TABLE 1.

Prevalence of CT infection between 2002 and 2006 as determined by PCR at the SHC in Iloilo City (n = 1,484 patients)

Date of sampling	Site of sample collection	Specimen type	No. of specimens	No. of positives	C. trachomatis positivity ratea (%) by PCR (95% CI)
August 2002	Clinic	VS	194	36	18.6 (13.1-24.0)
August 2002	Clinic	CS	196	35	17.9 (12.5-23.2)
November 2002	On-siteb	VS	200	36	18.0 (12.7-23.3)
November 2002	Clinic	CS	201	38	18.9 (13.5-24.3)
February 2004	Clinic	CS	300	62	20.7 (16.1-25.2)
June 2004	Clinic	VS	137	25	18.2 (11.8-24.7)
June 2004	Clinic	CS	282	57	20.2 (15.5-24.9)
October 2005	Clinic	VS	291	93	32.0 (26.6-37.3)
March 2006	Clinic	VS	214	47	22.0 (16.4-27.5)

^aNo significant difference (P = 0.87, χ² test) in the C. trachomatis positivity rate (by PCR) over the study period was apparent with CS specimens. However, the C. trachomatis positivity rates (by PCR) with VS specimens (P = 0.0020) and with both CS and VS specimens (P = 0.0002) did show significant changes.

^bSpecimens were collected by the participants in an outreach program.