Table 2. Declines in blood lead levels (BLLs) for Chinese population aged 3–59 years during the past two decades.

Sub-population	Year	Geometric mean (95% CI), μg/L	BLLs ≥50 μg/L, %	Rate of decline, %	Disease burden, DALYs (million person-years)
Abbreviation: DALYs=disability-adjusted life years.
Aged 3–5 years
Total				78.4
	2000	78.1 (77.0–79.0)	84.8		16.66
	2017–2018	16.9 (16.1–17.7)	2.7		0.41
Sex
Men				77.7
	2000	80.0 (78.5–81.5)	88.3		8.83
	2017–2018	17.8 (16.4–19.4)	2.6		0.21
Women				78.1
	2000	75.9 (74.3–77.5)	81.2		7.83
	2017–2018	16.6 (15.8–17.5)	2.7		0.20
Aged 6–59 years
Total				44.7
	2009–2010	36.9 (32.1–14.6)	29.8		9.33
	2017–2018	20.4 (20.0–20.8)	4.9		6.46
Sex
Men				43.1
	2009–2010	44.3 (37.8–50.8)	34.6		6.65
	2017–2018	24.2 (23.2–25.3)	7.7		4.95
Women				44.6
	2009–2010	30.3 (24.6–36.0)	19.5		2.70
	2017–2018	16.8 (16.1–17.4)	3.2		1.50
Age (years)
6–11				52.4
	2009– 2010	35.3 (30.0–41.6)	23.7		0.21
	2017–2018	16.8 (16.1–17.6)	1.8		0.12
12–18				54.4
	2009–2010	33.3 (26.1–42.6)	22.5		0.47
	2017–2018	15.2 (14.5–15.9)	2.0		0.25
19–39				40.5
	2009–2010	35.8 (28.4–45.2)	28.9		1.90
	2017–2018	21.3 (20.3–22.4)	5.2		1.23
40–59				37.5
	2009–2010	39.6 (33.1–47.6)	32.5		6.74
	2017–2018	24.8 (23.7–25.9)	9.6		4.71