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. Author manuscript; available in PMC: 2013 Apr 3.
Published in final edited form as: JAMA Intern Med. 2013 Jan 28;173(2):122–129. doi: 10.1001/2013.jamainternmed.1017

Table 4.

4 month and 12 month CRC screening, by selected variables

All 4 mo CRC screening 12 mo CRC screening
N N % p-value Test* N % p-value Test*
Race Group
      Non-White 29 2 6.9 0.57 FE 6 20.7 0.95 Chisq
      White 831 104 12.5 176 21.2
Age group
      50–54 519 68 13.1 0.60 Chisq 123 23.7 0.090 Chisq
      55–59 167 16 9.6 26 15.6
      60–64 102 14 13.7 21 20.6
      65–94 76 8 10.5 12 15.8
Marital Status
      Married/Cohab 642 81 12.6 0.49 Chisq 143 22.3 0.110 Chisq
      Single/Div/Wi 221 24 10.9 38 17.2
Education
      1:<=HS 299 29 9.7 0.23 Chisq 49 16.4 0.037 Chisq
      2:Some Coll/Votech 242 32 13.2 0.10 C-A Trend 54 22.3 0.013 C-A Trend
      3:Coll Grad/Post Coll 321 45 14.0 79 24.6
Employment
      1:Full Time 463 62 13.4 0.28 Chisq 104 22.5 0.46 Chisq
      2:Part Time 122 12 9.8 26 21.3
      3:Retiree 123 17 13.8 25 20.3
      4:Unemployed 101 13 12.9 21 20.8
      5:Dsbld/Stdnt 53 2 3.8 6 11.3
Annual HH Income
      <=$15K 46 1 2.2 0.14 Chisq 3 6.5 0.0045 Chisq
      $15K–$30K 104 9 8.7 0.028 C-A Trend 16 15.4 0.0002 C-A Trend
      $30K–$45K 97 9 9.3 (omitting
'do not
wish to
answer')		 11 11.3 (omitting
'do not
wish to
answer')
      $45K–$60K 118 20 16.9 28 23.7
      $60K–$75K 78 11 14.1 18 23.1
      $75K+ 195 26 13.3 51 26.2
      Do not wish to answer 197 27 13.7 49 24.9
Never Had Mammogram
      Did not check(indicate) 836 102 12.2 0.77 FE 176 21.1 0.96 Chisq
      Checked "never had a mammogram" 29 4 13.8 6 20.7
Mammogram in previous year?
      Yes 628 83 13.2 0.19 Chisq 141 22.5 0.13 Chisq
      No 232 23 9.9 41 17.7
Ever been diagnosed with cancer?
      Yes 106 10 9.4 0.34 Chisq 24 22.6 0.67 Chisq
      No 759 96 12.6 158 20.8
In past, have your MDs recommended CRC screen?
      Missing (before Question) 366 61 16.7 0.0018 Chisq 98 26.8 0.0018 Chisq
      Yes 266 28 10.5 46 17.3
      No 233 17 7.3 38 16.3
Stage of Change
      Up to date with screening 9 1 11.1 0.0038 Chisq 3 33.3 <0.0001 Chisq
      Plan next 30 days 62 13 21.0 0.0003 C-A Trend 18 29.0 <0.0001 C-A Trend
      Plan next 6 months 235 40 17.0 72 30.6
      Not sure/no plan 464 47 10.1 80 17.2
      Not thinking about it 94 5 5.3 9 9.6
Knowledge Score (post hoc groups)
      Low 4–7 127 9 7.1 0.054 Chisq 18 14.2 0.039 Chisq
      High 8–10 737 97 13.2 164 22.3
*

Tests:

Chisq = chi-square test

FE = Fisher’s Exact test

C-A Trend = Cochran Armitage trend test