Table 4.
Relative change in positivity of Chlamydia testing during and after the campaign and by socio-demographic characteristics
| Campaign Phase | OR | (95% CI) | P value* | ||
|---|---|---|---|---|---|
|
STAGE I | |||||
|
Crude OR |
|
Pre |
1 |
|
<0.001 |
| During |
0.70 |
(0.67 to 0.71) |
|
||
| Post |
0.77 |
(0.76 to 0.79) |
|
||
|
STAGE II | |||||
|
Adjusted ORx |
|
Pre |
1 |
|
<0.001 |
| |
During |
1.18 |
(1.13 to 1.23) |
|
|
| |
Post |
1.40 |
(1.30 to 1.51) |
|
|
|
STAGE III | |||||
|
Sexx |
Male |
Pre |
1 |
|
<0.001 |
| |
During |
1.04 |
(0.99 to 1.10) |
|
|
| |
Post |
1.30 |
(1.20 to 1.41) |
|
|
|
Female |
Pre |
1 |
|
|
|
| |
During |
1.19 |
(1.14 to 1.25) |
|
|
| |
Post |
1.35 |
(1.25 to 1.46) |
|
|
|
unknown |
Pre |
1 |
|
|
|
| |
During |
1.26 |
(0.88 to 1.81) |
|
|
| |
Post |
0.85 |
(0.50 to 1.43) |
|
|
|
Age-groupx |
15-19 years |
Pre |
1 |
|
<0.001 |
| |
During |
1.10 |
(1.05 to 1.15) |
|
|
| |
Post |
1.31 |
(1.21 to 1.42) |
|
|
|
20-24 years |
Pre |
1 |
|
|
|
| |
During |
1.20 |
(1.15 to 1.26) |
|
|
| |
Post |
1.37 |
(1.27 to 1.48) |
|
|
|
Socio-economic classx |
1 (most deprived) |
Pre |
1 |
|
0.005 |
| |
During |
1.13 |
(1.08 to 1.19) |
|
|
| |
Post |
1.30 |
(1.20 to 1.41) |
|
|
|
2 |
Pre |
1 |
|
|
|
| |
During |
1.13 |
(1.07 to 1.19) |
|
|
| |
Post |
1.34 |
(1.24 to 1.46) |
|
|
|
3 |
Pre |
1 |
|
|
|
| |
During |
1.16 |
(1.10 to 1.22) |
|
|
| |
Post |
1.36 |
(1.25 to 1.48) |
|
|
|
4 |
Pre |
1 |
|
|
|
| |
During |
1.16 |
(1.09 to 1.23) |
|
|
| |
Post |
1.44 |
(1.32 to 1.57) |
|
|
|
5 (least deprived) |
Pre |
1 |
|
|
|
| |
During |
1.17 |
(1.10 to 1.25) |
|
|
| |
Post |
1.36 |
(1.24 to 1.49) |
|
|
|
unknown |
Pre |
1 |
|
|
|
| |
During |
1.06 |
(0.93 to 1.20) |
|
|
| |
Post |
0.98 |
(0.81 to 1.17) |
|
|
|
Ethnicityx |
White |
Pre |
1 |
|
<0.001 |
| |
During |
1.15 |
(1.10 to 1.20) |
|
|
| |
Post |
1.35 |
(1.25 to 1.46) |
|
|
|
Black |
Pre |
1 |
|
|
|
| |
During |
1.25 |
(1.15 to 1.35) |
|
|
| |
Post |
1.57 |
(1.41 to 1.75) |
|
|
|
Asian |
Pre |
1 |
|
|
|
| |
During |
1.25 |
(1.05 to 1.49) |
|
|
| |
Post |
1.40 |
(1.13 to 1.74) |
|
|
|
Other |
Pre |
1 |
|
|
|
| |
During |
1.25 |
(1.14 to 1.37) |
|
|
| |
Post |
1.46 |
(1.29 to 1.65) |
|
|
|
unknown |
Pre |
1 |
|
|
|
| |
During |
1.08 |
(1.03 to 1.14) |
|
|
| |
Post |
1.23 |
(1.13 to 1.33) |
|
|
|
Sexual behaviourx |
High risk |
Pre |
1 |
|
<0.001 |
| |
During |
1.21 |
(1.16 to 1.27) |
|
|
| |
Post |
1.36 |
(1.25 to 1.46) |
|
|
|
Low risk |
Pre |
1 |
|
|
|
| |
During |
1.10 |
(1.04 to 1.17) |
|
|
| |
Post |
1.42 |
(1.30 to 1.55) |
|
|
|
unknown |
Pre |
1 |
|
|
|
| |
During |
1.08 |
(1.03 to 1.13) |
|
|
| Post | 1.28 | (1.18 to 1.39) | |||
Legend OR, Odds ratio; CI, Confidence interval x adjusted for cyclical and secular trends *likelihood ratio test for interaction in stage III, phase in stages I and II.