Table 1 Annual blood lead levels (μg/dL) in NLM children 0–12 years.
Year | N | Min, max (range) | Geometric mean (± 95% CIs) | Median (25th, 75thpercentiles) |
|---|---|---|---|---|
1991 | 215 | 4, 38 (34) | 12.82 (12.15 – 13.54) | 13 (10,17) |
1992 | 270 | 2, 39 (37) | 10.73 (10.17 – 11.33) | 11 (8, 14) |
1993 | 326 | 1, 44 (43) | 10.14 (9.66 – 10.64) | 10 (8, 14) |
1994 | 251 | 3, 34 (31) | 9.80 (9.31 – 10.33) | 10 (7, 13) |
1995 | 243 | 2, 30 (28) | 8.49 (8.01 – 9.00) | 8 (6, 11) |
1996 | 181 | 3, 34 (31) | 8.63 (8.05 – 9.25) | 8 (6, 12) |
1997 | 208 | 2, 21 (19) | 7.18 (6.72 – 7.67) | 7 (5, 10) |
1998 | 213 | 2, 25 (23) | 6.97 (6.53 – 7.45) | 7 (5, 10) |
1999 | 170 | 2, 37 (35) | 7.90 (7.36 – 8.49) | 8 (6, 11) |
2000 | 209 | 2, 24 (22) | 6.72 (6.30 – 7.17) | 6 (5, 9) |
2001 | 287 | 1, 24 (23) | 5.76 (5.39 – 6.16) | 6 (4, 9) |
2002 | 193 | 1, 36 (35) | 6.26 (5.69 – 6.87) | 6 (4, 10) |
Total | 2766 | 1, 44 (43) | 8.31 (8.14 – 8.48) | 8 (6, 12) |