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Table 5 Practices: the workload associated with the TB-STS for nurses and health protection staff

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

   TB incidencea Survey nb median (IQR) mean (SD) p-valuec
Nurses No. contacts screened in the last month Total Initial 57 21 (11–36) 37.1 (53.5)  
   Follow-up 55 20 (8–40) 33.9 (45.1) 0.37
  Low Initial 26 16 (6–35) 23.8 (24.8)  
   Follow-up 23 15 (6–25) 17.2 (13.8) 0.13
  Medium Initial 17 25 (14–30) 30.2 (26.2)  
   Follow-up 18 23 (15–42) 43.7 (43.7) 0.18
  High Initial 14 32.5 (14–100) 70.2 (93.3)  
   Follow-up 14 16.5 (10–80) 48.6 (58.9) 0.24
  No. hours spent on contact tracing in the last month Total Initial 55 8 (4–16) 12.0 (10.8)  
   Follow-up 52 7.5 (3.5-15.5) 16.1 (41.7) 0.24
  Low Initial 25 8 (3–14) 10.1 (10.5)  
   Follow-up 21 6 (3–15) 11.5 (14.7) 0.35
  Medium Initial 16 12 (4–23) 14.4 (11.4)  
   Follow-up 18 7.5 (4–12) 10.2 (7.8) 0.10
  High Initial 14 9 (6–15) 12.5 (10.8)  
   Follow-up 13 8 (3–16) 31.9 (81.1) 0.19
  % time spent on contact tracing Total Initial 57 20 (10–30) 24.2 (16.5)  
   Follow-up 54 20 (10–25) 21.7 (17.6) 0.22
  Low Initial 26 20 (10–25) 21.2 (16.1)  
   Follow-up 23 20 (6–25) 21.8 (19.5) 0.45
  Medium Initial 17 20 (20–30) 24.1 (13.8)  
   Follow-up 17 20 (10–25) 19.4 (10.4) 0.14
  High Initial 14 30 (15–40) 30.0 (19.7)  
   Follow-up 14 20 (10–40) 24.4 (21.7) 0.24
Health protection staff Investigations initiated because of epidemiological links Total Initial 23 0 (0–1) 0.5 (0.8)  
   Follow-up 21 1 (0–2) 2.8 (6.1) 0.04
  Low Initial 15 0 (0–1) 0.3 (0.62)  
   Follow-up 14 0.5 (0–1) 1.5 (2.3) 0.04
  Medium Initial 3 1 (0–1) 0.7 (0.7)  
   Follow-up 3 1 (1–4) 2.0 (1.7) 0.14
  High Initial 5 0 (0–1) 0.8 (1.3)  
   Follow-up 4 1.5 (0.5-15) 7.8 (13.5) 0.14
  Strain typing used to provide more information in epidemiological investigation Total Initial 22 0 (0–1) 0.6 (1)  
   Follow-up 22 1 (0–2) 1.8 (2.5) 0.03
  Low Initial 14 0 (0–1) 0.4 (0.8)  
   Follow-up 14 0.5 (0–2) 1.4 (2) 0.05
  Medium Initial 4 0.5 (0–2) 1.0 (1.4)  
   Follow-up 3 1 (0–2) 1.0 (1) 0.50
  High Initial 4 0.5 (0–2) 1.0 (1.4)  
   Follow-up 5 2 (1–3) 3.2 (4) 0.17
  Strain typing influences an epidemiological investigation Total Initial 23 0 (0–1) 0.8 (1.1)  
   Follow-up 14 0.5 (0–2) 1.2 (1.6) 0.17
  Low Initial 14 0 (0–1) 0.4 (0.8)  
   Follow-up 8 0 (0–0.5) 0.6 (1.4) 0.34
  Medium Initial 4 0.5 (0–2) 1.0 (1.4)  
   Follow-up 2 1 (0–2) 1.0 (1.4) 0.50
  High Initial 5 1 (1–3) 1.6 (1.3)  
   Follow-up 4 2 (1.5-3.5) 2.5 (1.7) 0.20
  Investigation initiated because of strain typing Total Initial 23 0 (0–2) 2.2 (6.3)  
   Follow-up 22 0 (0–1) 1.1 (2.3) 0.79
  Low Initial 14 0 (0–1) 0.4 (0.8)  
   Follow-up 14 0 (0–0) 0.5 (1.3) 0.43
  Medium Initial 4 0.5 (0–1) 0.5 (0.6)  
   Follow-up 4 0.5 (0–1.5) 0.8 (1) 0.34
  High Initial 5 4 (3–6) 8.6 (12.2)  
   Follow-up 4 1 (1–5.5) 3.3 (4.5) 0.78
  Epidemiological links identified in strain typing cluster Total Initial 22 0 (0–0) 0.4 (0.8)  
   Follow-up 20 0 (0–0) 0.4 (0.8) 0.52
  Low Initial 13 0 (0–0) 0.2 (0.6)  
   Follow-up 13 0 (0–0) 0.3 (0.9) 0.30
  Medium Initial 3 0 (0–1) 0.3 (0.6)  
   Follow-up 3 0 (0–0) 0.0 (0) 0.81
  High Initial 6 0.5 (0–1) 0.8 (1.2)  
   Follow-up 4 0.5 (0–1.5) 0.8 (1) 0.55
  % time spent on investigations Total Initial 23 1 (0–5) 2.7 (3.2)  
   Follow-up 25 5 (0–5) 7.2 (11.1) 0.04
  Low Initial 15 0 (0–5) 2.1 (3.1)  
   Follow-up 15 5 (0–12) 8.3 (13.1) 0.04
  Medium Initial 3 5 (0–5) 3.3 (2.9)  
   Follow-up 4 5 (2.5-5) 3.8 (2.5) 0.42
  High Initial 5 5 (1–5) 4.4 (3.7)  
   Follow-up 6 3.5 (0–5) 6.2 (9.5) 0.35
  1. aArea where respondents worked is defined as low, medium and high TB incidence: <10/100,000, 10-19/100,000, ≥20/100,000 population, respectively.
  2. bn is number of people who answered the question.
  3. cPaired t-test comparing initial and follow-up responses.