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Table 4 Daily micronutrient intakes among 12,105 women participating in the Reasons for Geographic and Racial Differences in Stroke study, stratified by race and geographic region

From: Race and region have independent and synergistic effects on dietary intakes in black and white women

Micronutrients (intakes/d)1 Stroke Buckle Stroke Belt Other
(non-stroke buckle or belt)
P value between regions3
  Black
(n = 971)
White
(n = 1,905)
P
value2
Black
(n = 1,600)
White
(n = 2,603)
P
value2
Black
(n = 2,237)
White
(n = 2,789)
P
value2
 
Vitamin A, IU 7352 (6733) 7557 (6447) 0.34 6728 (6497) 7446 (6764) 0.0005 7154 (6517) 8225 (7186) <0.0001 <0.0001
Thiamin, mg 1.1 (0.7) 1.1 (0.6) 0.47 1.1 (0.7) 1.1 (0.6) 0.12 1.1 (0.7) 1.1 (0.6) 0.04 0.03
Riboflavin, mg 1.2 (0.7) 1.3 (0.8) <0.0001 1.2 (0.8) 1.4 (0.8) <0.0001 1.2 (0.8) 1.4 (0.8) <0.0001 0.01
Niacin, mg 14.4 (10.9) 15.7 (9.4) <0.0001 14.8 (10.5) 16.3 (9.9) <0.0001 14.5 (10) 16.4 (9.4) <0.0001 0.17
Folate, μg 283 (200) 293 (178) 0.27 293.6 (203) 307 (181) 0.03 287 (191) 303 (170) <0.0001 0.05
Vitamin B-12, μg 2.6 (2.2) 2.9 (2.2) <0.0001 2.6 (2.3) 3.0 (2.3) <0.0001 2.4 (2.1) 3.0 (2.2) <0.0001 0.01
α-tocopherol, μg 7.4 (5.9) 8.2 (5.4) <0.0001 7.8 (5.7) 8.6 (5.8) <0.0001 7.9 (5.8) 8.6 (5.6) <0.0001 0.0002
β-carotene, μg 2918 (2946) 2778 (2676) 0.18 2706 (2837) 2751 (2822) 0.98 2812 (2877) 2933 (3012) 0.21 0.0009
Vitamin C, mg 101 (96.3) 79.1 (73.0) <0.0001 101 (96) 80.5 (76.0) <0.0001 98.5 (92.7) 93.2 (78.1) 0.0002 <0.0001
Vitamin D, IU 83.0 (91.1) 105 (117) <0.0001 90 (107) 113 (120) <0.0001 86.8 (104) 111 (125) <0.0001 0.07
Calcium, mg 460 (394) 572 (419) <0.0001 506 (394) 606 (433) <0.0001 485 (392) 643 (465) <0.0001 <0.0001
Magnesium, mg 212 (137) 247 (140) <0.0001 218 (138) 255 (147) <0.0001 221 (143) 259 (141) <0.0001 0.001
Potassium, mg 2093 (1362) 2361 (1276) <0.0001 2148 (1346) 2464 (1341) <0.0001 2169 (1356) 2570 (1310) <0.0001 <0.0001
Iron, mg 9.7 (6.9) 10.5 (6.3) 0.0002 10.1 (7.0) 11.0 (6.8) <0.0001 9.7 (6.5) 10.9 (6.3) <0.0001 0.04
Sodium, mg 1779 (1352) 1889 (1112) 0.02 1854 (1356) 1947 (1186) 0.04 1806 (1274) 1980 (1081) <0.0001 0.009
Cholesterol, mg 161 (159) 155 (113) 0.13 167 (150) 156 (124) 0.002 152 (142) 162 (124) 0.005 0.77
  1. 1Values are medians (IQRs). Micronutrients are adjusted for total energy intake using the nutrient residual method
  2. 2 P values compare differences in median intakes between races within region (i.e., black vs. white) using the Wilcoxon two-sample test
  3. 3Global P values compare differences in median intakes across all three regions (i.e., Stroke Buckle vs. Stroke Belt vs. Other) and were calculated using the Kruskal-Wallis test