Table 1

 Pearson correlation coefficients of gonorrhoea, chlamydia, genital herpes, and genital warts incidence rates in 33 census wards of Leeds Health Authority, 1994–5*

Genital herpesC trachomatisGenital warts
*All correlations significant at p<0.01.
Gonorrhoea0.650.820.48
Genital herpes0.870.89
C trachomatis 0.79