Condition category
Urological and Genital Diseases
Date applied
Date assigned
Last edited
Retrospectively registered
Overall trial status
Recruitment status
No longer recruiting
Publication status

Plain English Summary

Not provided at time of registration

Trial website

Contact information



Primary contact

Prof Ricardo Savaris


Contact details

Rua Ramiro Barcelos
Porto Alegre

Additional identifiers

EudraCT number number

Protocol/serial number


Study information

Scientific title



Study hypothesis

1 g of azithromycin once a week for two weeks is equivalent to 14 days of 200 mg doxycycline per day.

Ethics approval

Hospital de Clinicas de Porto Alegre (HCPA) Institutional Review Board (ref: IRB0000921)

Study design

Randomized double-blinded placebo trial

Primary study design


Secondary study design

Randomised controlled trial

Trial setting

Not specified

Trial type


Patient information sheet


Pelvic inflammatory disease


Eligible patients were invited to participate in the doxycycline azithromycin protocol (DAZ). After giving written consent, a standardized interview, examination and specimen collection techniques were taken. Only three researchers will perform the physical exams. Whenever possible, the researcher that performed the first clinical examination on the first visit also did follow up on that patient.
A standardized screening examination, including a visual pain scale (0-10), and the McCormick modified pain scale was performed in the same sequence by the three researchers. A complete blood count, endometrial biopsy, urinalysis, and erythrocyte sedimentation rate will be performed on the first visit.
Endometrial samples will be divided into two equal amounts. One will be snap frozen in liquid nitrogen for Polymerase Chain Reaction (PCR) analysis and the other will be fixed in formaldehyde for histological analysis.
After the initial interview, the patient will receive a parenteral 250 mg ceftriaxone injection and will be randomly allocated to one of two treatment groups.

Randomization and treatment:
A restricted randomization sequence list was generated by computer, and was kept concealed from the researcher until the moment of assignment. We will consider subjects in blocks of four at a time to create the allocation sequence. After the patient is enrolled in the protocol, she will be blindly assigned to a coded treatment, either 14 days doxycycline or 1 g of azithromycin per week for two weeks. To avoid bias, the medication will be manipulated by the hospital pharmacy and will be put in identically coded blisters (treatment A, treatment B). To confirm compliance, a treatment of just seven days will be given to the patient, forcing her to return in seven days to receive the rest of the treatment. Because of the difference in the amount of capsules in each treatment, the azithromycin blister was filled up with placebo.
In the first visit, the patient will receive 250 mg intramuscular ceftriaxone and a blister for seven days treatment. The first dose of the medication (1 g of azythromycin, or 200 mg of doxycycline) will be taken in front of the physician. She will receive a leaflet and instructions of how she should take the rest of the medication. Special attention was taken about warning against taking the medication on an empty stomach, using analgesics, and abstaining from sexual intercourse until the treatment was completed. All women will be advised to have their partner treated with 1 g of azithromycin.

Endometrial biopsy and definition of endometritis:
The endometrial biopsy was performed at the office using a Karman plastic curette (MedGyn Products Inc., Lombard, IL, USA). Histopathological endometritis was defined by the presence of ≥1 plasma cell per X120 field in the endometrial stroma plus ≥5 neutrophils per X400 field in the endometrial surface.
PCR techniques will be used to investigate the presence of Neisseria gonorrhea and Chlamydia trachomatis in the endometrial samples.

Follow-up and adherence:
Participants will be monitored with in-person visits at 2, 7, 14 and 30 days. In each visit, the gynecological examination and the assessment of the pain will be registered. On day 7, the patient will return the first blister and receive the second one. Again, the first dose will be taken in front of the physician. On day 14, she will return the second blister. Adherence will be checked by absence of capsules in each blister. On day 30, another endometrial biopsy will be performed to measure histological cure and blood tests will be repeated.

Intervention type



Not Specified

Drug names

Ceftriane, azithromycin and doxycycline

Primary outcome measure

The primary outcome for the trial is clinical cure, defined as improvement or absence of the initial pain at day 14 compared to baseline.

Secondary outcome measures

1. A clinical cure, defined as 70% or greater reduction in the total tenderness score at day 14 compared to baseline
2. Histological cure defined as absence of plasma cell per X120 field in the endometrial stroma and <5 neutrophils per X400 field in the endometrial surface
3. Absence of Neisseria gonorrhea and Chlamydia trachomatis on endometrial samples on day 30 by PCR techniques

Overall trial start date


Overall trial end date


Reason abandoned (if study stopped)


Participant inclusion criteria

1. A history of pelvic discomfort for a period of 30 days or less
2. Findings of pelvic organ tenderness (uterine or adnexal) on bimanual examination
3. Leukorrhea and/or mucopurulent cervicitis and/or untreated known positive gonococcal or chlamydial cervicitis

Participant type


Age group




Target number of participants


Participant exclusion criteria

1. Current pregnancy as demonstrated by beta-Human Chorionic Gonadotrophin (HCG) or ultrasonography
2. Inability to tolerate an outpatient oral regimen as demonstrated by the vomiting of eight ounces of water one hour after taking 10 mg of metoclopramide
3. Presence of tubo-ovarian abscess, appendicitis or hemorrhagic ovarian cysts confirmed by ultrasound or laparoscopy
4. Pelvic pain over 30 days duration
5. Allergy to ceftriaxone, azithromycin or doxycycline
6. Antimicrobial therapy within seven days of recruitment
7. Delivery, abortion or gynecological surgery within 30 days
8. Prior hysterectomy or bilateral salpingectomy
9. Homelessness
10. Fever
11. Abdominal rebound tenderness

Recruitment start date


Recruitment end date



Countries of recruitment


Trial participating centre

Rua Ramiro Barcelos, 2350/1125
Porto Alegre

Sponsor information


Foundation for the Incentive of Research (Fundacao de Incentivo a Pesquisa) (FIPE) (Brazil)

Sponsor details

Rua Ramiro Barcelos 2350/2
Porto Alegre

Sponsor type




Funder type


Funder name

Foundation for the Incentive of Research (Fundacao de Incentivo a Pesquisa) (FIPE) (Brazil)

Alternative name(s)

Funding Body Type

Funding Body Subtype


Results and Publications

Publication and dissemination plan

Not provided at time of registration

Intention to publish date

Participant level data

Not provided at time of registration

Basic results (scientific)

Publication list

Results in:

Publication citations

  1. Results

    Savaris RF, Teixeira LM, Torres TG, Edelweiss MI, Moncada J, Schachter J, Comparing ceftriaxone plus azithromycin or doxycycline for pelvic inflammatory disease: a randomized controlled trial., Obstet Gynecol, 2007, 110, 1, 53-60, doi: 10.1097/01.AOG.0000268801.90261.27.

Additional files

Editorial Notes