Aberrant behaviors in a primary care-based cohort of patients with chronic pain identified as misusing prescription opioids.

Objective: To assess aberrant drug-related behaviors (ADRBs) in patients discharged from a community primary care practice for opioid misuse and treating physician's ability to identify predictive aberrant behaviors.

Design: Retrospective chart review of patients with chronic noncancer pain (CNCP) identified by their treating physician as misusing opioid analgesics, and patients with similar characteristics who had not been identified as misusing opioids. A survey of attending and resident physicians from these clinics on their knowledge of ADRBs was also collected.

Prediction of blood loss during surgery on the lumbar spine with the patient supported prone on the Jackson table.

Background Context: To date, many studies have examined the effects of one or several factors on blood loss during lumbar spine surgery. The nature and extent of the operation, patient position, blood pressure, and a variety of factors related to patient size have been touted as predictors of blood loss.

Purpose: To measure multiple factors implicated as determinants of blood loss and develop a multivariable statistical model capable of predicting blood loss.