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Table 2 Dietary phytate intake and molar ratios of dietary phytate to calcium, iron, zinc, and (phytate × calcium): zinc based on quintiles of phytate intake level

From: Dietary phytate intake inhibits the bioavailability of iron and calcium in the diets of pregnant women in rural Bangladesh: a cross-sectional study

Quintiles of phytate intakes

Phytate (mg/day)

Phytate: Calcium

Phytate: Iron

Phytate: Zinc

(Phytate × Calcium): Zinc

Mean

(95 % CI)

Mean

(95 % CI)

>0.24 1

Mean

(95 % CI)

>1.0 1

Mean

(95 % CI)

>15 1

Mean

(95 % CI)

>200 1

1st Quintile2,3

409.5a

(399.3-419.1)

0.16a

(0.15-0.17)

0.0

7.9a

(7.6-8.2)

100

7.4a

(7.2-7.6)

0.0

33.4a

(31.0-35.8)

0.0

2nd Quintile2,3

528.9b

(523.4-534.5)

0.23b

(0.22-0.24)

20.9

9.6b

(9.4-9.8)

100

9.3b

(9.1-9.5)

0.0

36.7a

(34.5-38.9)

0.0

3rd Quintile2,3

629.3c

(622.4-636.2)

0.26b

(0.23-0.29)

59.3

12.7c

(12.1-13.3)

100

11.1c

(10.8-11.4)

0.0

53.8b

(50.7-56.9)

0.0

4th Quintile2,3

773.3d

(768.5-778.1)

0.31c

(0.30-0.32)

85.3

16.7d

(16.2-17.2)

100

13.6d

(13.4-13.8)

16.8

63.2c

(59.4-67.0)

0.0

5th Quintile2,3

888.2e

(868.2-908.5)

0.34d

(0.33-0.35)

94.4

17.9e

(17.3-18.5)

100

14.2e

(13.9-14.5)

43.4

82.2d

(78.7-85.5)

0.0

Total (n = 717)

695.1

(680.9-709.3)

0.27

(0.26-0.28)

52.0

12.8

(12.5-13.1)

100

11.2

(11.0-11.4)

12.0

54.8

(53.0-56.6)

0.0

  1. 1Values are given in percentage
  2. 2Analysis of variance (ANOVA) is performed with Games-Howell post hoc analysis to compare the effects of different quintiles categories of phytate intake. Values not sharing the same letters (a-e) denote significant difference among levels (P < 0.05)
  3. 3All the quintiles contain an equal number of sample (n = 143) except the 3rd quintile (n = 145)