From the claims, we extracted individual level information regarding the date of hospitalization, length of hospital stay, the associated primary and secondary diagnostic and procedure codes (international classification of diseases), and the costs billed to Medicare.
Selected cases and controls were matched for age, location at the hospital, and date of hospitalization, presumably with the same likelihood of acquiring exogenous IR-MDRAB.
A multicenter matched case control study was performed in 7 regions of Spain from July 2009 to May 2011, with controls matched for age, hospital and date of hospitalization.
Twenty-one patients infected with ESBL-producing E. coli or Klebsiella spp. at sites other than the urinary tract were compared with 21 patients with non-ESBL infections matched for pathogen, patient age, co-morbid conditions, anatomic site of infection, hospital location, date of hospitalization, and initial antibiotics received.
One patient died in the hospital after withdrawal of life support according to the family's wishes; 4 died after discharge from the hospital (mean ± SD time to death from the date of hospitalization, 116 ± 94 [range 13 240] days).
Case and control files, consisting of a unique identification number for the township of each child and the date of hospitalization, were constructed for HIV-infected (cases) and uninfected (controls) children hospitalized with measles.
Mortality and dates of hospitalization were determined by linkage to the databases of the provincial health ministry (17, 18).
Baseline comorbidities, medications and dates of hospitalization were collected by a manual chart review of both inpatient and outpatient medical records.
Data included patient age, sex, occupation, residence, site of probable infection, contact with other HPS patients, dates of hospitalization, and outcome.
Dates of hospitalization for type 2 diabetes were obtained from the Swedish Hospital Discharge Register for years 1964 2007; this Register was started in 1964, and it reached nationwide coverage in 1987.
None of the 8 patients sharing the most common multilocus genotype stayed in the ICU over the same period of time, the time interval between the dates of hospitalization in the ICU ranging from 28 to 78 days.
