Table of Contents

October 20, 2009; 151 (8)

Articles

  • Inhaled corticosteroids and long-acting β2-agonists improve chronic obstructive pulmonary disease (COPD) symptoms, but their effects on lung function and inflammation are uncertain. Lapperre and colleagues compared treatment with fluticasone for 6 months or 30 months, fluticasone and salmeterol for 30 months, or placebo in 114 steroid-naive patients who had moderate to severe COPD. They found reduced inflammatory cells in sputum and bronchial biopsies and an attenuated decrease in lung function during fluticasone treatment. Adding salmeterol did not further alter the decrease in lung function.

  • Although variations in 150 genes have been tested for their influence on bone mineral density (BMD), they have not been tested for replication in large studies that assess all common genetic variation among these genes. In this analysis of genome-wide association results from 5 large European populations, variations in only 9 of 150 genes were associated with BMD and variations in only 4 genes were associated with fractures related to low BMD.

  • Kim and associates modeled the cost-effectiveness of human papillomavirus (HPV) vaccination for women aged 35 to 45 years. Vaccination ranged from $116 950 to $381 590 per quality-adjusted life-year gained across various assumptions about how clinicians would screen for cervical cancer and HPV infection in addition to vaccination. The potential benefits of HPV vaccination for women in this age group who are screened seems, on average, to be small.

Improving Patient Care

  • Investigators compared the risk for infections that required hospital care in all 3812 patients in Denmark who underwent splenectomy from 1996 to 2005 with that in 3 groups: the general population, appendectomized patients, and unsplenectomized patients with conditions that could lead to splenectomy. Infection risk was highest in the 90 days after splenectomy. Risk was 4.6 times higher in splenectomized patients than in the general population but was only modestly higher than that in unsplenectomized patients who had conditions that can lead to splenectomy.

Reviews

  • Charged-particle radiation therapy is an alternative mode of radiation delivery for patients with cancer. This review found that published evidence about the benefits and harms of this therapy were derived mostly from small, single-group, retrospective studies. Of the 17 studies that compared treatments with or without charged particles, none reported statistically significant or important differences in overall or cancer-specific survival or in total serious adverse events.

  • Ventilation strategies to protect the lungs of patients with the acute respiratory distress syndrome (ARDS) include low tidal volume, limited airway pressures, and medium to high positive end-expiratory pressure (PEEP). This review of evidence for low tidal volume and high PEEP ventilation on mortality of patients with ARDS found that the few published trials showed mortality benefits with lower versus higher tidal volume. High PEEP did not improve mortality in unselected patients but may help patients with life-threatening hypoxemia despite other interventions.

Perspectives

  • Gillick provides an explanatory model of the health care system, drawn on an analogy with the ecosystem, to help understand why new technology is introduced in particular regions and how physicians come to use the new technology. She discusses how effective health care reform needs to consider the medical ecoculture by stimulating change at multiple levels, including the organization of physician practice, regulation, and device manufacturers, as well as reimbursement.

Editorials

  • In this issue, Richards and colleagues report an analysis of 36 000 single-nucleotide polymorphisms (SNPs) within 50 kilobase pairs of 150 genes investigated in at least 1 prior study for association with osteoporosis. They found that SNPs in most of the genes were not statistically significantly associated with BMD or fracture. Their work is an important step toward gaining a better understanding of the genetic causes of osteoporosis.

  • There is relatively little consensus on how best to evaluate new medical technology for clinical use. Terasawa and colleagues' comparative effectiveness review in this issue demonstrates the lack of good phase 3 studies evaluating proton-beam therapies. We must address important definitional, financial, and technical issues if the evaluation of radiation therapy and the general field of technology assessment is to move forward.

On Being a Patient

Letters

Medical Writings: Book Notes

Ad Libitum

Medical Notices

Summaries for Patients

ACP Journal Club