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Air Quality Criteria for Lead Volume II of II - (NEPIS)(EPA) - US ...

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AX4-5<br />

Table AX4-2 (cont’d). Summary <strong>of</strong> Selected Measurements <strong>of</strong> PbB Levels in Humans<br />

Reference, Study<br />

Location, and Period Study Description PbB Measurement Comment<br />

United States (cont’d)<br />

Nash et al. (2003)<br />

U.S.<br />

1988-1994<br />

Pirkle et al. (1994)<br />

U.S.<br />

1976-1980<br />

Symanski and Hertz-<br />

Picciotto (1995)<br />

U.S.<br />

1982-1984<br />

Design: National survey (NHANES <strong>II</strong>I) stratified,<br />

multistage probability cluster design<br />

Subjects: Women(n = 2, 575), age range:<br />

40-59 yrs, in general population<br />

Biomarker measured: PbB<br />

Analysis: GFAAS<br />

Design: National survey (NHANES <strong>II</strong>, <strong>II</strong>I)<br />

stratified, multistage probability cluster design<br />

Subjects: Children and adults ($1 yrs, n = 29, 843)<br />

in general population<br />

Biomarker measured: PbB<br />

Analysis: GFAAS<br />

Design: National survey (HHANES) multistagearea<br />

probability sample<br />

Subjects: Adults, females (n = 3, 137), age range<br />

20-60 yrs, in general Hispanic population<br />

Biomarker measured: PbB<br />

Analysis: GFAAS<br />

Units: µg/dL<br />

Geometric mean (95% CI, n)<br />

Premenopausal: 1.9 (1.7, 2.0, 1, 222)<br />

Surgically menopausal: 2.7 (2.4, 3.2, 139)<br />

Naturally menopausal: 2.9 (2.5, 3.2, 653)<br />

Units: µg/dL<br />

Geometric mean (95% CI)<br />

Age (yr) 1976-1980 1988-1991<br />

1-5: 15.0 (14.2, 15.8) 3.6 (3.3, 4.0)<br />

n: 2, 271 2, 234<br />

6-19: 11.7 (11.2, 12.4) 1.9 (1.7, 2.2)<br />

n: 2,024 2, 963<br />

20-74: 13.1 (12.7, 13.7) 3.0 (2.8, 3.2)<br />

n: 5, 537 6, 922<br />

Males: 15.0 (14.5, 15.5) 3.7 (3.5, 3.9)<br />

n: 4, 895 6,051<br />

Females: 11.1 (10.6, 11.5) 2.1 (2.0, 2.2)<br />

n: 4, 937 6,068<br />

Units: µg/dL<br />

Arithmetic mean (SE, n)<br />

All<br />

Premenopausal: 7.5 (0.07, 1, 984)<br />

Menopausal: 8.9 (0.11, 1, 152)<br />

Mexican-American:<br />

Premenopausal: 7.2 (0.13, 1, 219)<br />

Menopausal: 8.4 (0.20, 624)<br />

Geometric mean PbB concentrations<br />

were significantly lower in<br />

premenopausal women. Increasing<br />

PbB concentrations were significantly<br />

associated with decreased bone mineral<br />

density.<br />

Comparison <strong>of</strong> data from NHANES <strong>II</strong><br />

(1976-1980) and Phase 1 <strong>of</strong> NHANES<br />

<strong>II</strong>I (1988-1991) indicated declining<br />

PbB concentrations in U.S. population.<br />

Mean difference between<br />

premenopausal and postmenopausal<br />

(#4 yrs) was 1.4 µg/dL<br />

(95% CI: 0.20, 2.7).

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