Table 1.
Estimated median and interquartile range (IQR) of daily intakes of nitrate and nitrite (mg/d) by sex for the FFQ and the 24 h dietary recalls (24HR) in the calibration sub-study: NIH–AARP Diet and Health Study, 1995–1996
| 24HR | ||||||
|---|---|---|---|---|---|---|
| FFQ | First | Second | ||||
| Mean | IQR | Mean | IQR | Mean | IQR | |
| Men | ||||||
| n | 984 | 984 | 953 | |||
| Nitrate (total) | 68·9 | 42·4–106·8 | 65·0 | 30·3–158·0 | 68·4 | 30·6–168·2 |
| Nitrite | ||||||
| Total | 1·3 | 0·9–1·7 | 1·4 | 0·9–2·0 | 1·4 | 0·9–2·0 |
| Plant sources | 0·8 | 0·5–1·1 | 0·9 | 0·6–1·3 | 0·9 | 0·6–1·3 |
| Animal sources | 0·4 | 0·3–0·6 | 0·4 | 0·2–0·8 | 0·4 | 0·2–0·7 |
| Women | ||||||
| n | 958 | 958 | 926 | |||
| Nitrate (total) | 74·1 | 47·0–116·4 | 62·4 | 23·5–144·2 | 74·8 | 29·0–149·1 |
| Nitrite | ||||||
| Total | 1·0 | 0·7–1·3 | 1·0 | 0·7–1·4 | 1·0 | 0·7–1·4 |
| Plant sources | 0·7 | 0·5–0·9 | 0·7 | 0·4–1·0 | 0·7 | 0·4–1·0 |
| Animal sources | 0·3 | 0·2–0·4 | 0·2 | 0·1–0·4 | 0·2 | 0·2–0·4 |
NIH–AARP, National Institutes of Health–AARP.