Table 2. Classification of serum TC, TG, LDL-C, and LDL-C/HDL-C ratio according to the NCEP ATP III.
| Classification | Reference range |
|---|---|
| Classification of TC (mmol/L) | |
| Q1 (desirable) | <5.2 |
| Q2 (borderline high) | 5.2–6.2 |
| Q3 (high) | ≥6.2 |
| Classification of TG (mmol/L) | |
| Q1 (normal) | <1.7 |
| Q2 (borderline high) | 1.7–2.3 |
| Q3 (high) | 2.3–5.6 |
| Q4 (very high) | ≥5.6 |
| Classification of LDL-C (mmol/L) | |
| Q1 (optimal) | <2.6 |
| Q2 (near or above optimal) | 2.6–3.4 |
| Q3 (borderline high) | 3.4–4.1 |
| Q4 (high) | 4.1–5.0 |
| Q5 (very high) | ≥5.0 |
| Classification of LDL-C/HDL-C | |
| Q1 | <1.5 |
| Q2 | 1.5–2.5 |
| Q3 | 2.5–3.5 |
| Q4 | ≥3.5 |
TC, total cholesterol; TG, triglycerides; LDL-C/HDL-C ratio, the ratio between the levels of low-density lipoproteins and the levels of high-density lipoproteins.