TABLE 3.
Multiple regression analyses comparing prediction of dietary sweetener intake from individual and combined isotopic measures12
| Total sugar (g/d) |
Added sugar (g/d) |
SSB (servings/d) |
||||||||
| Model | Isotope ratio, ‰ | β | 95% CI | R2 | β | 95% CI | R2 | β | 95% CI | R2 |
| 1 | δ13C | 0.25* | 0.00, 0.50 | 0.06 | 0.20 | −0.08, 0.48 | 0.03 | 0.21* | 0.00, 0.42 | 0.05 |
| 2 | δ13C | 0.33** | 0.14, 0.51 | 0.48 | 0.28* | 0.04, 0.67 | 0.33 | 0.26** | 0.08, 0.44 | 0.31 |
| δ15N | −0.23*** | −0.29, -0.16 | −0.21*** | −0.29, -0.14 | −0.15*** | −0.21, -0.09 | ||||
1
In these models, δ15N and δ13C were the independent variables and measures of sweetener intake the dependent variables. Significance of association: *** < 0.0001; ** P < 0.01; * P < 0.05. SSB, sugar-sweetened beverage.
2
Slopes have been back-transformed for ease of interpretation and are interpreted as proportional change in sweetener intake for every 1‰ change in isotope ratio.