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Table 4 Practices: How respondents use strain typing data a

From: Prospective evaluation of a complex public health intervention: lessons from an initial and follow-up cross-sectional survey of the tuberculosis strain typing service in England

    Initial survey Follow-up survey  
    n % n % Pc
Identify clusters and links between cases 81 65.3 97 78.2 0.024
  Profession Health protection 22 78.6 25 89.3 0.275
   Physician 18 60.0 21 70.0 0.417
   Nurse 41 62.1 51 77.3 0.058
  TB incidenceb Low 34 60.7 41 73.2 0.160
   Medium 20 60.6 28 84.8 0.027
   High 27 81.8 28 84.8 0.771
Disprove clusters and links between cases 58 46.8 73 58.9 0.056
  Profession Health protection 21 75.0 24 85.7 0.313
   Physician 13 43.3 15 50.0 0.605
   Nurse 24 36.4 34 51.5 0.079
  TB incidenceb Low 27 48.2 33 58.9 0.256
   Medium 15 45.5 22 66.7 0.083
   High 16 48.5 18 54.5 0.632
Justify extended contact tracing 51 41.1 60 48.4 0.250
  Profession Health protection 16 57.1 19 67.9 0.408
   Physician 11 36.7 10 33.3 0.787
   Nurse 24 36.4 31 47.0 0.217
  TB incidenceb Low 20 35.7 25 44.6 0.335
   Medium 13 39.4 19 57.6 0.139
   High 18 54.5 16 48.5 0.632
Justify stopping contact tracing 25 20.2 38 30.6 0.058
  Profession Health protection 13 46.4 13 46.4 1
   Physician 3 10.0 5 16.7 0.448
   Nurse 9 13.6 20 30.3 0.021
  TB incidenceb Low 9 16.1 18 32.1 0.047
   Medium 8 24.2 13 39.4 0.186
   High 8 24.2 7 21.2 0.771
To provide more information 34 27.4 44 35.5 0.171
  Profession Health protection 13 46.4 10 35.7 0.415
   Physician 5 16.7 6 20.0 0.739
   Nurse 16 24.2 28 42.4 0.027
  TB incidenceb Low 15 26.8 19 33.9 0.411
   Medium 8 24.2 12 36.4 0.284
   High 11 33.3 13 39.4 0.615
  1. aWhat do you use strain typing for? (multiple selections possible) (Don’t know / Identify clusters and links between cases / Disprove clusters and links between cases / Justify extended contact tracing / Justify stopping contact tracing / To provide more information / Other (please specify)).
  2. bArea where respondents worked is defined as low, medium and high TB incidence: <10/100,000, 10-19/100,000, ≥20/100,000 population, respectively.
  3. cchi2 test for significance comparing responses from the initial and follow-up surveys.