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Table 2 Deciduous caries prevalence of the surveyed children categorized by different factors of the questionnaire (n = 9804)

From: Deciduous dental caries status and associated risk factors among preschool children in Xuhui District of Shanghai, China

Variables

Categories

No. of surveyed (No. of cases with dental caries)

Caries prevalence (%)

P-value (statistics1)

Guardians

Parents

9002 (4196)

46.61

0.076 (3.149a)

Grandparents

802 (400)

49.88

Education level of guardians

Illiteracy

26 (19)

73.08

< 0.001** (13.436)

Primary school

52 (36)

69.23

Middle school

497 (310)

62.37

High school

704 (403)

57.24

Technical secondary school

472 (270)

57.20

Junior college

2065 (1033)

50.02

Undergraduate

4532 (1958)

43.20

Graduate and above

1456 (567)

38.94

Feeding patterns

Exclusive breastfeeding

3162 (1570)

49.65

< 0.001** (20.015a)

Predominant breastfeeding

2057 (934)

45.41

Exclusive artificial feeding

1133 (550)

48.54

Predominant artificial feeding

919 (402)

43.74

Combination feeding

2533 (1140)

45.01

Eating desserts and candies (times per week)

< 1

503 (216)

42.94

< 0.001** (−4.432)

1–2

908 (401)

44.16

3–4

1272 (595)

46.78

5–6

3217 (1427)

44.36

7–8

2824 (1403)

49.68

> 8

1080 (554)

51.30

Drinking sweetened beverages (times per week)

< 1

3544 (1465)

41.34

< 0.001** (−8.810)

1–2

2548 (1219)

47.84

3–4

1806 (890)

49.28

5–6

1259 (672)

53.38

7–8

506 (265)

52.37

> 8

141 (85)

60.28

Eating sweets before sleep (days per week)

Rarely/never (< 1)

4079 (1563)

38.32

< 0.001** (13.962)

Sometimes (1–3)

5132 (2696)

52.53

Often (> = 4)

593 (337)

56.83

The age of starting tooth- brushing (years old)

< 1

540 (183)

33.89

< 0.001** (−8.635)

1

1424 (598)

41.99

2

3304 (1503)

45.49

3

2915 (1483)

50.87

> = 4

1621 (829)

51.14

Toothbrush (times per day)

< 1

5096 (2414)

47.37

0.063 (1.860)

1

3562 (1683)

47.25

> = 2

1146 (499)

43.54

Helping children brush teeth (days per week)

Rarely/never (< 1)

1984 (984)

49.60

0.001** (−3.332)

Sometimes (1–3)

4480 (2115)

47.21

Often (4–6)

276 (124)

44.93

Everyday (7)

3064 (1373)

44.81

Parental perception about children’s oral health (score)

Poor (1–2)

800 (701)

87.63

< 0.001** (36.423)

Fair (3)

2759 (1794)

65.02

Good (4–5)

6245 (2101)

33.64

Score of guardians’ oral health knowledge

0–4

385 (182)

47.27

< 0.001** (3.516)

5–9

1506 (791)

52.52

10–14

7913 (3623)

45.79

Total

9804 (4596)

46.88

  1. **P < 0.01
  2. 1a: Pearson Chi-square test (the statistics is χ2-value); the others were Cochran-Armitage test for trend (the statistics is Z-value)