| Multivariable logistic regression (GEE)a |
| |
aOR (95% CI) |
P-value |
| Presentation year |
|
|
| Before 2010 |
1.0 |
|
| During 2010 |
1.1 (0.7, 1.8) |
0.736 |
| Seen in a clinic in London |
|
|
| No |
1.0 |
|
| Yes |
1.1 (0.7, 1.7) |
0.648 |
| Duration of symptoms |
|
|
| Week or less |
1.0 |
|
| More than a week |
0.5 (0.3, 0.8) |
0.002 |
| Unknown |
0.7 (0.4, 1.4) |
0.369 |
| Referral |
|
|
| No |
1.0 |
|
| Yes |
0.4 (0.2, 1.1) |
0.073 |
| Unknown |
0.4 (0.2, 1.2) |
0.107 |
| Location of symptoms reported |
|
|
| None |
1.0 |
|
| Only Genital |
0.4 (0.1, 1.2) |
0.118 |
| Only Rectal |
1.4 (0.6, 3.4) |
0.441 |
| Both |
0.8 (0.3, 2.0) |
0.567 |
| Unknown |
0.9 (0.3, 2.8) |
0.879 |
| Site of infection |
|
|
| Rectal |
1.0 |
|
| Genital |
1.2 (0.2, 5.5) |
0.847 |
| Both or other (throat, n=1) |
0.5 (0.1, 2.0) |
0.303 |
| Unknown |
0.6 (0.4, 1.0) |
0.053 |
| Any systemic symptom |
|
|
| No |
1.0 |
|
| Yes |
1.6 (1.0, 2.6) |
0.057 |
| Unknown |
2.0 (0.8, 5.1) |
0.157 |
| Any other STI |
|
|
| No |
1.0 |
|
| Yes |
1.1 (0.7, 1.7) |
0.601 |
| Unknown |
0.5 (0.3, 1.0) |
0.037 |
| Age |
1.0 (1.0, 1.1) |
0.099 |
| Sexuality |
|
|
| Homosexual |
1.0 |
|
| Bisexual |
0.2 (0.1, 0.6) |
0.006 |
| Number of contacts |
1.0 (1.0, 1.0) |
0.370 |
| Receptive anal intercourse |
|
|
| None reported |
1.0 |
|
| Reported protected or unknown |
1.4 (0.6, 3.3) |
0.428 |
| Unprotected |
2.7 (1.3, 5.8) |
0.010 |
| Unknown |
2.5 (0.8, 7.6) |
0.109 |
| Insertive anal intercourse |
|
|
| None reported |
1.0 |
|
| Reported protected or unknown |
0.8 (0.4, 1.6) |
0.473 |
| Unprotected |
1.2 (0.6, 2.2) |
0.668 |
| Unknown |
1.3 (0.5, 2.7) |
0.641 |
| Any oral sex |
|
|
| None reported |
1.0 |
|
| Reported some |
1.9 (0.5, 7.0) |
0.336 |
| Reported one unprotected |
1.2 (0.4, 4.0) |
0.730 |
| Reported both unprotected |
1.9 (0.9, 4.2) |
0.108 |
| Some or all unknown |
1.0 (0.4, 2.5) |
0.992 |
| Any fisting |
|
|
| No fisting reported |
1.0 |
|
| Some fisting reported |
1.9 (0.6, 6.3) |
0.297 |
| Both reported, unprotected |
3.5 (0.8, 15.5) |
0.093 |
| Some unknown |
0.9 (0.6, 1.4) |
0.777 |
a Multivariable model adjusted also for form delay (days between presentation to
the clinic and filling in the surveillance form). |
