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Dive into the research topics where Lisa L. Bayer is active.

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Featured researches published by Lisa L. Bayer.


Contraception | 2012

Adolescent experience with intrauterine device insertion and use: A retrospective cohort study

Lisa L. Bayer; Jeffrey T. Jensen; Hong Li; Mark D. Nichols; Paula H. Bednarek

BACKGROUND Adolescents contribute disproportionately to the epidemic level of unintended pregnancy in the USA. Intrauterine devices (IUDs) are highly effective but underutilized in this age group. STUDY DESIGN We searched our electronic clinic database to identify females ≤ 19 years old who underwent attempted IUD insertion between January 2007 and June 2009. This retrospective cohort study primarily compared the insertion and postinsertion experiences between nulliparous and parous teens. RESULTS Of the 307 charts reviewed, the majority of subjects were white (73.4%) and nulliparous (77.5%), with a median age of 18 years (range 15-19). The vast majority (96.4%, 296/307) had a successful IUD insertion upon first attempt; all of the 11 unsuccessful IUD insertion attempts were among nulliparous teens. Follow-up was available for 56% (172/307). During the first 12 months of use, there were 2.9% (5/172) IUD expulsions and 24.4% (42/172) removals, with no differences between nulliparous and parous teens. IUD continuation at 6 months was 83.3%. Pelvic inflammatory disease was diagnosed in 4.6% (8/172) of post-IUD insertions. There were no pregnancies reported in those teens with IUD continuation, while six were reported in subjects who underwent IUD removal. Independent predictors of IUD discontinuation were a history of chronic pelvic pain or dysmenorrhea, and bleeding and/or pain complaints at any post-IUD visit. CONCLUSIONS Overall, adolescents experience minimal complications with IUD use, with similar rates of successful insertion as adults. IUD discontinuation rates were not significantly different between nulliparous and parous teens. While discontinuation was higher than reported in adults, it was lower than reported among teens using other forms of contraception.


Journal of Adolescent Health | 2013

Use of Levonorgestrel Intrauterine System for Medical Indications in Adolescents

Lisa L. Bayer; Paula J. Adams Hillard

The levonorgestrel intrauterine system (LNG-IUS) is an underused contraceptive method in adolescent populations. In addition to being a highly effective, reversible, long-acting contraception, the LNG-IUS has many noncontraceptive health benefits including reduced menstrual bleeding, decreased dysmenorrhea and pelvic pain related to endometriosis, and menstruation suppression in teens with physical or developmental disabilities. The LNG-IUS can also provide endometrial protection in teens with chronic anovulation, and may be used to treat endometrial hyperplasia and cancer. This review examines the evidence supporting the use of the LNG-IUS in adolescents for these noncontraceptive benefits.


Contraception | 2013

The price of emergency contraception in the United States: what is the cost-effectiveness of ulipristal acetate versus single-dose levonorgestrel?

Lisa L. Bayer; Alison Edelman; Aaron B. Caughey; Maria I. Rodriguez

BACKGROUND Ulipristal acetate (UPA) is a novel form of emergency contraception (EC) that appears to be more effective than the prevailing method, single-dose levonorgestrel (LNG). This study examines the cost-efficacy of UPA compared with LNG. STUDY DESIGN A decision-analytic model was developed to compare the cost-effectiveness of UPA versus LNG in preventing unintended pregnancy when taken within 120 h of unprotected intercourse. Univariate and bivariate sensitivity analyses, as well as Monte Carlo simulation and threshold analyses, were performed. RESULTS Utilizing UPA instead of LNG would result in 37,589 fewer unintended pregnancies per 4,176,572 estimated US annual EC uses (UPA 54,295 pregnancies; LNG 91,884 pregnancies) and a societal savings of


Contraception | 2014

ACIDFORM: a review of the evidence.

Lisa L. Bayer; Jeffrey T. Jensen

116.3 million annually. Cost-effectiveness acceptability curve analyses suggest a 96% probability that UPA is more cost-effective at a willingness to pay


Obstetrics & Gynecology | 2015

An evaluation of oral midazolam for anxiety and pain in first-trimester surgical abortion : a randomized controlled trial

Lisa L. Bayer; Alison Edelman; Rongwei Fu; William E. Lambert; Mark D. Nichols; Paula H. Bednarek; Kelsey Miller; Jeffrey T. Jensen

100,000 per quality-adjusted life year. CONCLUSIONS UPA is cost-effective in preventing unintended pregnancy after unprotected intercourse. Efforts should be promoted to increase access to UPA.


Contraception | 2013

[Cost-effectiveness of increased access to emergencycontraceptive pills: probably not] Response to Letter to the Editor.

Lisa L. Bayer; Alison Edelman; Aaron B. Caughey; Maria I. Rodriguez

OBJECTIVE ACIDFORM is a candidate microbicide with spermicidal properties. A large Phase 3 trial is underway, and it is anticipated that this product will be approved for contraceptive use and marketed soon in the United States. The goal of this article is to critically review the evidence supporting the properties, safety profile and different uses of ACIDFORM gel. STUDY DESIGN We searched PubMed and Medline for any published literature on ACIDFORM. RESULTS ACIDFORM is an acidifying agent that works by lowering the vaginal pH to enhance the normal vaginal defenses. In addition to strong acid-buffering properties, ACIDFORM has high bioadhesive and viscosity-retaining properties. Several Phase 1 clinical trials have demonstrated the vaginal safety of ACIDFORM used alone or in combination with a diaphragm, although dose-dependent side effects appear to be present. Studies investigating the efficacy of ACIDFORM against sexually transmitted infections (STIs) are promising, but further trials are needed. CONCLUSIONS The properties of ACIDFORM offer many advantages for use, either alone or in combination with another active ingredient, such as Tenofovir. Potential applications for ACIDFORM include use as a personal lubricant, a vaginal contraceptive (alone or with a barrier method) and a microbicidal product or as a formulation vehicle for an active ingredient. IMPLICATIONS ACIDFORM is a candidate female-controlled vaginal preparation with microbicidal and spermicidal properties. A dual protection method could prevent unwanted pregnancies and reduce the risk of STI acquisition.


Contraception | 2016

Postpartum contraception: An exploratory study of lactation consultants' knowledge and practices☆☆☆

Kathleen Dunn; Lisa L. Bayer; Sheila K. Mody

OBJECTIVE: To estimate the effect of oral midazolam on patient pain and anxiety perception during first-trimester surgical abortion. METHODS: Between May and December 2013, we conducted a randomized, double-blind, placebo-controlled trial. Patients between 6 0/7 and 10 6/7 weeks of gestation received 10 mg oral midazolam or placebo 30–60 minutes before surgical abortion. All patients received ibuprofen and a paracervical block. We powered the study (power=80%; significance level=.025) to detect a 15-mm difference in our two a priori primary outcomes of pain and anxiety with uterine aspiration on a 100-mm visual analog scale. Secondary outcomes were pain and anxiety at additional time points, memory, satisfaction, side effects, and adverse events. RESULTS: Demographics were similar between groups (placebo=62, midazolam=62). Compared with those randomized to placebo, patients who received midazolam had significantly less anxiety preoperatively (room entry: 51.4 mm compared with 34.5 mm, P<.001; positioning: 56.6 mm compared with 45.4 mm, P=.02). There was no difference in pain (P=.28) or anxiety (P=.14) during uterine aspiration or at other procedural time points. A significantly greater number of patients in the midazolam group reported partial amnesia (31/61 compared with 16/61, P=.005) and dizziness (30/61 compared with 18/61, P=.03). Controlling for baseline differences, patients who received midazolam reported more postoperative sleepiness (P<.001) and less postoperative nausea (P=.004). There was no difference in overall satisfaction (P=.88). CONCLUSION: Although oral midazolam reduces preprocedural anxiety, it does not reduce pain or anxiety with uterine aspiration during first-trimester surgical abortions. CLINICAL TRIAL REGISTRATION: ClinicalTrials.gov, www.clinicaltrials.gov, NCT01830881. LEVEL OF EVIDENCE: I


Obstetrics & Gynecology | 2017

Evaluation of Postpartum Contraceptive Plan and Actual Use [4A]

Elizabeth Vuong; Chiao An Chiu; Shaddi Habib; Sally Rafie; Sheila K. Mody; Lisa L. Bayer

We thank Raymond et al. for their interest in our recent article on the cost-effectiveness of ulipristal acetate (UPA) versus single-dose levonorgestrel (LNG) for emergency contraception (EC). We agree that no study has yet demonstrated a meaningful population-level reduction in pregnancy rates with LNG EC use even with advanced provision. However the studies provided in the response have their own significant limitations and none definitely evaluates the use of EC at a population level. Nevertheless the safety and efficacy of EC for pregnancy prevention for individual women is well established. All models have assumptions and limitations. Our decision tree model is based on the correct and timely utilization of EC. We recognize that there are additional confounding factors when EC is used in real life. For example EC has decreased efficacy among women who have further acts of unprotected intercourse in the same cycle. In addition LNG and possibly UPA appear to have decreased efficacy in women with a body mass index of >or=30 kg/m2 . These same confounders and others are present in the studies evaluating the efficacy of EC. When comparing LNG to UPA UPA will prevent significantly more pregnancies after unprotected or inadequately protected intercourse. This translates to a cost savings at the individual level and we have modeled the potential savings at the population level. We believe that over-the-counter status for UPA should be pursued as it has the potential to decrease unintended pregnancy and the associated downstream outcomes and health care costs. Reduction of unintended pregnancy is critical for both the health of individual women and society. EC is an underutilized option to reduce unintended pregnancy especially UPA. Policy changes that reduce barriers to EC use are likely to be helpful in promoting effective use. We await future well-designed studies that can examine these questions at a population level. (full-text) Copyright


Archive | 2016

Original research article Postpartum contraception: An exploratory study of lactation consultants' knowledge and practices ☆,☆☆

Kathleen Dunn; Lisa L. Bayer; Sheila K. Mody


Contraception | 2015

Postpartum contraception: an assessment of lactation consultants' knowledge and attitudes

Kathleen Dunn; Sheila K. Mody; Lisa L. Bayer

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Alison Edelman

University of Hawaii at Manoa

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Sheila K. Mody

University of California

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Kathleen Dunn

University of California

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