Table 1 Comparison of general data of the elderly in the community

Age(year, \(\overline{\mathrm x}\) ± s)

77.28 ± 4.67

70.362 ± 4.87

66.50 ± 3.63

139.258

< 0.05

Hight(m, \(\overline{\mathrm x}\) ± s)

1.63 ± 0.07

1.63 ± 0.07

1.64 ± 0.04

11.052

< 0.05

Weight(kg, \(\overline{\mathrm x}\) ± s)

59.42 ± 7.92

64.79 ± 14.52

56.57 ± 9.31

0.725

0.485

Sex(Man/Woman)

137/141

32/26

40/4

26.599

< 0.05

Marriage (Yes/No)

274/4

58/0

43/1

-

0.640

Residence(town/rural aera)

232/46

55/3

29/15

15.004

< 0.05

Smoke(number)

220

50

36

1.583

0.453

Drink(number)

98

23

15

0.467

0.792

Standard of culture(number)

6.362

0.042

 Bachelor degree and above

66

9

11

 College for professional training

39

14

20

 Secondary / high school

45

7

0

 Junior high school and below

128

28

13

Inhabiting information(number)

6.640

< 0.05

 Live by oneself

62

21

15

 Cohabiting with others

216

37

29

Family annual income(RMB)

2.835

0.242

 < 10,000

16

4

3

 10000 ~ 30000

80

19

18

 > 30000

182

35

23

Occupation

0.534

< 0.05

 Farmer

102

23

16

 Retiree

103

21

18

 Miscellaneous

73

14

10

Number of chronic diseases(number)

40.082

< 0.05

 0

23

13

14

 1

67

21

18

 ≥ 2

188

24

12

Number of teeth[number,M(P25,P75)]

14(2.3, 20.1)

22(18.0, 23.1)

25(22.0, 26.0)

8.216

< 0.05

Number of dentures[number,M(P25,P75)]

7(3.0, 21.0)

3(1.0, 18.0)

0(0, 2.0)

6.772

< 0.05

Xerostomia(number)

132

15

5

26.349

< 0.05

Subjective chewing difficulty(number)

109

13

3

21.461

< 0.05

OF score(\(\overline{\mathrm x}\) ± s)

7.28 ± 4.67

6.71 ± 2.03

6.16 ± 1.54

6.913

< 0.05

Oral Health Score[M(P25,P75)]

6.0(3.0, 7.0)

4.0(2.0, 6.0)

2.0(1.0, 4.0)

7.748

< 0.05

Nutritional Status(number)

7.358

< 0.05

 Normal

138

34

31

 Dystrophy

140

24

13

Sleep Quality(number)

24.150

< 0.05

 Worse

112

10

6

 General

70

17

7

 Good

96

31

31