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Table 2 Logistic Regression Models for Breast, Prostate and Colorectal Cancer Test Use

From: Are U.S. cancer screening test patterns consistent with guideline recommendations with respect to the age of screening initiation?

  BREAST CANCER
(Mammography Use Within
the Last Year)
COLORECTAL CANCER
(Adherent to Guidelines Within
the Last Year)
PROSTATE CANCER
(PSA Test Use Within
the Last Year)
Variables Unadjusted Marginal Effects
(95% CI)
Adjusted
Marginal Effects
(95% CI)
Unadjusted Marginal Effects
(95% CI)
Adjusted
Marginal Effects
(95% CI)
Unadjusted Marginal Effects
(95% CI)
Adjusted
Marginal Effects
(95% CI)
Age 0.022(.019,.024)** 0.022(.020,.025)** 0.017(.013,.020)** 0.017(.013,.020)** 0.021(.018,.023)** 0.021(.018,.023)**
Guideline 0.211(0.184,.238)** 0.212(.185,.238)** 0.060(.016,.104)** 0.056(.014,.100)** 0.068(.037,.100)** 0.067(.035,.099)**
Race - White+ -   -   -  
Non-White   0.073(.055,.092)**   -0.015(-.040,.010)   0.061(.021,.071)**
Health Insurance - 0.162(.142,.183)**   0.141(.118,.164)**   0.157(.132,.182)**
Income -   -   -  
Inc. < $15000+       
Inc. $15000       
-24999   0.047(.007,.088)*   -0.020(-.068,.029)   - 0.021(-.073,.029)
Inc. $25000       
34999   0.018(-.023,.059)   -0.032(-.074,.011)   - 0.016(-.067,.035)
Inc. $35,000 plus   0.061(.028,.094)**   0.016(-.022,.054)   0.025(-.021,.071)
Inc. < $20000   -   0.006(-.039,.051)   
Inc. > $20000     -0.00(-.060,.059)   
Marital Status    -   -  
Married/partnered+       
Divorced       
Widowed   -0.007(-.028,.014)   -0.001(-.025,.023)   -0.035(-.060,-.009)
Never married   -0.05(-.096,.0002)   0.029(-.025,.084)   0.051(-.009,.110)
   -0.012(-.038,.014)   -0.008(-.040,.025)   -0.040(-.07, 01)**
Education -   -   -  
< High school+       
High school grad.   -0.006(-.046,.033)   0.093(.053,.134)**   0.055(.006,.103)*
Some college   -0.002(-.041,.038)   0.111(.072,.150)**   0.095(.043,.148)**
College grad or higher   0.018(-.022,.058)   0.148(.107,.190)**   0.108(.058,.158)**
Sample Size 69547 69547 10127 10127 50028 50028
  1. Source: Mammography and PSA data are from the 2006 BRFSS, Colorectal cancer test data are from the 2003 NHIS Adult Subsample, +Reference Category, *P < 0.05, ** P < 0.01.
  2. Notes: Estimates are marginal effects from logistic regression models. For breast cancer, the regression sample is all women ages 30-50. For colorectal cancer the regression sample is all men and women ages 40-60. For prostate cancer the regression sample is all men ages 40-60. In each of the regressions, the "guideline'' variable assumes a value of 1 if the individual is within the guideline recommended age, and zero otherwise. Someone is defined as being adherent to the colorectal cancer screening guideline if they received either a FOBT within the past year, a sigmoidoscopy within the last 5 years or a colonoscopy within the last 10 years. BRFSS and NHIS income coding is different. The differences are described in the text.