Abstract：
:Case-control studies begin at the end. Two groups of patients, those with disease (cases) and those without (controls), are compared to determine the degree of exposure to a presumed risk factor. This research method is commonly used to study rare diseases or diseases that take years to develop. If a higher proportion of cases than controls has the exposure of interest, the exposure may be associated with illness. The strength of this association is measured by an "odds ratio," which is a good proxy for a relative risk when the illness in question is infrequent. Although some case-control studies are easy to do, all are easy to do poorly, especially because of selection bias in the choice of controls. A greater familiarity with the case-control study should enable obstetrician-gynecologists to evaluate critically published studies using this research method.
journal_name
Obstet Gynecoljournal_title
Obstetrics and gynecologyauthors
Peipert JF,Grimes DAsubject
Has Abstractpub_date
1994-07-01 00:00:00pages
140-5issue
1eissn
0029-7844issn
1873-233Xjournal_volume
84pub_type
杂志文章,评审abstract：OBJECTIVE:To describe the human papillomavirus (HPV) genotype distribution in invasive vaginal cancers diagnosed before the introduction of the HPV vaccine and evaluate if survival differed by HPV status. METHODS:Four population-based registries and three residual tissue repositories provided formalin-fixed, paraffin-...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：10.1097/AOG.0000000000000171
更新日期：2014-04-01 00:00:00
abstract：BACKGROUND:With the rising rate of cesarean deliveries, the rate of placenta previa and placenta percreta will rise concomitantly resulting in a greater incidence of severe complications. CASE:This case report describes a pregnancy with a massive intra-abdominal bleeding due to placenta percreta at 14 weeks of gestati...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：10.1097/01.AOG.0000254168.73160.21
更新日期：2007-02-01 00:00:00
abstract：:Seizure disorders frequently are diagnosed and managed during adolescence; therefore, obstetrician-gynecologists who care for adolescents should be familiar with epilepsy and other seizure disorders, as well as antiepileptic drugs. Patients diagnosed with seizure disorders during childhood may have increased seizure a...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：10.1097/AOG.0000000000003828
更新日期：2020-05-01 00:00:00
abstract：:Women who do not have a documented germline mutation or who do not have a strong family history suspicious for a germline mutation are considered to be at average risk of ovarian cancer. Women who have confirmed deleterious BRCA1 and BRCA2 germline mutations are high risk of ovarian cancer. In addition, women who have...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章,评审
doi：10.1097/AOG.0b013e3181ec5fc1
更新日期：2010-09-01 00:00:00
abstract：OBJECTIVE:To determine whether maternal midtrimester serum N-terminal peptide of proatrial natriuretic peptide, free beta subunit of human chorionic gonadotropin (hCGbeta), or alpha-fetoprotein (AFP) levels can predict preeclampsia. METHODS:A population-based cohort included 1037 nulliparous women, of whom 637 (61%) p...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0029-7844(98)00112-4
更新日期：1998-06-01 00:00:00
abstract：:A day in obstetric-gynecologic practice in Kenya involves uterine rupture and other conditions resulting from inadequate care and facilities for labor, as well as infected abortions. Technology and equipment taken for granted in America either don't exist or don't work. Although practice is primitive in many ways, som...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：
更新日期：1990-07-01 00:00:00
abstract：:Forty-three women who had undergone a natural or surgical menopause were randomized to receive either 0.625 mg of conjugated estrogens or an intramuscular injection of 150 mg of depo-medroxyprogesterone acetate (DMPA) for 25 days each month. Vasomotor symptoms were recorded before treatment for three weeks and weekly ...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：
更新日期：1984-01-01 00:00:00
abstract：OBJECTIVE:To identify potential predictors for treatment success in medical management with misoprostol for early pregnancy failure. METHODS:We conducted a planned secondary analysis of data from a multicenter trial that compared medical and surgical management of early pregnancy failure. Medical management consisted ...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章,多中心研究,随机对照试验
doi：10.1097/01.AOG.0000206737.68709.3e
更新日期：2006-04-01 00:00:00
abstract：:A retrospective review of placental material derived primarily from preterm deliveries was conducted and inflammatory changes graded on a scale of 0-3. Reviewers were blind as to the clinical outcomes. Other reviewers, unaware of the pathologic results, surveyed the clinical data, and results were combined for analysi...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：
更新日期：1987-12-01 00:00:00
abstract：OBJECTIVE:To evaluate the efficacy of an integrated multiple risk intervention, delivered mainly during pregnancy, in reducing such risks (cigarette smoking, environmental tobacco smoke exposure, depression, and intimate partner violence) postpartum. METHODS:Data from this randomized controlled trial were collected pr...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章,多中心研究,随机对照试验
doi：10.1097/AOG.0b013e3181834b10
更新日期：2008-09-01 00:00:00
abstract：:The CO2 laser has become a valuable tool for the treatment of lower genital tract neoplasia. The records of 52 women who underwent CO2 laser cervical conization were analyzed retrospectively to evaluate the effect of tissue thermal damage on histopathologic interpretation. Lesion evaluability, defined by the ability t...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：
更新日期：1992-05-01 00:00:00
abstract：:Combination chemotherapy has dramatically improved the results of treatment for embryonal rhabdomyosarcoma of the vagina in children, but little attention has been directed toward vaginal sarcomas in adults. This report of 17 cases of primary sarcoma of the adult vagina includes ten leiomyosarcomas, four mixed mesoder...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：
更新日期：1985-05-01 00:00:00
abstract：OBJECTIVE:To determine the prevalence, magnitude, and type of fetal acidemia associated with contemporary obstetric anesthetic techniques. METHODS:Umbilical artery blood gases were obtained in 1601 singleton pregnancies delivered by elective cesarean. RESULTS:General anesthesia was used in 371 (23%) women, epidural i...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0029-7844(94)p4401-9
更新日期：1995-01-01 00:00:00
abstract：:Patients with a laparoscopically verified first episode of acute salpingitis were offered a second-look laparoscopy to determine the effectiveness of the treatment regimen in terms of anatomic end result as well as to correlate the anatomic end result with future fertility. Until now, 13 women have been subjected to s...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：
更新日期：1983-06-01 00:00:00
abstract：:Cytologic diagnosis of adenocarcinoma metastatic to the peritoneal surface is often hampered by the difficulty of differentiating between reactive mesothelial cells and macrophages from malignant epithelial cells by light microscopy. With in vitro tissue culture technics, the fibroblastic dedifferentiation of mesothel...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：10.1097/00006250-197507000-00015
更新日期：1975-07-01 00:00:00
abstract：OBJECTIVE:To determine whether obstetric admissions to the intensive care unit (ICU) are useful quality-assurance indicators. METHODS:We analyzed retrospectively obstetric ICU admissions at two tertiary care centers from 1991 to 1997. RESULTS:The 131 obstetric admissions represented 0.3% of all deliveries. The majori...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0029-7844(99)00274-4
更新日期：1999-08-01 00:00:00
abstract：:This study reports serum levels of relaxin in normal and special-interest pregnancies using an homologous radioimmunoassay for human relaxin. The mean levels in uncomplicated antenatal patients were lower than those reported in studies using heterologous assays, but the trend in serum levels was similar. Serum levels ...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：
更新日期：1987-04-01 00:00:00
abstract：:The origin of mucinous and ciliated cells in the vulva and the pathogenesis of cysts lined by these epithelia were investigated. Small mucinous glands numbering from one to more than a hundred were encountered in 9 of 19 vulvas (53%) that were consecutively examined at autopsy. Eleven other cysts were encountered clin...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：10.1097/00006250-197803000-00020
更新日期：1978-03-01 00:00:00
abstract：OBJECTIVE:To estimate unintended pregnancies averted and the cost effectiveness of pharmacist prescription of hormonal contraception. METHODS:A decision-analytic model was developed to determine the cost effectiveness of expanding the scope of pharmacists to prescribe hormonal contraception compared with the standard ...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：10.1097/AOG.0000000000003265
更新日期：2019-06-01 00:00:00
abstract：:Marketing of genetic testing, although similar to direct-to-consumer advertising of prescription drugs, raises additional concerns and considerations. These include issues of limited knowledge among patients and health care providers of available genetic tests, difficulty in interpretation of genetic testing results, ...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章,实务指引
doi：10.1097/AOG.0b013e31817d250e
更新日期：2008-06-01 00:00:00
abstract：:A case report is presented of an ampullary ectopic pregnancy which was treated by salpingostomy. Twenty-six days later, the patient underwent repeat operation due to the persistence of trophoblastic tissue within the fallopian tube. A review of the English literature reveals nine cases including our own that have been...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：
更新日期：1987-03-01 00:00:00
abstract：:We compared the performance of Testpack Chlamydia to tissue culture isolation for detection of endocervical chlamydia in an obstetric clinic population at high risk for infection. Among 227 evaluable patients, 30 tissue culture-confirmed chlamydial infections were found (13.2%). The sensitivity, specificity, and posit...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：
更新日期：1991-05-01 00:00:00
abstract：OBJECTIVE:To determine if pregnancy intendedness is associated with physical violence, and to identify factors that modify this association. METHODS:Three to 6 months after delivery, we mailed a questionnaire to a population-based sample of 12,612 mothers of infants born during 1990 and 1991 in four states. We used mu...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0029-7844(95)00057-x
更新日期：1995-06-01 00:00:00
abstract：:Use of a scalp electrode facilitates and adds precision to electronic fetal monitoring. We report an instance of neonatal osteomyelitis due to infection of the electrode insertion site. Electrode-associated soft and bony tissue infections are most commonly mediated by cervicovaginal microflora and appear clinically an...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：
更新日期：1989-03-01 00:00:00
abstract：OBJECTIVE:To determine if the signs and symptoms of genital herpes in pregnancy accurately identify primary genital herpes infections using serologic testing for final classification. METHODS:Twenty-three women with clinical signs and symptoms suggestive of primary genital herpes infections in the second and third tri...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0029-7844(97)00121-x
更新日期：1997-06-01 00:00:00
abstract：BACKGROUND:Pelvic vein thrombosis may occur in nonpuerperal patients with hypercoagulable conditions and have significant sequelae. The purpose of this report is to describe a nonpuerperal woman with factor V Leiden mutation who developed acute pelvic pain secondary to pelvic varix thrombosis. CASE:A multiparous woman...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0029-7844(01)01589-7
更新日期：2002-05-01 00:00:00
abstract：OBJECTIVE:To evaluate the effect of delaying colposcopy in women with negative Papanicolaou smears and positive speculoscopy results. METHODS:This was a prospective study of asymptomatic women ages 13-60 years, regularly scheduled for pelvic examinations. All women had Papanicolaou smears and magnified visual examinat...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0029-7844(99)00515-3
更新日期：2000-03-01 00:00:00
abstract：:Endometriosis of the sciatic nerve is rare but must be included in the differential diagnosis of sciatic pain. Patients present with typical signs and symptoms of sciatica, which are cyclic in nature. Electromyography and computed tomographic scanning are useful in diagnosis. At laparoscopy or laparotomy, a characteri...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章,评审
doi：
更新日期：1988-03-01 00:00:00
abstract：OBJECTIVE:To test the hypothesis that increasing the intravenous fluid bolus volume at the time of epidural placement in women with narrow pulse pressure would reduce postepidural fetal heart rate (FHR) abnormalities, hypotension, and resuscitative obstetric interventions. METHODS:We performed a single-center randomiz...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章,随机对照试验
doi：10.1097/AOG.0000000000002326
更新日期：2017-12-01 00:00:00
abstract：OBJECTIVE:We reviewed the perinatal clinical course of prenatally diagnosed pulmonary sequestrations to determine the natural history of this anomaly. METHODS:From January 1992 to August 1998, 192 women were referred to the University of California, San Francisco, Fetal Treatment Center because obstetric ultrasound ha...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0029-7844(99)00420-2
更新日期：1999-10-01 00:00:00
