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Table 4 Univariate and multiple logistic regression analysis for the high DF-root value

From: Status of dental caries and associated factors in Tibetan adults: findings from the fourth China National Oral Health Survey

Factors

Categories

DF-root value

Univariate logistic regression

Multiple logistic regression

Cases

(≥1), n

Control

(=0), n

Unadjusted OR (95%CI)

P

Adjusted OR a (95%CI)

P

Gender

Male

89

135

1

0.68

1

0.71

Female

84

138

0.92 (0.63–1.35)

0.92 (0.60–1.41)

Residence

Urban

91

131

1

0.34

1

0.04

Rural

82

142

0.83 (0.57–1.22)

0.59 (0.35–0.98)

Age

35–44

41

108

1

–

1

–

55–64

60

91

1.74 (1.07–2.82)

0.69

1.26 (0.74–2.15)

0.92

65–74

72

74

2.56 (1.58–4.16)

0.001

1.52 (0.84–2.78)

0.23

Level of education

Low (Illiteracy and primary school)

150

211

1

–

1

–

Medium (Middle school)

13

22

0.83 (0.41–1.70)

0.39

1.23 (0.56–2.71)

0.36

High (College degree and above)

10

40

0.35 (0.17–0.73)

0.02

0.73 (0.30–1.78)

0.34

Level of income

Low (≤ 20,000 RMB)

114

142

1

–

1

–

Medium (20,000- < 40,000 RMB)

26

35

0.93 (0.53–1.63)

0.22

1.08 (0.58–2.01)

0.20

High (≥ 40,000 RMB)

33

96

0.43 (0.27–0.68)

0.001

0.52(0.31–0.88)

0.01

Frequency of tooth brushing

Low (< once/day)

76

78

1

0.001

1

0.009

High (≥ once/day)

97

195

0.51 (0.34–0.76)

0.51 (0.31–0.84)

Dental visit experience

Yes

93

124

1

0.09

1

0.11

No

80

149

0.72 (0.49–1.05)

0.69(0.44–1.09)

Knowledge and attitude of oral health

Positive

74

149

1

0.02

1

0.12

Negative

99

124

1.61 (1.10–2.36)

1.46 (0.91–2.36)

Frequency of dessert

Scare

101

157

1

–

1

–

< once/day

59

88

1.04 (0.69–1.58)

0.40

1.12 (0.67–1.86)

0.78

≥ once/day

13

28

0.72 (0.36–1.46)

0.32

1.06 (0.48–2.35)

0.99

Frequency of drink with sugar

Scare

126

189

1

–

1

–

< once/day

40

68

0.88 (0.56–1.39)

0.78

0.82(0.48–.42)

1.00

≥ once/day

7

16

0.66 (0.26–1.64)

0.44

0.68 (0.250–1.84)

0.56

Loss of attachment

No

14

78

1

4.54 (2.48–8.33)

< 0.001

1

< 0.001

Yes

159

195

3.94 (2.10–7.39)

  1. aAdjusted for other factors