Table 3

Summary of the 6 meta-analyses

Comparison

Summary effect

95% CI

p-value for heterogeneity test

Model used


Meta analysis 1 [25,43]

Continuous data (difference in mean OHIP total scores)

Total n = 12,965

Reference group: 25-32 teeth

1-8 teeth

3.37

1.37-5.38

<0.001

random effect

9-16 teeth

3.08

1.37-4.80

<0.001

random effect

17-20 teeth

1.89

-0.03-3.82

<0.001

random effect

21-24 teeth

1.05

0.07-2.02

<0.001

random effect


Meta analysis 2 [25,26]

Dichotomized data (Odds ratio for having an OHIP impact)

Total n = 6821

Reference group: complete dentition or ≥ 25 teeth

Incomplete or < 25 teeth

3.45

2.93-4.05

0.975

fixed effect


Meta analysis 3 [5,24,45]

Dichotomized data (Odds ratio for having an OIDP impact)

Total n = 2204

Reference group ≥ 21 teeth

≤ 10 teeth

2.01

1.43-2.83

0.962

fixed effect

>10 and <21 teeth

1.63

1.23-2.17

0.794

fixed effect


Meta analysis 4 [5,45]

Dichotomized data (Odds ratio for having an OIDP impact)

Total n = 1184

Reference groups 9-16 NOPs/4-8 POPs/no UAS

0-8 NOPs

1.99

1.39-2.86

0.279

fixed effect

0-3 POPs

1.66

1.16-2.37

0.808

fixed effect

UAS

1.82

0.68-4.87

0.025

random effect


Meta analysis 5 [38,46]

Continuous data (difference in mean GOHAI total scores)

Total n = 435

Reference group: 20-32 teeth

0-19 teeth

9.78

7.38-12.18

0.157

fixed effect


Meta analysis 6 [31,35]

Continuous data (difference in mean OHQoL-UK total scores)

Total n = 2738

Reference group: 20-32 teeth

0-19 teeth

4.56

3.67-5.44

0.912

fixed effect


Gerritsen et al. Health and Quality of Life Outcomes 2010 8:126   doi:10.1186/1477-7525-8-126

Open Data