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Table 3 Results of Welch t test comparing studies' CMT results (%) according to various minimum ages

From: Meta-analysis and systematic review of factors biasing the observed prevalence of congenitally missing teeth in permanent dentition excluding third molars

Cutoff age (year)

<Cutoff

≥Cutoff

 

N

Mean (%)

N

Mean (%)

Difference

P value

6

13

5.85

64

6.27

0.42

0.704

7

28

6.41

49

6.08

-0.33

0.687

8

37

6.39

40

6.02

-0.36

0.62

9

42

6.42

35

5.93

-0.49

0.49

10

50

6.77

27

5.14

-1.64

0.018

11

54

6.68

23

5.06

-1.63

0.028

12

57

6.64

20

4.94

-1.70

0.033

13

64

6.52

13

4.60

-1.92

0.074

14

66

6.39

11

5.05

-1.34

0.239

16

71

6.34

6

4.50

-1.84

0.011

  1. N number of studies.