Table 3 Results of the simple meta-regressions of continuous moderator variables on the retention success rate estimates.

From: Success rate of proximal tooth-coloured direct restorations in primary teeth at 24 months: a meta-analysis

Moderator variable

k

bj

F

p

QE

R2

Mean age (years)

23

0.229

0.553

0.465

204.315***

0.03

SD of age (years)

11

1.193

1.848

0.207

46.612***

0.27

Sample size

27

−0.009

13.776

0.001

151.956***

0.37

Gender (% male)

16

−0.091

2.984

0.152

156.351***

0.29

Year of the study

27

−0.035

0.499

0.486

235.331***

0.03

  1. k = number of studies. bj = regression coefficient of each predictor. F = Knapp-Hartung’s statistic for testing the significance of the predictor (the degrees of freedom for this statistic are 1 for the numerator and k – 2 for the denominator). p = probability level for the F statistic. QE = statistic for testing the model misspecification. R2 = proportion of variance accounted for by the predictor. ***p < 0.0001.
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