.72

Fixed prosthodonticsc

        

 None

21 (4–26)

15.8 (10.9)

20 (4–26)

16.1 (11.2)

0.98

0.97–0.99

0.99

0.99–1.00

 1–2 teeth

25 (21–27)

23.1 (6.1)

26 (21–27)

23.2 (6.4)

0.91

0.87–0.94

0.95

0.93–0.97

 3–4 teeth

24 (21–26)

22.9 (4.8)

24 (20–27)

23.2 (5.3)

0.83

0.75–0.88

0.87

0.80–0.91

 5 or more teeth

23 (19–25)

21.7 (5.1)

22 (18–26)

21.0 (6.6)

0.75

0.69–0.80

0.77

0.72–0.82

  1. CI confidence interval, IQR: interquartile range, SD standard deviation
  2. aAll p values < 0.001
  3. bMissing information for education (n = 3), smoking status (n = 6), cognitive function (n = 61), self-perceived oral health (n = 29), self-perceived general health (n = 6)
  4. cTeeth restored or replaced by fixed prosthodontics (i.e., crowns, implants, bridge abutments and pontics)