4. Summary of estimates, all data points ‐ CHINA.
| Data point 1 | Data point 2 | Data point 3 | Data point 4 | Data point 5 | Data point 6* | Data point 7* | |
| Data source | 1991 China Health and Nutrition Survey | 1993 China Health and Nutrition Survey | 1997 China Health and Nutrition Survey | 2000 China Health and Nutrition Survey | 2004 China Health and Nutrition Survey | 2006 China Health and Nutrition Survey | 2009 China Health and Nutrition Survey |
| Overall estimate – as originally reported | Mean sodium intake: 6.6 grams/d, SD = 3.4 (95% CI 6.52 to 6.68) | Mean sodium intake: 6.6 grams/d, SD = 3.4 (95% CI 6.52 to 6.68) | Mean sodium intake: 6.2 grams/d, SD = 3.5 (95% CI 6.12 to 6.28) | Mean sodium intake: 6.0 grams/d, SD = 3.2 (95% CI 5.93 to 6.07) | Mean sodium intake: 5.2 grams/d, SD = 2.7 (95% CI 5.14 to 5.26) | Mean sodium intake: 5.0 grams/d, SD = 2.8 (95% CI 4.93 to 5.07) | Mean sodium intake: 4.7 grams/d, SD = 2.6 (95% CI 4.64 to 4.76) |
| Overall estimate – revised for comparability | Mean salt intake: 16.76 grams/d (95% CI 16.56 to 16.97) | Mean salt intake: 16.76 grams/d (95% CI 16.56 to 16.97) | Mean salt intake: 15.77 grams/d (95% CI 15.54 to 15.95) | Mean salt intake: 15.24 grams/d (95% CI 15.06 to 15.42) | Mean salt intake: 13.21 grams/d (95% CI 13.06 to 13.36) | Mean salt intake: 12.70 grams/d (95% CI 12.52 to 12.88) | Mean salt intake: 11.94 grams/d (95% CI 11.79 to 12.09) |
| Measurement tool | 3 consecutive 24‐hour dietary recalls | 3 consecutive 24‐hour dietary recalls | 3 consecutive 24‐hour dietary recalls | 3 consecutive 24‐hour dietary recalls | 3 consecutive 24‐hour dietary recalls | 3 consecutive 24‐hour dietary recalls | 3 consecutive 24‐hour dietary recalls |
| Sample size | n = 7337 | n = 6958 | n = 7241 | n = 7940 | n = 7250 | n = 6826 | n = 6932 |
| Progress indicators available | Gender, place of residence, education, income | Gender, place of residence, education, income | Gender, place of residence, education, income | Gender, place of residence, education, income | Gender, place of residence, education, income | Gender, place of residence, education, income | Gender, place of residence, education, income |
underlined text = computed by review authors
*Data points on which primary calculation of mean difference (pre‐intervention vs post‐intervention) is based (see Data and analyses ‐ "overall")
Note: Based on all data points, “sodium intake significantly decreased over time (P‐trend, 0.001, general linear regression models)”