Table 2.
Influence of the choice of indexing measure on gender differences in estimated dietary intakes
| Indexed to | CRIC (N = 2778) |
MDRD (N = 1267) |
NHANES (N = 2472) |
||||
|---|---|---|---|---|---|---|---|
| Ratio (95% CI) | P-value | Ratio (95% CI) | P-value | Ratio (95% CI) | P-value | ||
| Protein | Weight | 1.14 (1.10–1.18) | <0.001 | 1.11 (1.03–1.15) | <0.001 | 1.18 (1.12–1.25) | <0.001 |
| BSA | 1.16 (1.12–1.20) | <0.001 | 1.18 (1.13–1.22) | <0.001 | 1.22 (1.16–1.28) | <0.001 | |
| TBW | 0.96 (0.93–1.00) | 0.03 | 0.98 (0.94–1.01) | 0.19 | 1.06 (1.01–1.11) | <0.02 | |
| REE | 1.02 (0.99–1.06) | 0.21 | 1.04 (1.00–1.08) | 0.07 | 1.05 (1.00–1.11) | <0.04 | |
| LBM | 0.89 (0.86–0.92) | <0.001 | 0.96 (0.92–0.99) | 0.02 | 0.97 (0.92–1.02) | 0.18 | |
| Calories | Weight | 1.12 (1.08–1.15) | <0.001 | 1.11 (1.08–1.15) | <0.001 | 1.13 (1.08–1.18) | <0.001 |
| BSA | 1.13 (1.10–1.17) | <0.001 | 1.18 (1.14–1.22) | <0.001 | 1.16 (1.11–1.21) | <0.001 | |
| TBW | 0.94 (0.91–0.97) | <0.001 | 0.98 (0.95–1.01) | 0.18 | 1.01 (0.96–1.05) | 0.64 | |
| REE | 1.00 (0.97–1.03) | 0.89 | 1.04 (1.01–1.07) | 0.02 | 1.00 (0.96–1.05) | 0.83 | |
| LBM | 0.87 (0.84–0.90) | <0.001 | 0.96 (0.93–0.99) | 0.01 | 0.92 (0.88–0.96) | <0.001 | |
| Phosphate | Weight | 1.09 (1.05–1.13) | <0.001 | 1.08 (1.04–1.12) | <0.001 | 1.15 (1.09–1.21) | <0.001 |
| BSA | 1.11 (1.07–1.14) | <0.001 | 1.15 (1.11–1.19) | <0.001 | 1.18 (1.13–1.24) | <0.001 | |
| TBW | 0.92 (0.89–0.95) | <0.001 | 0.95 (0.92–0.99) | 0.01 | 1.03 (0.98–1.08) | 0.23 | |
| REE | 0.98 (0.94–1.01) | 0.16 | 1.01 (0.97–1.05) | 0.53 | 1.02 (0.98–1.07) | 0.33 | |
| LBM | 0.85 (0.82–0.88) | <0.001 | 0.93 (0.90–0.97) | <0.001 | 1.06 (1.01–1.12) | 0.01 | |
| Sodium | Weight | 1.13 (1.09–1.17) | <0.001 | 1.01 (0.96–1.05) | 0.72 | 1.14 (1.08–1.21) | <0.001 |
| BSA | 1.15 (1.12–1.19) | <0.001 | 1.07 (1.02–1.12) | 0.003 | 1.17 (1.12–1.24) | <0.001 | |
| TBW | 0.96 (0.93–0.99) | 0.02 | 0.89 (0.85–0.93) | <0.001 | 1.02 (0.97–1.08) | 0.56 | |
| REE | 1.02 (0.99–1.05) | 0.27 | 0.94 (0.90–0.99) | 0.009 | 1.02 (0.97–1.07) | <0.001 | |
| LBM | 0.89 (0.86–0.92) | <0.001 | 0.87 (0.83–0.91) | <0.001 | 0.93 (0.89–0.98) | 0.10 | |
| Potassium | Weight | 1.05 (1.01–1.09) | 0.009 | 0.99 (0.96–1.03) | 0.68 | 1.10 (1.04–1.15) | <0.001 |
| BSA | 1.07 (1.03–1.10) | <0.001 | 1.05 (1.02–1.09) | 0.004 | 1.13 (1.08–1.18) | <0.001 | |
| TBW | 0.89 (0.86–0.92) | <0.001 | 0.87 (0.84–0.90) | <0.001 | 1.02 (0.94–1.03) | <0.001 | |
| REE | 0.94 (0.91–0.97) | <0.001 | 0.93 (0.90–0.96) | <0.001 | 1.02 (0.93–1.02) | <0.001 | |
| LBM | 0.82 (0.79–0.85) | <0.001 | 0.86 (0.83–0.89) | <0.001 | 0.90 (0.86–0.94) | <0.001 | |
Male:female ratios for geometric means of indexed estimated dietary intakes are shown, adjusted for age and race.
BSA, estimated body surface area; TBW, estimated total body water; REE, estimated resting energy expenditure; LBM, estimated lean body mass.