Table 5.
Validity coefficients for method of triads.
| Fatty Acids Group | ra | rb | rc | z diff (p-Value) | ||
|---|---|---|---|---|---|---|
| ρ (DR vs. FFQ) | ρ (FFQ-TG) | ρ (DR-TG) | ra—rb | ra—rc | rb—rc | |
| SFA (% fat) | 0.49 | 0.52 | 0.46 | −0.03 (0.800) | 0.03 (0.772) | 0.06 (0.587) |
| MUFA (% fat) | 0.18 | 0.98 | 0.12 | −0.80 (<0.001) | 0.06 (0.654) | 0.80 (<0.001) |
| PUFA (% fat) | 0.37 | 0.48 | 0.56 | −0.11 (0.331) | −0.19 (0.066) | −0.08 (0.384) |
| TFA (% fat) | 0.93 | 0.38 | 0.10 | 0.55 (<0.001) | 0.83 (<0.001) | 0.28 (0.035) |
| P/S ratio | 0.37 | 0.53 | 0.51 | −0.16 (0.136) | −0.14 (0.199) | 0.02 (0.838) |
| ω-3 FAs (% fat) | 0.67 | 0.12 | 0.29 | 0.55 (<0.001) | 0.38 (<0.001) | −0.17 (0.207) |
| ω-6 FAs (% fat) | 0.44 | 0.48 | 0.53 | −0.04 (0.715) | −0.09 (0.393) | −0.05 (0.625) |
Note: Fisher r to z transformation with ra = correlation coefficient for validity between DR and FFQ; rb = correlation coefficient for validity between FFQ and TG; rc = correlation coefficient for validity between DR and TG; categorization as per ≥ 0.8 = high, 0.4–0.79 = moderate, 0.2–0.39 = low, <0.2 very low; and z diff for p > 0.05 indicates agreement. Abbreviations: DR = 3-day dietary records; en = energy; g/day = gram per day; FFQ = food frequency questionnaires; MUFA = monounsaturated fatty acid; ω-3 FAs = omega-3 fatty acids; ω-6 FAs = omega-6 fatty acids; PUFA = polyunsaturated fatty acid; P/S = polyunsaturated fatty acid/saturated fatty acid; SFA = saturated fatty acid; TFA = trans fatty acid; TG = plasma triglyceride fatty acid biomarker.