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Predictors of chlamydial infection and gonorrhea among patients seen by private practitioners.
CMAJ 1991; 144(6):713-21CMAJ

Abstract

OBJECTIVE

To identify the predictors of chlamydial infection and gonorrhea among patients tested by general practitioners.

DESIGN

Prospective study.

SETTING

General private practice, family planning and abortion clinic, adolescent clinic, sexually transmitted disease (STD) clinic and community health clinic in downtown Montreal.

PATIENTS

The 2856 patients were included because of symptoms compatible with an STD, a history of sexual contact with a person known or suspected to have chlamydial infection, a history of a nonexclusive sexual relationship or presentation for an abortion.

MEASURES

Patient information was obtained by the attending physician on a standard form. Enzyme immunoassay (EIA) for Chlamydia trachomatis and culture for Neisseria gonorrhoeae were performed on cervical (female) or urethral (male) samples. Stepwise logistic regression was used to identify the predictors of infection.

RESULTS

The EIA results were positive in 11.1% of the cases and the culture results in 2.3%. Among the males chlamydial infection was independently associated with low age (odds ratio [OR] = 0.88 per year), heterosexuality (OR = 4.99), urethral discharge (OR = 3.74) and the absence of a history of gonorrhea (OR = 0.51). Gonorrhea was associated with urethral discharge (OR = 24.3) and homosexuality (OR = 3.68). Among the females chlamydial infection was associated with low age (OR = 0.79 per year), a history of sexual contact with a person known to have chlamydial infection (OR = 2.30), multiple sexual partners in the previous 12 months (OR = 1.60) and a reason for the test other than screening purposes (OR = 0.60). Gonorrhea was associated with a reason other than screening (OR = 0.24) and low age (OR = 0.74 per year). Among the patients tested for screening purposes age was the only significant predictor of chlamydial infection (OR = 0.79 per year), and the prevalence of gonorrhea was 0.4%. The actual rate of chlamydial infection was 11.8% among the patients younger than 25 years, 5.7% among those 25 to 34 years and 0.6% among those over 34.

CONCLUSIONS

Age alone can be used as a criterion to screen for chlamydial infection among asymptomatic patients without a history of sexual contact with a person known or suspected to have such infection and with a history of a nonexclusive relationship. The prevalence in our population justifies screening people up to 34 years of age.

Authors+Show Affiliations

Service de microbiologie et de maladies infectieuses, Hôpital Saint-Luc, Montréal.No affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

1900212

Citation

Vincelette, J, et al. "Predictors of Chlamydial Infection and Gonorrhea Among Patients Seen By Private Practitioners." CMAJ : Canadian Medical Association Journal = Journal De l'Association Medicale Canadienne, vol. 144, no. 6, 1991, pp. 713-21.
Vincelette J, Baril JG, Allard R. Predictors of chlamydial infection and gonorrhea among patients seen by private practitioners. CMAJ. 1991;144(6):713-21.
Vincelette, J., Baril, J. G., & Allard, R. (1991). Predictors of chlamydial infection and gonorrhea among patients seen by private practitioners. CMAJ : Canadian Medical Association Journal = Journal De l'Association Medicale Canadienne, 144(6), pp. 713-21.
Vincelette J, Baril JG, Allard R. Predictors of Chlamydial Infection and Gonorrhea Among Patients Seen By Private Practitioners. CMAJ. 1991 Mar 15;144(6):713-21. PubMed PMID: 1900212.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Predictors of chlamydial infection and gonorrhea among patients seen by private practitioners. AU - Vincelette,J, AU - Baril,J G, AU - Allard,R, PY - 1991/3/15/pubmed PY - 1991/3/15/medline PY - 1991/3/15/entrez SP - 713 EP - 21 JF - CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne JO - CMAJ VL - 144 IS - 6 N2 - OBJECTIVE: To identify the predictors of chlamydial infection and gonorrhea among patients tested by general practitioners. DESIGN: Prospective study. SETTING: General private practice, family planning and abortion clinic, adolescent clinic, sexually transmitted disease (STD) clinic and community health clinic in downtown Montreal. PATIENTS: The 2856 patients were included because of symptoms compatible with an STD, a history of sexual contact with a person known or suspected to have chlamydial infection, a history of a nonexclusive sexual relationship or presentation for an abortion. MEASURES: Patient information was obtained by the attending physician on a standard form. Enzyme immunoassay (EIA) for Chlamydia trachomatis and culture for Neisseria gonorrhoeae were performed on cervical (female) or urethral (male) samples. Stepwise logistic regression was used to identify the predictors of infection. RESULTS: The EIA results were positive in 11.1% of the cases and the culture results in 2.3%. Among the males chlamydial infection was independently associated with low age (odds ratio [OR] = 0.88 per year), heterosexuality (OR = 4.99), urethral discharge (OR = 3.74) and the absence of a history of gonorrhea (OR = 0.51). Gonorrhea was associated with urethral discharge (OR = 24.3) and homosexuality (OR = 3.68). Among the females chlamydial infection was associated with low age (OR = 0.79 per year), a history of sexual contact with a person known to have chlamydial infection (OR = 2.30), multiple sexual partners in the previous 12 months (OR = 1.60) and a reason for the test other than screening purposes (OR = 0.60). Gonorrhea was associated with a reason other than screening (OR = 0.24) and low age (OR = 0.74 per year). Among the patients tested for screening purposes age was the only significant predictor of chlamydial infection (OR = 0.79 per year), and the prevalence of gonorrhea was 0.4%. The actual rate of chlamydial infection was 11.8% among the patients younger than 25 years, 5.7% among those 25 to 34 years and 0.6% among those over 34. CONCLUSIONS: Age alone can be used as a criterion to screen for chlamydial infection among asymptomatic patients without a history of sexual contact with a person known or suspected to have such infection and with a history of a nonexclusive relationship. The prevalence in our population justifies screening people up to 34 years of age. SN - 0820-3946 UR - https://www.unboundmedicine.com/medline/citation/1900212/Predictors_of_chlamydial_infection_and_gonorrhea_among_patients_seen_by_private_practitioners_ L2 - https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/1900212/ DB - PRIME DP - Unbound Medicine ER -