Control subjects, defined by a POC glucose ≥70 mg/dL, were matched one to one on the basis of the hospital day of hypoglycemia, age (18 30, 31 64, or 65 80 years), sex, and BMI (<18.5, 18.5 25, 25 30, or >30 kg/m).
With the use of linked administrative databases from 1996 to 2006, we established a cohort of 185,100 adults from British Columbia, Canada, with incident type 2 diabetes matched one to one with nondiabetic individuals on age, sex, and index date.
Patients with glucose levels <70 mg/dL (case subjects) were matched one to one with nonhypoglycemic control subjects on the basis of the hospital day of hypoglycemia, age, sex, and BMI.
In both studies, controls were matched one to one to cases for severity of illness using the APACHE II for the sepsis cohort and the ISS for the trauma cohort.
The case and control subjects were matched one to two for age and BMI.
Each control was matched one to one to its case according to age and time of sampling of the baseline smears and existence of normal follow-up smears matched in time of sampling to the cervical cancer biopsies.
Each centenarian was matched (one to one for females, one to two for males) to younger patients by practice, gender and calendar year in the following age-groups: 65 74, 75 79, 80 84, 85 89, 90 94, 95 to 99 years.
Patients were matched one-to-one on the basis of initial PaO2/FiO2 and on the duration of mechanical ventilation before the apnea test.
Patients were matched one-to-one on all baseline characteristics to 2,598 control patients.
