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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.