Table 7.

Estimates of attenuation factors and correlations with truth for the time-varying and fixed-intake models without covariates (standard errors in parentheses): protein density intake among women

		Time-varying intake model		Fixed-intake model
Instrument	Study	Attenuation Factor	Correlation with Truth	Attenuation Factor	Correlation with Truth
FFQa	1	0.370 (0.094)	0.396 (0.097)	0.330 (0.082)	0.362 (0.085)
	2	0.509 (0.095)	0.535 (0.098)	0.398 (0.081)	0.428 (0.079)
	3	0.454 (0.100)	0.408 (0.086)	0.470 (0.098)	0.355 (0.069)
	4	0.442 (0.061)	0.476 (0.065)	0.417 (0.056)	0.532 (0.072)
	5	0.426 (0.076)	0.428 (0.074)	0.375 (0.068)	0.430 (0.074)
	Weighted Mean	0.439 (0.036)	0.450 (0.039)	0.396 (0.033)	0.422 (0.035)
	pd	0.890	0.805	0.836	0.420
1 × 24HRb	1	0.164 (0.051)	0.240 (0.073)	0.156 (0.045)	0.235 (0.068)
	2	0.179 (0.040)	0.245 (0.052)	0.232 (0.047)	0.327 (0.057)
	3	0.205 (0.037)	0.279 (0.046)	0.356 (0.040)	0.405 (0.045)
	4	0.173 (0.055)	0.278 (0.089)	0.215 (0.057)	0.411 (0.102)
	5	0.186 (0.032)	0.270 (0.046)	0.226 (0.035)	0.375 (0.052)
	Weighted Mean	0.184 (0.021)	0.263 (0.031)	0.235 (0.020)	0.356 (0.027)
	p	0.955	0.970	0.055	0.279
4 × 24HRc	1	0.367 (0.094)	0.359 (0.096)	0.387 (0.118)	0.369 (0.104)
	2	0.370 (0.077)	0.353 (0.069)	0.497 (0.091)	0.479 (0.078)
	3	0.433 (0.073)	0.405 (0.063)	0.789 (0.099)	0.604 (0.061)
	4	0.344 (0.095)	0.392 (0.113)	0.459 (0.117)	0.600 (0.143)
	5	0.387 (0.057)	0.390 (0.060)	0.505 (0.072)	0.561 (0.074)
	Weighted Mean	0.384 (0.041)	0.382 (0.043)	0.534 (0.042)	0.537 (0.037)
	p	0.914	0.961	0.063	0.325

^aFood frequency questionnaire

^bSingle 24-hour recall

^cAverage of 4 repeats of a 24-hour recall

^dp-value for heterogeneity across studies