| |
England
|
Wales
|
|---|
|
Organism/condition
|
Baseline incidence1
|
Reduction to be detected
|
Person-years
|
GP practices
|
Person-years
|
GP practices
|
|---|
|
All IID
|
19.20%
|
20%
|
2,000
|
20
|
200
|
2
|
|
Severe cases*
|
6.00%
|
20%
|
7,000
|
70
|
400
|
4
|
|
Campylobacter
|
0.87%
|
20%
|
500,000
|
5,000
|
2,400
|
24
|
|
Salmonella
|
0.22%
|
20%
|
500,000
|
5,000
|
9,500
|
95
|
|
Campylobacter+Salmonella
|
1.10%
|
20%
|
200,000
|
2,000
|
2,000
|
20
|
|
Campylobacter+Salmonella+ C. perfringens
|
1.34%
|
20%
|
100,000
|
1,000
|
1,600
|
16
|
| |
Scotland
|
Northern Ireland
|
UK
|
|
Organism/condition
|
Person-years
|
GP practices
|
Person-years
|
GP practices
|
Person-years
|
GP practices
|
|
All IID
|
200
|
2
|
65
|
1
|
2,465
|
25
|
|
Severe cases*
|
700
|
7
|
300
|
3
|
8,400
|
84
|
|
Campylobacter
|
4,200
|
42
|
1,400
|
14
|
508,000
|
508
|
|
Salmonella
|
16,400
|
164
|
5,500
|
55
|
531,400
|
532
|
|
Campylobacter+Salmonella
|
3,400
|
34
|
1,200
|
12
|
206,600
|
207
|
|
Campylobacter+Salmonella+ C. perfringens
|
2,800
|
28
|
1,000
|
10
|
106,200
|
107
|
- * Severe cases are defined as those presenting to primary care
- Note: Based on ability to detect a 20% decrease in incidence with 80% power and 95% precision. Required number of person-years and GP practices (recruiting 100 patients from each practice) by country, based on the relative populations of the 4 UK countries
