|
Denominator
|
To recruit 100 (letter only - 6.8% response)
|
To recruit 100 (letter plus follow-up telephone calls - 11.1% response)
|
---|
Activity
|
Number
|
Time (minutes)
|
Number
|
Time (minutes)
|
Number
|
Time (minutes)
|
Database searching
|
Per practice/location
|
60
|
Per practice
|
60
|
Per practice
|
60
|
Initial screening
|
To produce 200 eligible
|
60
|
1,471
|
441
|
901
|
270
|
Mailing invitations
|
200
|
240
|
1,471
|
1,765
|
901
|
1,081
|
GP screening of responses
|
1
|
2
|
100
|
200
|
100
|
200
|
Associated researcher time
|
1
|
24*
|
100
|
2,400
|
100
|
7,547
|
157**
|
- *Letter only. **Letter plus follow-up telephone call. GP: General practitioner.