Table 2.

Sensitivity and Specificity of Apparent Age for the Detection of Poor Health. Poor Health Status Was Assessed by SF-12 Physical and/or Mental Health Scores, Using Four Different Criteria Based on Number of SD Below the Age Group Norm. IQR Denotes Interquartile Range

	Apparent age
	Looking ≥1 year older than actual age		Looking ≥5 years older than actual age		Looking ≥10 years older than actual age
Criterion to define poor health status	Sensitivity, median (IQR)	Specificity, median (IQR)	Sensitivity, median (IQR)	Specificity, median (IQR)	Sensitivity, median (IQR)	Specificity, median (IQR)
≥0.5 SD below norm	48.0 (36.7–56.0)	57.4 (48.7–68.6)	23.4 (16.5–30.7)	83.2 (76.3–89.4)	3.8 (1.3–6.3)	97.9 (95.7–100.0)
≥1.0 SD below norm	47.8 (37.1–55.7)	57.1 (48.2–68.3)	23.9 (17.1–31.5)	82.1 (76.1–89.0)	4.3 (1.4–6.2)	98.2 (96.4–100.0)
≥1.5 SD below norm	52.8 (43.4–60.4)	59.6 (50.7–70.2)	24.8 (20.3–34.0)	82.2 (76.7–87.7)	3.8 (1.9–7.5)	98.6 (95.9–100.0)
≥2.0 SD below norm	55.8 (43.6–62.8)	60.2 (51.5–69.0)	29.1 (18.6–35.5)	81.9 (76.8–88.0)	4.7 (2.3–9.3)	98.7 (96.4–100.0)