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Table 4 Before/after comparisons at aggregate collaborative and individual health center level

From: The health disparities cancer collaborative: a case study of practice registry measurement in a quality improvement collaborative

   Cancer screening
   Women with mammogram in last two years (age ≥42 years) Women with pap test within last three years (age ≥21) Adults appropriately screened for colorectal cancer (age ≥51)
Aggregate collaborative Before numerator 2,373 8,446 1,855
  Before denominator 10,522 20,114 7,760
  After numerator 4,508 13,898 3,307
  After denominator 13,003 24,300 11,968
  Before proportions 23% 42% 24%
  After proportions 35% 57% 28%
  Before/after chi-squared test p < 0.001 p < 0.001 p < 0.001
Individual health centers (out of 16 possible health centers) Increase in before/after counts 15/16 (94%) 16/16 (100%) 16/16 (100%)
  Increase in before/after proportions 12/16 (75%) 11/16 (69%) 14/16 (88%)
  Before/after chi-squared test significant 7/16 (44%) 6/16 (38%) 5/16 (31%)