Skip to main content

Table 5 Energy, regression of log(biomarker) on log(self-report) and other predictors in NPAAS (n = 450) and R 2

From: Factors relating to eating style, social desirability, body image and eating meals at home increase the precision of calibration equations correcting self-report measures of diet using recovery biomarkers: findings from the Women’s Health Initiative

 

Food frequency questionnaire (FFQ)

4 day food record

24 hour dietary recall

Variable

β

SE

R2

β

SE

R2

β

SE

R2

Intercept

7.6551*

0.029

 

7.6260*

0.028

 

7.6397*

0.028

 

Log(FFQ- Calories-C)

0.0459*

0.018

3.624

0.1559*

0.029

8.381

0.0921*

0.027

3.056

BMI-C

0.0136*

0.002

27.847

0.0136*

0.001

27.729

0.0137*

0.001

29.497

Age-C

-0.0092*

0.001

9.485

-0.0089*

0.001

8.257

-0.0089*

0.001

8.786

Race:

  

1.405

  

1.420

  

1.441

Black

-0.0298

0.021

 

-0.0292

0.020

 

-0.0303

0.020

 

Hispanic

-0.0609*

0.023

 

-0.0604*

0.022

 

-0.0595*

0.022

 

Other

-0.0448

0.040

 

-0.0401

0.039

 

-0.0413

0.040

 

Meals at home:

  

0.628

  

0.282

  

0.364

Med

-0.0332

0.017

 

-0.0212

0.017

 

-0.0239

0.017

 

High

-0.0151

0.018

 

-0.0041

0.018

 

-0.0054

0.018

 

Body Image:

  

0.375

  

0.369

  

0.356

Med

-0.0275

0.021

 

-0.0283

0.021

 

-0.0267

0.021

 

High

-0.0528

0.035

 

-0.0499

0.034

 

-0.0504

0.034

 

TFEQ-R18:

         

Restraint:

  

0.337

  

0.302

  

0.237

Med

0.0251

0.017

 

0.0231

0.016

 

0.0207

0.016

 

High

0.0295

0.020

 

0.0312

0.019

 

0.0267

0.020

 

Unc. Eat.:

  

0.795

  

0.666

  

0.819

Med

-0.0286

0.019

 

-0.0256

0.018

 

-0.0289

0.018

 

High

-0.0296

0.022

 

-0.0257

0.021

 

-0.0298

0.021

 

Emo. Eat.:

  

0.328

  

0.428

  

0.372

Med

0.0087

0.019

 

0.0123

0.018

 

0.0121

0.018

 

High

-0.0217

0.025

 

-0.0217

0.025

 

-0.0185

0.025

 

Social Desirability:

  

0.075

  

0.124

  

0.155

Med

0.0117

0.017

 

0.0147

0.017

 

0.0160

0.017

 

High

0.0026

0.019

 

0.0019

0.018

 

0.0021

0.018

 

Total1

  

44.897

  

47.959

  

45.084

  1. BMI, body mass index.
  2. *β Coefficient differs from zero at p = 0.05 significance level.
  3. 1Total – percent of variation explained by all variables. R2 values for specific variables arise from analyses with only these regression variables, with subsequent rescaling so that these R2 values add to the total regression R2. R2 values for race/ethnicity pertain to comparisons among the four groups (white, black, Hispanic, other minority).
  4. Suffix C (e.g. BMI-C) = Centered values; for psychosocial & meals at home variables: medium and high are compared to low.