Characteristics of the Children and Adolescents Included in the Children’s Likelihood of Thrombosis Trial
hospital-acquired venous thromboembolism
HOLIDAYS
Abbreviations: HA-VTE, hospital-acquired venous thromboembolism; MCHC, mean corpuscular hemoglobin concentration; RDW, red blood cell distribution width.SI conversion factors: To convert lactate to milligrams per deciliter, divide by 0.111; to convert MCHC to grams per liter, multiply by 10.Includes all admissions during the study period.Included as an input to the prognostic model for hospital-acquired venous thromboembolism.Reported by patients and recorded in the electronic medical record.Includes American Indian and Native Hawaiian.Not recorded in electronic medical record.Weekend admission defined as admission occurring at any time on a Friday, Saturday, or Sunday. Non–weekend holidays were Christmas, Thanksgiving, and New Year’s Day.Unknown for 11 338 patients (65.1%). For calculation of the predicted probability of hospital-acquired venous thromboembolism, unknown values were replaced with the value 1.3 mmol/L.Unknown for 5292 patients (30.4%). For calculation of the predicted probability of hospital-acquired venous thromboembolism, unknown values were replaced with the value 34.0 g/dL.Unknown for 5301 patients (30.4%). For calculation of the predicted probability of hospital-acquired venous thromboembolism, unknown values were replaced with the value 14.3%.Among 8710 hospitalizations in the control group, 58 (0.7%) experienced HA-VTE; among the 8717 hospitalizations in the intervention group, 77 (0.9%) experienced HA-VTE (risk difference, 2.2 per 1000 patients, 95% CI, −0.4 to 4.8 per 100 patients, 