Table 2 Assessment of variables of oral function among age groups

Remaining teeth

27.60 ± 1.80

26.40 ± 2.60

26.00 ± 4.16

< 0.0001 *

0.0012 *

< 0.0001 *

0.0984

Posterior teeth

15.68 ± 1.78

14.92 ± 1.80

14.38 ± 2.08

< 0.0001 *

0.0054 *

< 0.0001 *

0.0522

Eichner index (A: B) †

180:4

95:6

88:12

0.0051 *

MP

188.14 ± 65.93

186.07 ± 60.86

183.09 ± 54.04

0.2750

.

.

.

TP †††

36.29 ± 10.40

30.41 ± 8.45

25.39 ± 8.48

< 0.0001 *

< 0.0001 *

< 0.0001 *

0.0064 *

BF

855.83 ± 434.55

662.73 ± 358.16

671.58 ± 291.25

< 0.0001 *

0.0039 *

< 0.0001 *

1.0000

Occluding area

26.26 ± 14.05

20.74 ± 10.44

20.36 ± 8.47

0.0001 *

0.0045 *

0.0006 *

1.0000

HG

28.83 ± 9.49

25.78 ± 9.12

21.89 ± 7.89

< 0.0001 *

0.0363 *

< 0.0001 *

0.0009 *

ODK

/pa/

5.86 ± 0.83

5.17 ± 0.80

4.74 ± 0.83

< 0.0001 *

< 0.0001 *

< 0.0001 *

0.0042 *

/ta/

5.95 ± 0.96

5.17 ± 0.80

4.57 ± 0.74

< 0.0001 *

< 0.0001 *

< 0.0001 *

< 0.0001 *

/ka/

5.65 ± 0.81

4.93 ± 0.87

4.49 ± 0.84

< 0.0001 *

< 0.0001 *

< 0.0001 *

0.0030 *

Oral dryness

28.32 ± 1.66

28.59 ± 2.19

27.78 ± 3.88

0.0083 *

0.0.1887

0.0075 *

0.1.0000

FIA

67.24 ± 10.37

65.70 ± 9.18

62.71 ± 12.81

0.0217 *

0.0450 *

0.1062

1.0000

OHIP-14

5.31 ± 7.10

4.88 ± 6.93

4.76 ± 6.63

0.5258

.

.

.

KMMSE

27.87 ± 1.91

27.04 ± 3.09

25.58 ± 5.10

0.0914

.

.

.

PHQ-9

2.01 ± 2.97

2.87 ± 3.45

4.43 ± 5.50

0.0039 *

0.2865

0.0039 *

0.3258