Skip to main content

Table 2 Chlamydia positivity and associations in men who have sex with men (MSM) attending MSHC 2002-2009

From: Trends in chlamydia and gonorrhea positivity among heterosexual men and men who have sex with men attending a large urban sexual health service in Australia, 2002-2009

  Urethral chlamydia Anal chlamydia
  Number tested Number positive (%) Crude OR (95% CI) Adjusted ORb(95% CI) Number tested Number positive (%) Crude OR (95% CI) Adjusted ORb(95% CI)
All MSM 7977 292 (3.70)    6237 334 (5.36)   
Year of test a
    0.95 (0.90-1.01) 0.95 (0.88-1.01)    0.98(0.93-1.03) 0.99 (0.93-1.06)
Age group
< 25 1878 72 (3.83) 1.05 (0.78-1.42) 0.93 (0.62-1.38) 1565 82 (5.24) 1.18 (0.88-1.60) 1.30 (0.89-1.90)
25-34 3062 109 (3.56) 0.97 (0.74-1.27) 1.03 (0.74-1.44) 2453 153 (6.24) 1.42 (1.10-1.85) 1.53 (1.09-2.15)
> 35 3036 111 (3.66) 1.00 1.00 2218 99 (4.46) 1.00 1.00
No. male sexual partners 12 mo
0-1 1439 53 (3.68) 1.00   824 31 (3.76) 1.00 1.00
> 1 5672 211 (3.72) 1.01 (0.74-1.37)   4635 256 (5.52) 1.50 (1.02-2.19) 1.78 (1.06-3.00)
Condom use 12 mo
always 2615 78 (2.98) 1.00 1.00 2187 85 (3.89) 1.00  
sometimes, usually, never 3363 153 (3.98) 1.55 (1.17-2.05) 1.55 (1.14-2.11) 2963 204 (6.88) 1.83 (1.41-2.37)  
No. male sexual partners 3 mo
0-1 2849 96 (3.37) 1.00 1.00 1970 86 (4.37) 1.00  
> 1 4449 177 (3.98) 1.19 (0.92-1.53) 1.40 (1.00-1.95) 3661 213 (5.82) 1.35 (1.05-1.75)  
Condom use 3 mo
always 2564 85 (3.32) 1.00   2205 93 (4.22) 1.00 1.00
sometimes, usually, never 2920 135 (4.62) 1.41 (1.07-1.86)   2590 182 (7.03) 1.72 (1.33-2.22) 1.88 (1.40-2.52)
Contact with infection or symptomatic presentation     
No 3169 61 (1.92) 1.00 1.00 2555 118 (4.62) 1.00 1.00
Yes 3008 174 (5.78) 3.13 (2.33-4.21) 2.79 (2.02-3.86) 2112 137 (6.49) 1.43 (1.11-1.85) 1.43 (1.08-1.89)
  1. a The odds ratio (OR) shows the association with chlamydia with each additional calendar year.
  2. b Adjusted for age, number of sexual partners last 12 months, condom use last 3 months and contact history or symptomatic presentation.
  3. OR = odds ratio, MSHC Melbourne Sexual Health Centre, mo = months