Utility of Neck Circumference for Identifying Metabolic Syndrome by Different Definitions in Chinese Subjects over 50 Years Old: A Community-Based Study

Table 4

Comparison of NC and WC for discriminating metabolic syndrome and its components.

	Sensitivity (%)		Specificity (%)		PPV (%)		NPV (%)
Men	NC ≥ 38.5 cm	WC ≥ 90 cm	NC ≥ 38.5 cm	WC ≥ 90 cm	NC ≥ 38.5 cm	WC ≥ 90 cm	NC ≥ 38.5 cm	WC ≥ 90 cm
Hypertension	50.7 (45.3–56.2)	45.4 (40.4–50.9)	64.7 (58.1–70.8)	68.5 (62.1–74.5)	67.6 (61.4–73.3)	67.7 (61.2–73.7)	47.5 (41.9–53.1)	46.4 (41.0–51.8)
Hypertriglyceridemia	56.1 (50.5–61.6)	48.9 (43.3–54.4)	70.6 (64.5–76.2)	72.2 (66.2–77.7)	71.1 (65.1–76.7)	69.5 (63.0–75.4)	55.4 (49.7–60.9)	52.2 (46.8–57.6)
Low HDL-C	69.3 (58.6–78.7)	63.6 (52.7–73.6)	60.1 (55.6–84.5)	64.7 (60.2–68.9)	24.1 (19.0–29.9)	24.8 (19.3–30.9)	91.5 (87.8–94.3)	90.7 (87.1–93.5)
Hyperglycemia	56.1 (48.3–63.6)	52.0 (44.3–59.7)	60.6 (55.6–65.4)	65.7 (60.7–70.3)	38.3 (32.3–44.7)	39.8 (33.4–46.5)	75.9 (70.8–80.6)	75.8 (70.9–80.2)
MS (ATP III)	72.3 (65.3–78.5)	76.4 (69.8–82.3)	69.6 (64.7–74.2)	78.8 (74.4–82.8)	54.5 (48.2–60.8)	64.6 (58.0–70.8)	83.2 (78.6–87.2)	86.9 (82.8–90.3)
Women	NC ≥ 33.4 cm	WC ≥ 80 cm	NC ≥ 33.4 cm	WC ≥ 80 cm	NC ≥ 33.4 cm	WC ≥ 80 cm	NC ≥ 33.4 cm	WC ≥ 80 cm
Hypertension	68.1 (64.3–71.8)	80.7 (77.4–83.8)	51.8 (45.8–57.7)	36.0 (30.4–41.9)	75.3 (71.5–78.8)	73.2 (69.7–76.5)	42.9 (37.6–48.3)	46.4 (39.7–53.2)
Hypertriglyceridemia	70.7 (66.6–74.6)	83.3 (79.9–86.4)	50.3 (45.1–55.4)	35.3 (30.5–40.4)	66.0 (61.9–69.9)	63.8 (60.0–67.4)	55.7 (50.2–61.0)	60.8 (54.0–67.3)
Low HDL-C	75.2 (69.5–80.3)	86.6 (81.9–90.5)	43.6 (39.7–47.5)	29.1 (25.6–32.8)	35.2 (31.3–39.4)	33.3 (29.8–37.0)	81.2 (76.6–85.1)	84.2 (78.7–88.8)
Hyperglycemia	77.1 (72.2–81.6)	87.5 (83.4–90.9)	46.9 (42.7–51.0)	31.4 (27.6–35.4)	45.3 (41.1–49.5)	42.1 (38.3–45.9)	78.3 (73.5–82.5)	81.5 (75.8–86.4)
MS (ATP III)	79.0 (75.1–82.4)	94.4 (92.1–96.3)	59.8 (54.8–64.6)	48.5 (43.5–53.5)	71.2 (67.2–74.9)	69.8 (66.2–73.2)	69.3 (64.1–74.1)	87.4 (82.3–91.5)

NC: neck circumference; WC: waist circumference; PPV: positive predictive value; NPV: negative predictive value; HDL-C: high-density lipoprotein cholesterol; ATP III: Adult Treatment Panel III.