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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