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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)