TABLE 2.
Sodium intake, potassium intake, and Na/K ratio by region in China, 1991–20091
| 1991 | 1993 | 1997 | 2000 | 2004 | 2006 | 2009 | |
| Sodium intake (g/d) | |||||||
| Average | 6.6 ± 3.4 | 6.6 ± 3.4 | 6.2 ± 3.5 | 6.0 ± 3.2 | 5.2 ± 2.7 | 5.0 ± 2.8 | 4.7 ± 2.6 |
| North | 6.8 ± 3.5 | 5.6 ± 2.7 | 5.1 ± 3.3 | 5.1 ± 2.9 | 4.6 ± 2.6 | 4.5 ± 2.5 | 4.3 ± 2.6 |
| Central | 7.0 ± 3.4 | 7.5 ± 3.5 | 6.8 ± 3.7 | 6.9 ± 3.4 | 5.7 ± 3.0 | 5.3 ± 2.8 | 5.3 ± 2.8 |
| South | 6.3 ± 3.3 | 6.1 ± 3.3 | 5.9 ± 3.2 | 5.8 ± 3.1 | 5.0 ± 2.6 | 5.0 ± 2.9 | 4.4 ± 2.4 |
| Potassium intake (g/d) | |||||||
| Average | 1.5 ± 0.5 | 1.6 ± 0.6 | 1.8 ± 0.6 | 1.8 ± 0.7 | 1.8 ± 0.7 | 1.8 ± 0.7 | 1.8 ± 0.7 |
| North | 1.5 ± 0.5 | 1.5 ± 0.6 | 1.8 ± 0.6 | 1.7 ± 0.6 | 1.6 ± 0.6 | 1.9 ± 0.7 | 1.9 ± 0.7 |
| Central | 1.6 ± 0.6 | 1.6 ± 0.6 | 1.8 ± 0.6 | 1.9 ± 0.7 | 1.8 ± 0.7 | 1.8 ± 0.6 | 1.9 ± 0.7 |
| South | 1.5 ± 0.5 | 1.5 ± 0.6 | 1.8 ± 0.7 | 1.8 ± 0.7 | 1.8 ± 0.8 | 1.8 ± 0.7 | 1.8 ± 0.6 |
| Na/K ratio | |||||||
| Average | 4.9 ± 3.4 | 4.7 ± 3.2 | 3.7 ± 2.7 | 3.7 ± 2.2 | 3.2 ± 2.0 | 3.0 ± 1.8 | 2.8 ± 1.8 |
| North | 5.2 ± 4.3 | 4.1 ± 2.4 | 3.0 ± 2.1 | 3.3 ± 1.9 | 3.1 ± 2.2 | 2.6 ± 1.6 | 2.5 ± 1.9 |
| Central | 4.9 ± 3.1 | 5.2 ± 3.3 | 4.0 ± 2.3 | 4.0 ± 2.4 | 3.6 ± 2.3 | 3.1 ± 1.8 | 3.1 ± 1.7 |
| South | 4.7 ± 3.4 | 4.5 ± 3.3 | 3.7 ± 3.1 | 3.6 ± 2.0 | 3.0 ± 1.7 | 3.1 ± 1.9 | 2.7 ± 1.8 |
1
All values are means ± SDs. Sodium intake and the Na/K ratio significantly decreased and potassium intake increased over time (P-trend < 0.001, general linear regression models). In 2009, sodium intake and the Na/K ratio were greater in central China than in the North or in the South (P < 0.001, general linear regression models); potassium intake significantly but slightly differed between regions (P < 0.050, general linear regression models). Na/K ratio, ratio of sodium to potassium.