Table 2

Mean ln-transformed Pb levels by covariate status (n = 1,669a)

Characteristics and strata

Mean ln Pb (±SD)

P valueb


Race

<0.001

African-American

0.86 (0.70)

Caucasian

0.51 (0.54)

Sex

<0.001

Women

0.52 (0.56)

Men

0.85 (0.68)

BMI

<0.001

>30

0.58 (0.59)

≤30

0.68 (0.65)

Current smoking

0.006

No

0.57 (0.59)

Yes

0.97 (0.67)

Current drinking

<0.001

No

0.56 (0.58)

Yes

0.91 (0.70)

Knee rOA

0.1

No

0.64 (0.64)

Yes

0.63 (0.60)

Knee sxOA

0.1

No

0.65 (0.64)

Yes

0.60 (0.60)


aFor rOA, n = 1,635; for sxOA, n = 1,605; for smoking, n = 1,605; for drinking, n = 1,606; ln Pb, natural log-transformed lead; SD, standard deviation; rOA, radiographic osteoarthritis; sxOA, symptomatic osteoarthritis; bP values represent differences in mean ln Pb values between strata for each characteristic.

Nelson et al. Arthritis Research & Therapy 2011 13:R37   doi:10.1186/ar3270

Open Data