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. Author manuscript; available in PMC: 2018 Jul 31.
Published in final edited form as: Med Care. 2013 Jun;51(6):494–502. doi: 10.1097/MLR.0b013e31828d4d0c

TABLE 4.

Average Marginal Effects on Physical Exams for Breast Cancer Survivors After Primary Therapy From 2-part Model

Cohort 3a Cohort 3b


Marginal Effect on Receipt of
2 Physical Exams
95% CI Marginal Effect on
No. Physical Exams
95% CI
Months in medical home 0.001 −0.007, 0.008 −0.066 −0.197, 0.065
Clinical characteristics
  Comorbidity index
    Score 0 (reference category)
    Score >0 <1 −0.021 −0.056, 0.015 3.907 2.419, 5.396***
    Score ≥1§ 0.045 −0.038, 0.128 6.874 4.298, 9.450***
  Tumor stage
    Stage 0 (reference category)
    Stage 1 −0.040 −0.086, 0.006* 0.043 −1.745, 1.832
    Stage 2 −0.039 −0.092, 0.014 −1.705 −3.776, 0.366
    Stage unknown −0.013 −0.088, 0.061 −2.060 −4.901, 0.782
    Hormone receptor positive 0.052 0.014, 0.090*** 0.221 −1.357, 1.800
Sociodemographic
  Age −0.004 −0.006, −0.001*** −0.058 −0.149, 0.033
  Race
    White (reference category)
    Black −0.034 −0.072, 0.004* −2.702 −4.163, −1.240***
    Hispanic −0.052 −0.126, 0.022 −1.127 −5.110, 2.856
    Other −0.118 −0.225, −0.011** −3.254 −8.576, 2.069
    Multiple −0.049 −0.110, 0.011 −1.534 −4.224, 1.156
  Urban residence −0.047 −0.078, −0.016*** −0.843 −2.255, 0.569
  ABD classification 0.027 −0.028, 0.081 2.625 0.743, 4.507***
  BCCCP participation 0.016 −0.032, 0.064 2.371 −0.205, 4.948*
  Fully dual eligible 0.029 −0.012, 0.071 −0.191 −1.948, 1.565
  Year of diagnosis
    2003 (reference category)
    2004 −0.011 −0.048, 0.025 −0.187 −2.452, 2.078
    2005 −0.066 −0.117, −0.015** −0.318 −2.620, 1.984
    2006 −0.028 −0.071, 0.015 −1.797 −4.109, 0.515
    2007 −0.078 −0.138, −0.017** −1.765 −4.289, 0.759
Therapeutic characteristics
  Surgery type
    Both BCS and mastectomy (reference category)
    No surgery −0.040 −0.095, 0.014 −0.823 −3.206, 1.560
    Breast conserving surgery only 0.027 −0.024, 0.079 0.205 −1.778, 2.188
    Mastectomy only 0.045 −0.006, 0.096* −0.324 −2.209, 1.561
  Chemotherapy 0.067 0.022, 0.113*** 4.689 3.132, 6.247***
  Radiation 0.056 0.016, 0.095*** 1.301 −0.237, 2.839*
  Observations 612 581

Interaction term BCCCP × urban included.

***

P < 0.01,

**

P < 0.05,

*

P < 0.1.

Receipt of primary therapy within 15 mo of diagnosis.

Physical exams received within 15 mo of completion of primary therapy.

§

Comorbidity categories were combined due to small cell sizes.

ABD indicates aged/blind/disabled; BCCCP, Breast and Cervical Cancer Control Program; BCS, breast conserving surgery; CI, confidence interval.