Table 4 Results of the weighted ANOVAs of qualitative moderator variables on the retention success rates.

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

   

95% CI

 

Moderator variable

k

p+

LL

LU

ANOVA results

-Material:

    

F(4,22) = 4.22, p = 0.011

R2 = 0.36

QW(22)=148.92, p < 0.001

Resin-based material plus total-etching adhesion

7

0.949

0.868

0.981

Resin-based material plus self-etching adhesion

8

0.824

0.672

0.914

Resin-modified Glass-ionomer cement (RMGIC)

5

0.956

0.865

0.986

High-viscosity Glass-ionomer Cement (HVGIC)

6

0.671

0.447

0.838

Open Sandwich Restoration

1

0.950

0.639

0.995

-Use of coat:

    

F(1,10) = 0.16, p = 0.699

R2 = 0.0

QW(10)=149.51, p < 0.001

No

9

0.854

0.609

0.956

Yes

3

0.904

0.474

0.989

-Use of cavity conditioner:

    

F(1,10) = 2.27, p = 0.163

R2 = 0.03

QW(10)=135.14, p < 0.001

No

2

0.973

0.695

0.998

Yes

10

0.826

0.605

0.937

-Use of rubber dam isolation:

    

F(1,22) = 2.25, p = 0.148

R2 = 0.16

QW(22)=206.44, p < 0.001

No

14

0.847

0.726

0.920

Si

10

0.931

0.834

0.973

-Cavity form:

    

F(1,25) = 24.76, p < 0.001

R2 = 0.46

QW(25)=138.88, p < 0.001

Atraumatic restorative treatment (ART)

8

0.649

0.488

0.783

Conventional cavity design

19

0.936

0.895

0.961

- Dentist experience:

    

F(1,25) = 4.34, p = 0.048

R2 = 0.07

QW(25)=232.264, p < 0.001

Experienced

25

0.895

0.828

0.938

Non-experienced

2

0.554

0.168

0.885

−Type of study:

Noncontrolled trial

3

0.892

0.614

0.977

F(2,24) = 0.25, p = 0.783

R2 = 0.09

QW(24)=197.82, p < 0.001

Nonrandomized controlled trial

9

0.899

0.768

0.961

Randomized controlled trial

15

0.854

0.718

0.931

-Random assignment:

    

F(1,25) = 0.55, p = 0.465

R2 = 0.16

QW(25)=197.88, p < 0.001

No/Incorrect

12

0.897

0.792

0.952

Correct

15

0.851

0.716

0.929

-Triple-blind

    

F(1,25) = 5.48, p = 0.028

R2 = 0.32

QW(25)=176.25, p < 0.001

No

11

0.934

0.859

0.971

Yes

16

0.805

0.674

0.892

-Reporting bias:

    

F(1,25) = 0.82, p = 0.374

R2 = 0.08

QW(25)=236.27, p < 0.001

No

24

0.867

0.779

0.924

Yes

3

0.935

0.726

0.987

-Financial source:

    

F(1,15) = 1.07, p = 0.317

R2 = 0.0

QW(15)=157.82, p < 0.001

Private or mixed

5

0.807

0.482

0.949

Public

12

0.909

0.785

0.965

  1. k = number of studies. p+ = mean success rate. LL and LU = lower and upper 95% confidence limits for p+. F = Knapp-Hartung’s statistic for testing the significance of the moderator variable. QW = statistic for testing the model misspecification. R2 = proportion of variance accounted for by the moderator.
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