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

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AX6-159<br />

Table AX6-5.2. Effects <strong>of</strong> <strong>Lead</strong> on Cardiovascular Morbidity<br />

Reference, Study<br />

Location, and<br />

Period Study Description Pb Measurement Findings, Interpretation<br />

United States<br />

Cheng et al.<br />

(1998)<br />

U.S.-Boston,<br />

Normative Aging<br />

Study (VA)<br />

1991-1995<br />

Gump et al. (2005)<br />

U.S.-Oswego, NY<br />

Dates <strong>of</strong> study not<br />

given<br />

775 males (97% white), mean age (SD,<br />

range) 67.8 yrs (7.3, 48-93).<br />

Multiple linear regression models <strong>of</strong><br />

heart rate-corrected QT and QRS<br />

electrocardiogram intervals were<br />

adjusted by stepwise entry <strong>of</strong><br />

covariates, retaining only those that<br />

remained significant at p < 0.10.<br />

Linear blood Pb, tibia, and patella bone<br />

Pb were apparently (not described in<br />

text) entered separately. Logistic<br />

regression models <strong>for</strong> Minnesota ECG<br />

Coding Center diagnoses <strong>of</strong><br />

intraventricular conduction deficit<br />

(IVCD), atrioventricular conduction<br />

deficit (AVCD), and arrhythmia were<br />

adjusted by covariates the same way.<br />

Only analyses stratified by age (

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