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Table 1 Number of women aged 38 and 50 years who participated in the dental examinations of the Population Study of Women in Gothenburg, and mean and median number of teeth and standard deviation (SD) in the studies in 1968/69, 1980/81, 1992/93 and 2004/05 *

From: Trends in tooth loss in relation to socio-economic status among Swedish women, aged 38 and 50 years: repeated cross-sectional surveys 1968-2004

  

1968/69

1980/81

1992/93

2004/05

Age 38

Participants

356

109

67

207

Participation rate

87.5%

75.2%

72.8%

59.5%

Mean number of teeth

22.2

24.9

28.1

29.0

Median

24.0

27.0

28.0

29.0

 

SD

7.0

5.9

2.2

2.5

Age 50

Participants

390

323

98

293

Participation rate

89.4%

76.4%

77.2%

57.7%

Mean number of teeth

14.6

20.9

23.9

27.3

Median

17.0

23.0

26.0

28.0

 

SD

9.6

7.2

6.2

3.3

  1. *Statistically significant differences (p < 0.05) concerning mean number of remaining teeth between all examinations and age groups except between 1992/93 and 2004/05 for the 38-year-olds.
  2. The analyses of variance method was applied including a post-hoc analysis (LSD).