A Researcher Performs a Study in Which Data Are Obtained

A researcher performs a study in which data are obtained from 10 years of notes made by physicians and nurse practitioners in a large, shared urban obstetrical practice. The researcher collects the following data: primary person providing health care, person attending the delivery, patient's age, patient's parity, patient zip code, baby's Apgar scores, gestational age at first appointment, gestational age at delivery, and maternal complications. What type of research could this be?

A) Geographical analysis
B) Outcomes research
C) Qualitative research
D) Mixed methods research
E) Quantitative research
F) Prospective research
G) Retrospective research
H) Practice pattern profiling