Study type

Study topic

Disease /health condition

Study type

Non-interventional study

Scope of the study

Disease epidemiology
Other

If ‘other’, further details on the scope of the study

Accuracy of electronic health data

Data collection methods

Secondary use of data
Non-interventional study

Non-interventional study design

Cohort
Cross-sectional
Study drug and medical condition

Medical condition to be studied

Ectopic pregnancy
Population studied

Short description of the study population

The study will take place within health care systems with EHR data in California.
The study population will include women enrolled in the health plans of the two systems who were age 15 to 44 years from January 1, 2009 to December 31, 2018.

Age groups

Adolescents (12 to < 18 years)
Adults (18 to < 46 years)

Special population of interest

Pregnant women

Estimated number of subjects

2000000
Study design details

Main study objective

The overall goal of this study is to assess the incidence rate of ectopic pregnancy over the last decade in a representative population of US women and potential risk factors associated with ectopic pregnancy.

Outcomes

Number of ectopic pregnancies / Person-time at risk, Risk factors for ectopic pregnancies / Accuracy of electronic health data to identify a) the diagnosis of ectopic pregnancy, b) the contraceptive method at time of diagnosis of ectopic pregnancy, c) the contraceptive method over time and d) induced abortions / Numbers of ectopic pregnancies managed surgically / Numbers of ectopic pregnancies managed medically

Data analysis plan

Descriptive analyses for all variables of interest will be presented overall and within each database for the study cohort. For categorical variables, frequencies and percentages will be presented for each level. Continuous variables will be summarized by the mean, standard deviation, minimum, maximum, median, and quartiles. For estimates, two-sided 95% confidence intervals will be calculated. The proportion of missing data will be captured for each variable. Demographic and clinical characteristics of patients experiencing the following outcomes will be presented: Ectopic pregnancies, Surgically treated, Medically treated, and Unknown/other (includes expectant management) Characteristics will include frequencies and percentages for each level of each outcome and by demographics and clinical characteristics of patients at the index date.
Documents
Study results
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