Table 2.
Distribution of nutrient intakes and arsenic measures
| Quartile of nutrient intake
|
P for trenda | ||||
|---|---|---|---|---|---|
| Q1 | Q2 | Q3 | Q4 | ||
| Thiamin | |||||
| N | 2,458 | 2,458 | 2,459 | 2,458 | |
| Median intake (mg/kg/day) | 0.031 | 0.040 | 0.047 | 0.058 | |
| Range | <0.036 | 0.036–0.043 | 0.044–0.051 | >0.051 | |
| Mean daily arsenic intake (μg/kg/day)b | 4.8 (6.4)c | 5.5 (7.1) | 6.3 (7.8) | 7.3 (9.2) | 0.0001 |
| Mean urinary total arsenic (μg/g)d | 241.6 (228.8) | 273.5 (412.4) | 276.6 (265.6) | 301.6 (283.6) | 0.0001 |
| Riboflavin | |||||
| N | 2,458 | 2,458 | 2,459 | 2,458 | |
| Median intake (mg/kg/day) | 0.014 | 0.017 | 0.021 | 0.027 | |
| Range | <0.016 | 0.016–0.019 | 0.020–0.023 | >0.023 | |
| Mean daily arsenic intake (μg/kg/day) | 5.4 (6.8) | 5.6 (6.9) | 6.1 (7.8) | 6.9 (9.2) | 0.0001 |
| Mean urinary total arsenic (μg/g) | 270.0 (262.5) | 274.9 (268. 9) | 269.5 (387.4) | 279.0 (289.5) | 0.69 |
| Niacin | |||||
| N | 2,458 | 2,458 | 2,459 | 2,458 | |
| Median intake (mg/kg/day) | 0.455 | 0.592 | 0.710 | 0.868 | |
| Range | <0.529 | 0.529–0.651 | 0.652–0.774 | >0.774 | |
| Mean daily arsenic intake (μg/kg/day) | 4.9 (6.6) | 5.7 (7.2) | 6.0 (7.5) | 7.3 (9.3) | 0.0001 |
| Mean urinary total arsenic (μg/g) | 241.4 (232.9) | 273.8 (412.5) | 272.9 (257.9) | 305.3 (286.8) | 0.0001 |
| Pantothenic acid | |||||
| N | 2,458 | 2,458 | 2,459 | 2,458 | |
| Median intake (mg/kg/day) | 0.105 | 0.134 | 0.157 | 0.192 | |
| Range | <0.121 | 0.121–0.145 | 0.146–0.171 | >0.171 | |
| Mean daily arsenic intake (μg/kg/day) | 4.9 (6.5) | 5.5 (6.9) | 6.2 (7.8) | 7.3 (9.4) | 0.0001 |
| Mean urinary total arsenic (μg/g) | 246.3 (236.2) | 265.5 (305.8) | 281.9 (377.1) | 299.7 (286.4) | 0.0001 |
| Pyridoxine | |||||
| N | 2,458 | 2,458 | 2,459 | 2,458 | |
| Median intake (mg/kg/day) | 0.052 | 0.067 | 0.079 | 0.097 | |
| Range | <0.059 | 0.059–0.072 | 0.073–0.086 | >0.086 | |
| Mean daily arsenic intake (μg/kg/day) | 4.9 (6.5) | 5.5 (6.9) | 6.1 (7.7) | 7.5 (9.4) | 0.0001 |
| Mean urinary total arsenic (μg/g) | 244.7 (232.4) | 273.2 (412.5) | 271.0 (249.5) | 304.5 (294.8) | 0.0001 |
| Cobalamin | |||||
| N | 2,458 | 2,458 | 2,459 | 2,458 | |
| Median intake (μg/kg/day) | 0.014 | 0.027 | 0.040 | 0.064 | |
| Range | <0.021 | 0.021–0.033 | 0.034–0.048 | >0.048 | |
| Mean daily arsenic intake (μg/kg/day) | 6.7 (8.3) | 5.7 (7.5) | 5.7 (7.2) | 5.8 (8.0) | 0.0001 |
| Mean urinary total arsenic (μg/g) | 299.7 (288.8) | 265.9 (253.1) | 260.7 (231.9) | 267.2 (415.9) | 0.0001 |
| Folate | |||||
| N | 2,458 | 2,458 | 2,459 | 2,458 | |
| Median intake (μg/kg/day) | 3.770 | 5.013 | 6.225 | 8.525 | |
| Range | <4.438 | 4.438–5.580 | 5.581–7.091 | >7.091 | |
| Mean daily arsenic intake (μg/kg/day) | 5.2 (6.5) | 5.4 (7.1) | 6.0 (7.5) | 7.4 (9.4) | 0.0001 |
| Mean urinary total arsenic (μg/g) | 266.5 (252.4) | 272.3 (405.4) | 267.0 (246.2) | 287.5 (293.6) | 0.06 |
a
P for trend calculated from linear regression coefficient based on the ordinal value for each quartile
b
Crude mean values, unadjusted for covariates
c
Mean (SD), all such values
d
Creatinine adjusted