Table 8.

Calibration Equations^a for Usual Intakes of Protein and Protein Density in Women, using FFQ-reported Protein and Protein Density, respectively

	Protein		Protein Density
Covariate	Reg. coeff. (SE)	p	Reg. coeff. (SE)	p
Intercept (weighted average of γT0h)	4.441 (0.115)		2.596 (0.118)
λQh: Study 1	0.132 (0.041)		0.419 (0.092)
Study 2	0.039 (0.050)		0.528 (0.094)
Study 3	0.149 (0.040)		0.425 (0.102)
Study 4	0.191 (0.029)		0.426 (0.061)
Study 5	0.162 (0.025)		0.412 (0.076)
Weighted Average	0.152 (0.016)		0.436 (0.037)
Heterogeneity b		0.116		0.886
γT1:
Age: <40y v 50-59y	0.059 (0.034)		0.027 (0.035)
40-49y v 50-59y	0.023 (0.027)		−0.033 (0.029)
60-69y v 50-59y	0.021 (0.030)	<0.001	0.048 (0.032)	0.004
70-79y v 50-59y	−0.048 (0.034)		0.037 (0.036)
>80y v 50-59y	−0.177 (0.043)		−0.051 (0.044)
log BMI	0.371 (0.035)	<0.001	−0.012 (0.036)	0.744
Race: African American v Otherd	−0.116 (0.019)	<0.001	−0.072 (0.020)	<0.001
Education: High school v College	−0.030 (0.018)	0.067	−0.016 (0.018)	0.220
Postgrad v College	0.014 (0.016)		0.018 (0.016)
Heterogeneity c		0.579		0.054

^aSee Equation (7) in text

^bp-value for heterogeneity of adjusted “attenuation coefficient” for FFQ across studies

^cp-value for heterogeneity of regression coefficients for other covariates (γ_T1h) across studies

^dOther includes non-Hispanic whites