Characteristics of patients abstracted from medical charts for all abortion complication cases, 2001–2010, N = 23,493.

aInformation on patient demographics was not consistently available in the medical chart. The percentages are calculated on the non-missing n.
bMissing data on the number of births increased at MH and TUTH, and declined at BDH and LZH.
cClinical evidence such as foreign body or injury from instrumentation (e.g., uterine perforation) or free-text chart documentation of induced abortion based upon patient disclosure or provider observation.