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Table 5 Influenza vaccination rates and missed opportunities during the year 2 pre-post study by practice, intervention group and city

From: Using the 4 pillars™ practice transformation program to increase adult influenza vaccination and reduce missed opportunities in a randomized cluster trial

Site Total N % Vaccinated % Patients with ≥1 Missed Opportunities
Pre Post PP Difference Pre Post PP Difference
8/1/2013-1/31/2014 8/1/2014-1/31/2015 8/1/2013-1/31/2014 8/1/2014-1/31/2015
Pittsburgh sites
 Maintenance
  B 529 50.5 53.3 2.8 76.0 60.9 -15.1
  C 2179 65.0 63.4 -1.6 62.6 60.1 -2.5
  D 3224 59.3 61.3 2.0 64.1 61.8 -2.3
  E 1392 54.2 49.1 -5.1 71.2 73.2 2.0
  G 417 54.0 62.1 8.2 69.5 64.3 -5.2
  H 306 48.0 50.0 2.0 69.9 73.2 3.3
Total 8047 55.2 56.5 1.4* 68.9 65.6 -3.3*
 Active Intervention
  F 3611 60.6 65.3 4.7 67.0 58.7 -8.3
  J 603 54.7 54.9 0.2 65.7 65.3 -0.4
  K 330 30.9 28.2 -2.7 89.4 92.4 3.0
  M 595 68.1 79.5 11.4 62.2 52.6 -9.6
  N 2102 61.8 59.0 -2.8 67.4 65.5 -1.9
  O 4324 50.9 46.3 -4.6 68.9 68.7 -0.2
  R 2534 46.7 41.9 -4.8 70.5 73.5 3.0
  S 1045 36.0 40.1 4.1 81.3 81.4 0.1
  U 2612 54.2 58.2 4.0 71.2 62.5 -8.7
  W 224 75.0 75.9 0.9 53.6 53.6 0
  X 1010 56.6 59.9 3.3 70.1 64.0 -6.1
  Y 3334 58.2 61.8 3.6 68.2 59.8 -8.4
Total 22,324 54.5 55.9 1.44* 69.6 66.5 -3.1*
Houston sites
 Maintenance
  A 4880 47.9 48.4 0.5 78.3 79.2 0.9
  I 8527 37.4 35.3 -2.1 85.0 86.5 1.5
  L 5867 35.2 40.0 4.9 86.2 81.6 -4.6
Total 19,274 40.2 41.2 1.7* 83.2 82.4 -0.7**
 Active intervention
  P 6388 46.9 49.8 2.9 79.8 75.9 -3.9
  T 5547 40.7 46.3 5.7 79.5 73.5 -6.0
  V 8969 46.4 48.8 2.4 76.1 74.9 -1.2
Total 20,904 44.7 48.3 3.6* 78.5 74.8 -3.7*
  1. Note: PP Percentage point difference between pre (Year 1) and post (Year 2). A decrease in missed opportunities is the desired outcome
  2. *P value is a two-sided probability from Cochran-Armitage trend test for difference between pre and post intervention (P < 0.001)
  3. **P value is a two-sided probability from Cochran-Armitage trend test for difference between pre and post intervention (P < 0.05)
  4. P value is a two-sided probability from chi-square test of PP differences between intervention arms