TABLE 4.

Blood Lead Levels at 1-Year Follow-Up of Children With Elevated Baseline Levels by Level of Exposure: Fujian Province, China, 2008

	Exposure
BLL, μg/dL	Low (n = 44), Mean (SD) or %	Medium (n = 99), Mean (SD) or %	High (n = 32), Mean (SD) or %	Total (n = 175), Mean (SD) or %
Baseline	18.32 (3.75)	18.70 (3.25)	20.53 (4.30)	18.94 (3.60)
1-year follow-up	12.38 (3.30)	14.12 (4.69)	15.97 (4.20)	14.02 (4.61)
Follow-up − baseline	−5.94* (3.44)	−4.59* (3.48)	−4.55* (3.33)	−4.92* (3.44)
(Follow-up − baseline)/baseline	−32.4	−24.4	−22.2	−26.1

Note. BLL = blood lead level.

^*P < .001, paired t test.