Table 2

Descriptive information of the sample, shown by 3-month interval of observation, stratified by city of enrolment

NortheasternMidwesternSouthernTotal
Sexual behaviours
 Interval 1*(n=203)(n=148)(n=217)(n=568)
 Mean # sex partners, 3M†2.4 (2.4) (1–3)3.9 (3.4) (2–5)3.8 (3.5) (1–5)3.3 (3.2) (1–4)
 PVI events per person dy‡ 3008/21 491 (0.14)2293/13 620 (0.17)3762/21 735 (0.17)9063/56 847 (0.16)
 Interval 2§(n=130)(n=115)(n=147)(n=392)
 Mean # sex partners, 3M†2.5 (2.6) (1–3)3.2 (3.5) (1–4)3.0 (2.7) (1–4)2.9 (3.0) (1–3)
 PVI events per person dy‡ 1893/10 885 (0.13)1884/10 441 (0.18)2260/13 492 (0.17)6037/34 788 (0.17)
Sexually Transmitted Infections
 Baseline Measurescases/n (%)cases/n (%)cases/n (%)cases/n (%)
 Combined prevalent cases19/268 (7.1)52/244 (21.3)38/265 (14.3)169/920 (18.4)
 Prevalent gonorrhoea cases0/268 (0.0)3/244 (1.2)32/408 (7.8)35/920 (3.8)
 Prevalent chlamydia cases14/268 (5.2)13/244 (5.3)49/408 (12.0)76/920 (8.3)
 Prevalent trichomonas cases5/268 (1.9)36/244 (14.8)38/408 (9.3)79/920 (8.6)
Interval 1*
 Combined incident cases9/236 (3.8)17/198 (8.5)38/265 (14.3)64/699 (9.2)
 Incident gonorrhoea cases1/236 (0.4)3/198 (1.5)6/264 (2.2)10/698 (1.4)
 Incident chlamydia cases5/236 (2.1)37/198 (3.5)21/265 (7.9)33/699 (4.7)
 Incident trichomonas cases3/236 (1.3)10/198 (5.1)19/264 (7.2)32/698 (4.6)
 Cases w/in CCC users§1/39 (2.6)2/40 (5.0)1/30 (3.3)4/109 (3.7)
 Cases w/in <CCC users¶7/164 (4.3)10/106 (9.4)25/182 (13.7)42/452 (9.3)
Interval 2§
 Combined incident cases3/164 (1.8%)14/162 (8.6%)22/186 (11.8%)39/512 (7.6)
 Incident gonorrhoea cases0/163 (0.0)1/162 (1.6)4/186 (2.2)5/512 (1.0)
 Incident chlamydia cases3/164 (1.8)3/162 (1.9)5/186 (2.7)11/512 (2.1)
 Incident trichomonas cases0/164 (0.0)11/162 (6.8)14/186 (7.5)25/512 (4.9)
 Cases w/in CCC users§0/28 (0.0)2/34 (5.9)0/21 (0.0)2/83 (2.4)
 Cases w/in <CCC users¶2/123 (1.6)10/96 (10.4)19/145 (13.1)31/364 (8.5)
  • <CCC=not reporting CCC.

  • *Data from first 3 months of the study.

  • †Data from daily diaries collected over a 3-month period.

  • ‡Total number of penile-vaginal sex events divided by total number of observation days.

  • §Data from months 4 through 6 of the study.

  • ¶CCC=Consistent and Correct Condom.