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Table 4 Odds ratios and 95 % confidence intervals for dental caries according to tertile of maternal intake of dairy products and calcium during pregnancy in 315 children, OMCHS, Japan

From: Dairy products and calcium intake during pregnancy and dental caries in children

Variable

Tertile of intake

1

2

3

Pfor trend

Total dairy products

 Intake (g/day)1

82.0

171.0

264.6

 

 Range

−72.8 − 122.2

122.3 − 204.7

204.8 − 582.7

 

 Risk

31/105 (29.5 %)

21/105 (20.0 %)

22/105 (21.0 %)

 

 Crude OR (95 % CI)

1.00

0.60 (0.31, 1.12)

0.63 (0.33, 1.18)

0.15

 Adjusted OR (95 % CI)2

1.00

0.58 (0.28, 1.18)

0.51 (0.23, 1.09)

0.08

Milk

 Intake (g/day)1

31.6

123.4

182.7

 

 Range

−82.2 − 80.1

80.2 − 153.8

153.9 − 468.0

 

 Risk

28/105 (26.7 %)

23/105 (21.9 %)

23/105 (21.9 %)

 

 Crude OR (95 % CI)

1.00

0.77 (0.41, 1.45)

0.77 (0.41, 1.45)

0.39

 Adjusted OR (95 % CI)2

1.00

0.74 (0.36, 1.49)

0.64 (0.29, 1.37)

0.23

Yogurt

 Intake (g/day)1

7.9

36.6

90.1

 

 Range

−14.3 − 17.8

17.9 − 62.3

62.4 − 167.5

 

 Risk

29/105 (27.6 %)

25/105 (23.8 %)

20/105 (19.1 %)

 

 Crude OR (95 % CI)

1.00

0.82 (0.44, 1.52)

0.62 (0.32, 1.17)

0.15

 Adjusted OR (95 % CI)2

1.00

0.97 (0.47, 1.99)

0.51 (0.23, 1.10)

0.07

Cheese

 Intake (g/day)1

0.5

3.5

10.1

 

 Range

−7.7 − 2.1

2.2 − 4.8

4.9 − 90.4

 

 Risk

37/105 (35.2 %)

22/105 (21.0 %)

15/105 (14.3 %)

 

 Crude OR (95 % CI)

1.00

0.49 (0.26, 0.90)

0.31 (0.15, 0.59)

0.001

 Adjusted OR (95 % CI)2

1.00

0.56 (0.27, 1.14)

0.37 (0.17, 0.76)

0.01

Calcium

 Intake (mg/day)1

408.1

535.4

690.3

 

 Range

99.5 − 476.6

476.7 − 607.4

607.5 − 1221.6

 

 Risk

31/105(29.5 %)

22/105 (21.0 %)

21/105 (20.0 %)

 

 Crude OR (95 % CI)

1.00

0.63 (0.33, 1.18)

0.60 (0.31, 1.12)

0.12

 Adjusted OR (95 % CI)2

1.00

0.65 (0.31, 1.31)

0.50 (0.23, 1.07)

0.08

  1. 1 Values for intake are medians adjusted for energy intake by the residual method for each tertile.
  2. 2 Adjusted for maternal age at baseline survey, gestation at baseline, family income, maternal and paternal educational levels, maternal smoking during pregnancy, child’s gender, breastfeeding duration, age at introduction to solid foods, age at first tooth eruption, toothbrushing frequency in children at fourth and fifth surveys, use of fluoride, pattern of dental check-ups, household smoking at fifth survey, age at oral examination, and children’s dairy products intake at fifth survey.