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. 2007 Aug;83(5):400–405. doi: 10.1136/sti.2006.024554

Table 2 Key factors associated with STI diagnosis/es*,† at the study GUM clinic, by gender.

Row Crude OR (95% CI) Adjusted OR‡ (95% CI) Denominator
Men, all: 38.1% 1624
Age: p = 0.159 p = 0.102
 16–24 38.9% 1.00 1.00 604
 25–34 39.3% 1.02 (0.68–1.53) 0.99 (0.67–1.46) 603
 35+ 35.0% 0.85 (0.68–1.06) 0.73 (0.53–1.01) 414
Ethnicity: p = 0.007 p = 0.002
 Other ethnicity 36.7% 1.00 1.00 1485
 Black Caribbean 52.5% 1.91 (1.39–2.61) 2.43 (1.87–3.16) 139
Have/had symptoms: p = 0.001 p = 0.037
 No 27.2% 1.00 1.00 853
 Yes 50.1% 2.68 (2.10–3.43) 2.09 (1.09–4.00) 771
Had symptoms for <1 week: p = 0.024 p = 0.134
 No 35.5% 1.00 1.00 1475
 Yes 63.8% 3.20 (1.34–7.63) 1.80 (0.72–4.49) 149
Symptoms worsened since first contacted health professional: p = 0.001 p = 0.033
 No symptoms 26.1% 1.00 1.00 766
 Symptoms did not worsen (stayed the same or improved) 41.0% 1.96 (1.47–2.63) 0.95 (0.48–1.89) 337
 Symptoms worsened 53.7% 3.29 (2.59–4.17) 1.68 (0.93–3.05) 521
Women, all: 28.4% 1560
Age: p = 0.052 p = 0.129
 16–24 32.4% 1.00 1.00 814
 25–34 24.7% 0.68 (0.55–0.85) 0.70 (0.51–0.95) 494
 35+ 22.6% 0.61 (0.38–0.99) 0.60 (0.30–1.17) 252
Ethnicity: p = 0.020 p = 0.038
 Other ethnicity 29.0% 1.00 1.00 1488
 Black African 16.7% 0.49 (0.30–0.81) 0.52 (0.29–0.94) 72
Used/tried to use general practice before going to GUM clinic: p = 0.003 p = 0.003
 No 25.0% 1.00 1.00 1007
 Yes 34.5% 1.58 (1.35–1.85) 1.39 (1.24–1.55) 553
Symptoms improved since first contacted health professional: p = 0.024 p = 0.037
 No symptoms 18.7% 1.00 1.00 734
 Symptoms improved 32.2% 2.07 (0.94–4.56) 1.74 (0.77–3.92) 633
 Symptoms did not improve (stayed the same or worsened) 52.9% 4.88 (2.96–8.06) 3.65 (2.20–6.07) 193
Self‐treated symptoms: p = 0.090 p = 0.048
 No symptoms 20.3% 1.00 1.00 843
 Symptoms but did not self‐treat 40.1% 2.63 (1.44–4.80) 1.44 (0.84–2.47) 491
 Symptoms and self‐treated 33.2% 1.95 (1.09–3.50) 0.98 (0.53–1.84) 226

*Acute STIs are defined as infectious syphilis (KC60 codes: A1, A2), uncomplicated gonorrhoea (KC60 codes: B1, B2), complicated gonorrhoea (KC60 code: B5), chancroid/lymphogranuloma venereum (LGV)/donovanosis (KC60 codes: C1, C2 & C3); chlamydial infection (uncomplicated/complicated) (KC60 codes: C4a, C4b, C4c); uncomplicated non‐gonoccocal/non‐specific urethritis in males (KC60 code: C4h); complicated non‐gonoccocal/non‐specific infection (KC60 code: C5); herpes simplex (first attack) (KC60 code: C10a); genital warts (first attack) (KC60 code: C11a); trichomoniasis (KC60 code: C6a).

†618/1624 men and 443/1560 women were diagnosed with acute STIs at the study GUM clinic.

‡Parsimonious multivariate model identified through forward stepwise logistic regression. Odds ratios (OR) are adjusted for all variables significant in the parsimonious multivariate model. Criteria for inclusion in the multivariate model is p<0.10, except for age and ethnicity (see Methods).