Objectives To identify a cut point in annual surgeon volume associated with increased risk of
complications after primary elective total hip arthroplasty and to quantify any risk identified …

Background—Laboratory studies suggest that exposure to fine particulate matter (≤ 2.5 μm
in diameter)(PM2. 5) can trigger a combination of pathophysiological responses that may …

Objective: To compare the operative outcomes of early and delayed cholecystectomy for
acute cholecystitis. Background: Randomized trials comparing early to delayed …

Importance Chronic obstructive pulmonary disease (COPD), a manageable respiratory
condition, is the third leading cause of death worldwide. Knowing which prescription …

Our purpose was to evaluate the association of new benzodiazepine use relative to non-use
with adverse clinical respiratory outcomes among older adults with chronic obstructive …

Background People with comorbid mental and physical illness (PI) experience worse health,
inadequate care and increased mortality relative to those without mental illness (MI). The …

Individuals with intellectual and developmental disabilities (IDD) experience high rates of
social and health disadvantage. Planning effective services that meet the needs of this …

Background The diagnosis of COPD is made by objectively demonstrating nonreversible
airflow obstruction of the lungs. Despite this, rates of pulmonary function testing (PFT) for …

Objectives: The aim of this study was to investigate the generalizability of the association
between elective weekend surgery and increased 30-day postoperative mortality. Research …

OBJECTIVE Patients with rheumatoid arthritis (RA) are at increased risk of TB. Little is
known about the risk of nontuberculous mycobacteria (NTM) disease in these patients. We …