Figure 14: Incidence Rates of Blood Lead Levels ≥ 10 mcg/dL Among Children Under Age Six Years by Age1; 1998 to 2005 Blood Lead Test Data, New York State Excluding New York City

Figure 14 shows the incidence rate of lead poisoning, expressed as the number of children in each age group newly identified with BLLs ≥ 10 mcg/dL per 1,000 children tested, by age category (0 - < 9 months, 9 months - < 18 months, 18 months - < 36 months, and 36 months - < 72 months) for each year from 1998 to 2005. This analysis was conducted to assess differences in the incidence of lead poisoning among young children of different ages, and how those differences may be changing over time.

Overall, the incidence rate of lead poisoning has declined over time in all age groups defined. These declines are most striking among children aged one year (9 months - < 18 months), two years (18 months - < 36 months), and three years to six years (36 months - < 72 months), while the rate of incidence among children under age one year (0 - < 9 months) has been more stable.

The highest rate of incidence of new cases of BLLs ≥ 10 mcg/dL occurred among children at or around age one year (9 months - < 18 months) in all years since 1999. The rate of incidence is somewhat lower among children aged at or around age two years (18 months - < 36 months), and substantially lower among children aged three to six years (36 months - < 72 months). Although the total number of children under age one identified each year with EBLLs is relatively low (See Figure 13), the percent of children in this age group tested for lead who have elevated results ≥ 10 mcg/dL is close to that of children at or around age one year in most other years.

Year of Test Incidence rates by age when child was screened for lead
0-<9 months 9-<18 months 18-<36 months 36-<72 months
1998 9.3 24.1 40.9 25.4
1999 22.5 29.5 24.2 19.4
2000 25.3 25.6 19.0 11.1
2001 18.6 23.7 16.4 9.1
2002 18.9 24.6 13.4 6.8
2003 18.8 22.1 13.0 6.1
2004 17.9 18.4 12.4 6.2
2005 16.7 17.1 10.2 5.0

Footnotes

  1. Incidence Rate: Total number of children under age six years identified for the first time with confirmed BLLs ≥ 10 mcg/dL divided by the total number of children under age six that had screening tests in that given year and age category, multiplied by 1,000.