Table 2.
24 h sodium, potassium, iodine and creatinine excretion: mean, standard deviation (sd) and 95% Confidence Interval (95% CI)
| Group | Sodium (mg/day) | Potassium (mg/day) * | Sodium:Potassium Ratio * | Creatinine (mg/day) | |||
|---|---|---|---|---|---|---|---|
| Mean (sd) | 95% CI | Mean (sd) | 95% CI | Mean (sd) | 95% CI | ||
| Men: | |||||||
| 18–24 years | 3866 (1554) | 3405, 4327 | 2766 (813) | 2525, 3008 | 1.50 (0.67) | 1.30, 1.69 | 1706 (431) |
| 25–44 years | 3795 (1503) | 3372, 7217 | 3058 (957) | 2786, 3329 | 1.29 (0.45) | 1.16, 1.42 | 1703 (482) |
| 45–64 years | 3931 (1520) | 3517, 4347 | 3085 (1050) | 2798, 3371 | 1.38 (0.62) | 1.21, 1.55 | 1719 (401) |
| Total men | 3865 (1515) | 3618, 4113 | 2979 (955) | 2822, 3135 | 1.39 (0.59) | 1.29, 1.48 | 1710 (436) |
| Weighted mean † | 3854 | 3597, 4111 | 3005 | 2837, 3174 | 1.36 | 1.27, 1.46 | N/A |
| Women: | |||||||
| 18–24 years | 3017 (954) | 2724, 3311 | 2193 (632) | 1999, 2387 | 1.43 (0.46) | 1.29, 1.57 | 1174 (232) |
| 25–44 years | 3035 (1241) | 2706, 3365 | 2361 (839) | 2138, 2583 | 1.37 (0.52) | 1.23, 1.51 | 1188 (283) |
| 45–64 years | 2780 (1401) | 2418, 3142 | 2751 (784) | 2549, 2954 | 1.04 (0.44) | 0.93, 1.16 | 1100 (350) |
| Total women | 2934 (1235) | 2738, 3130 | 2463 (798) | 2337, 2590 | 1.26 (0.51) | 1.18, 1.34 | 1151 (299) |
| Weighted mean † | 2926 | 2716, 3137 | 2497 | 2363, 2631 | 1.24 | 1.16, 1.33 | N/A |
| Total men and women | 3386 (1452) | 3221, 3551 | 2712 (913) | 2608, 2816 | 1.32 (0.55) | 1.26, 1.39 | 1422 (465) |
* excluding one outlier with potassium excretion of 10,605 mg/day; † weighted to reflect age and sex structure of the New Zealand population aged 18–64 years in 2012.