Table 1 Uptake of screening and prevalence of chlamydia according to effort needed to secure participation
|
Groups by sex and age
|
Effort needed
|
No of people who received this form of invitation to be screened
|
No of people who responded after each form of invitation*
|
% uptake (95% CI)
|
% cumulative uptake (95% CI)
|
No of cases
|
Prevalence (95% CI)
|
P value for linear trend calculated from Wald test
|
Cumulative prevalence (95% CI)
|
All
|
Single postal invitation
|
14 382
|
3239
|
25.0 (21.7 to 28.6)
|
25.0 (21.7 to 28.6)
|
137
|
3.0 (2.3 to 3.9)
|
0.014
|
3.0 (2.3 to 3.9)
|
|
Two postal invitations
|
11 143
|
683
|
5.3 (3.9 to 7.1)
|
30.3 (26.5 to 34.3)
|
32
|
3.4 (2.1 to 5.4)
|
|
3.1 (2.3 to 4.0)
|
|
Phone call
|
10 460
|
53
|
0.5 (0.1 to 2.2)
|
30.8 (26.9 to 35.0)
|
2
|
2.0 (1.1 to 3.8)
|
|
3.0 (2.3 to 3.9)
|
|
Home visit or flagging
|
10 407
|
765
|
3.7 (2.0 to 6.8)
|
34.5 (31.2 to 38.0)
|
48
|
5.0 (3.4 to 7.2)
|
|
3.2 (2.5 to 4.2)
|
All 16-24
|
Single postal invitation
|
11 245
|
2436
|
22.2 (18.6 to 26.2)
|
22.2 (18.6 to 26.2)
|
133
|
5.4 (4.3 to 6.6)
|
0.054
|
5.4 (4.3 to 6.6)
|
|
Two postal invitations
|
8809
|
507
|
4.3 (3.0 to 6.2)
|
26.5 (22.6 to 30.8)
|
29
|
6.5 (4.7 to 8.9)
|
|
5.5 (4.6 to 6.7)
|
|
Phone call
|
8302
|
39
|
0.5 (0.1 to 2.2)
|
27.0 (22.9 to 31.5)
|
2
|
4.4 (2.8 to 6.8)
|
|
5.5 (4.6 to 6.7)
|
|
Home visit or flagging
|
8263
|
627
|
4.6 (2.0 to 10.0)
|
31.5 (28.6 to 34.6)
|
45
|
7.4 (5.5 to 9.9)
|
|
5.8 (4.9 to 6.9)
|
Men 16-24
|
Single postal invitation
|
5454
|
1017
|
18.9 (16.0 to 22.3)
|
18.9 (16.0 to 22.3)
|
46
|
5.4 (4.4 to 6.5)
|
0.768
|
5.4 (4.4 to 6.5)
|
|
Two postal invitations
|
4437
|
196
|
3.57 (2.6 to 4.9)
|
22.5 (19.3 to 26.1)
|
9
|
5.3 (2.8 to 9.8)
|
|
5.4 (4.3 to 6.6)
|
|
Phone call
|
2241
|
21
|
0.49 (0.1 to 2.5)
|
23.0 (19.6 to 26.8)
|
0
|
0.0 (0.0 to 0.1)
|
|
5.2 (4.2 to 6.5)
|
|
Home visit or flagging
|
4220
|
243
|
3.61 (1.5 to 8.3)
|
26.6 (24.0 to 29.4)
|
12
|
5.4 (3.3 to 8.8)
|
|
5.3 (4.4 to 6.3)
|
Women 16-24
|
Single postal invitation
|
5791
|
1419
|
25.3 (20.9 to 30.3)
|
25.3 (20.9 to 30.3)
|
76
|
5.3 (3.9 to 7.3)
|
0.033
|
5.3 (3.9 to 7.3)
|
|
Two postal invitations
|
4372
|
311
|
5.1 (3.4 to 7.7)
|
30.4 (25.7 to 35.6)
|
20
|
7.3 (4.8 to 11.0)
|
|
5.7 (4.3 to 7.5)
|
|
Phone call
|
4061
|
18
|
0.4 (0.1 to 2.0)
|
30.9 (26.0 to 36.2)
|
2
|
9.5 (5.8 to 15.2)
|
|
5.7 (4.4 to 7.4)
|
|
Home visit or flagging
|
4043
|
384
|
5.5 (2.5 to 11.9)
|
36.4 (33.1 to 39.8)
|
33
|
8.7 (6.8 to 11.1)
|
|
6.2 (4.9 to 7.8)
|
|
* Includes nine people who returned a consent form but no specimen.
A "flag" was attached to patients' notes. Patients attending the practice during the study period were invited again to take part if they had not already participated, declined to participate, or been confirmed not resident at their address.
