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Table 3 Influenza vaccination rates and missed vaccination opportunities during the Year 1 randomized controlled cluster trial 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 % of Patients with ≥1 Missed Opportunities
Baseline Year 1 PP Difference Baseline Year 1 PP Difference
8/1/2012-1/31/2013 8/1/2013-1/31/2014 8/1/2012-1/31/2013 8/1/2013-1/31/2014
Pittsburgh sites
 Intervention
  B 529 49.0 50.5 1.5 79.0 76.0 -3.0
  C 2179 57.9 65.0 7.1 65.9 62.6 -3.3
  D 3224 54.6 59.3 4.7 66.1 64.1 -2.0
  E 1392 47.4 54.2 6.8 78.0 71.2 -6.8
  G 417 51.8 54.0 2.2 70.5 69.5 -1.0
  H 306 53.3 48.0 -5.3 77.8 69.9 -7.9
  F 3611 56.0 60.6 4.6 66.7 67.0 0.3
  J 603 49.1 54.7 5.6 70.7 65.7 -5.0
  K 330 23.6 30.9 7.3 91.5 89.4 -2.1
  M 595 62.0 68.1 6.1 66.9 62.2 -4.7
Total 13,186 53.7 58.7 5.0* 69.3 66.8 -2.5*
 Control
  N 2102 60.2 61.8 1.6 71.2 67.4 -3.8
  O 4324 35.3 50.9 15.6 76.5 68.9 -7.6
  R 2534 42.3 46.7 4.4 76.1 70.5 -5.6
  S 1045 35.3 36.0 0.7 83.8 81.3 -2.5
  U 2612 52.9 54.2 1.3 68.2 71.2 3.0
  W 224 61.2 75.0 13.8 66.1 53.6 -12.5
  X 1010 47.2 56.6 9.4 72.5 70.1 -2.4
  Y 3334 54.3 58.2 3.9 70.6 68.2 -2.4
Total 17,185 46.8 53.3 6.5* 73.4 69.8 -3.6*
Houston sites
 Intervention
  A 4880 43.4 47.9 4.5 79.3 78.3 -1.0
  I 8527 33.2 37.4 4.2 82.7 85.0 2.3
  L 5867 36.1 35.2 -0.9 82.0 86.2 4.2
Total 19,274 36.7 39.4 2.7* 81.6 83.7 2.1*
 Control
  P 6388 36.6 46.9 10.3 82.5 79.8 -2.7
  T 5547 32.2 40.7 8.5 82.6 79.5 -3.1
  V 8969 47.0 46.4 -0.6 73.8 76.1 2.3
Total 20,904 39.9 45.1 5.2* 78.8 78.1 -0.7*
  1. Note: PP percentage point difference between baseline and Year 1 vaccination rates and percent of patients with ≥1 missed opportunities. A decrease in missed opportunities is the desired outcome
  2. *P value is a two-sided probability from Cochran-Armitage trend test for percentage point difference between Baseline and Year 1 (P < 0.001)
  3. P value is a two-sided probability from chi-square test for percentage point difference between intervention and control groups (P < 0.001)