Table 1.
Category limits (% kcal) for nutrients used in determining the LCD score INTERMAP/INTERLIPID Study, Japan
| Points | Carbohydrate | Total protein | Total fat | Animal protein | SFA | Veg protein | MUFA + PUFA |
|---|---|---|---|---|---|---|---|
| 0 | 63.7–78.6 | 10.0–13.1 | 9.3–18.5 | 2.6–5.9 | 1.8–4.4 | 4.0–5.6 | 5.4–11.3 |
| 1 | 60.6–63.6 | 13.2–14.0 | 18.6–20.3 | 6.0–6.8 | 4.5–5.0 | 5.7–6.0 | 11.4–12.5 |
| 2 | 58.8–60.5 | 14.1–14.6 | 20.4–22.0 | 6.9–7.4 | 5.1–5.5 | 6.1–6.4 | 12.6–13.5 |
| 3 | 57.3–58.7 | 14.7–15.0 | 22.1–23.3 | 7.5–7.9 | 5.6–5.9 | 6.5–6.7 | 13.6–14.3 |
| 4 | 55.5–57.2 | 15.1–15.6 | 23.4–24.4 | 8.0–8.4 | 6.0–6.3 | 6.8–6.9 | 14.4–15.0 |
| 5 | 53.9–55.4 | 15.7–16.0 | 24.5–25.5 | 8.5–8.9 | 6.4–6.7 | 7.0–7.2 | 15.1–15.6 |
| 6 | 52.3–53.8 | 16.1–16.6 | 25.6–26.5 | 9.0–9.5 | 6.8–7.1 | 7.3–7.4 | 15.7–16.4 |
| 7 | 50.1–52.2 | 16.7–17.1 | 26.6–27.7 | 9.6–10.2 | 7.2–7.5 | 7.5–7.7 | 16.5–17.3 |
| 8 | 47.3–50.0 | 17.2–17.9 | 27.8–29.3 | 10.3–10.9 | 7.6–8.0 | 7.8–8.1 | 17.4–18.3 |
| 9 | 44.2–47.2 | 18.0–19.1 | 29.4–31.6 | 11.0–12.1 | 8.1–9.0 | 8.2–8.6 | 18.4–19.7 |
| 10 | 29.3–44.1 | 19.2–26.2 | 31.7–42.6 | 12.2–18.2 | 9.1–12.9 | 8.7–11.5 | 19.8–26.7 |
LCD score was calculated by modifying the methods of Halton et al. [12]. Data are shown as a percentage of energy. Number of people in each cell is either 99 or 100. We divided the study participants into 11 strata of fat, of protein, and of carbohydrate intake, expressed as a percentage of energy. For fat and protein, participants in the highest stratum received 10 points for that macronutrient, down to participants in the lowest stratum, who received 0 points. For carbohydrate, the order of the strata was reversed. The points for each of the three macronutrients were then summed to create the overall diet score, which ranged from 0 to 30 (usual LCD score). We also created two additional LCD scores by modifying usual LCD score calculation. One was calculated according to the percentage of energy as carbohydrate, the percentage of energy as animal protein, and the percentage of energy as SFA (including plant SFA) (animal-based LCD score), and the other according to the percentage of energy as carbohydrate, the percentage of energy as vegetable protein, and the percentage of energy as MUFA plus PUFA (plant-based LCD score)
LCD low-carbohydrate diet, SFA saturated fatty acids, Veg protein vegetable protein, MUFA mono-unsaturated fatty acids, PUFA poly-unsaturated fatty acids