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Mechanical Symptoms and Arthroscopic Partial Meniscectomy in Patients With Degenerative Meniscus Tear: A Secondary Analysis of a Randomized Trial: Annals of Internal Medicine: Vol 164, No 7
Background: Recent evidence shows that arthroscopic partial meniscectomy (APM) offers no benefit over conservative treatment of patients with a degenerative meniscus tear. However, patients who report mechanical symptoms (sensations of knee catching or locking) may benefit from APM. Objective: To assess whether APM improves mechanical symptoms better than sham surgery. Design: Randomized, patient- and outcome assessor–blinded, sham surgery–controlled, multicenter trial. (ClinicalTrials.gov: NCT00549172) Setting: 5 orthopedic clinics in Finland. Patients: Adults (aged 35 to 65 years) with a degenerative medial meniscus tear and no knee osteoarthritis. Intervention: APM or sham surgery. Measurements: Patients' self-report of mechanical symptoms before surgery and at 2, 6, and 12 months after surgery. Results: 70 patients were randomly assigned to APM, and 76 were assigned to sham surgery. Thirty-two patients (46%) in the APM group and 37 (49%) in the sham surgery group reported catching or locking before surgery; the corresponding numbers at any follow-up were 34 (49%) and 33 (43%), with a risk difference of 0.03 (95% CI, −0.06 to 0.12). In the subgroup of 69 patients with preoperative catching or locking, the risk difference was 0.07 (CI, −0.08 to 0.22). Limitation: Analyses were post hoc, and the results are only generalizable to knee catching and occasional locking because few patients reported other types of mechanical symptoms. Conclusion: Resection of a torn meniscus has no added benefit over sham surgery to relieve knee catching or occasional locking. These findings question whether mechanical symptoms are caused by a degenerative meniscus tear and prompt caution in using patients' self-report of these symptoms as an indication for APM. Primary Funding Source: Academy of Finland.
Disclosing Pleiotropic Effects During Genetic Risk Assessment for Alzheimer Disease: A Randomized Trial: Annals of Internal Medicine: Vol 164, No 3
Background: Increasing use of genetic testing raises questions about disclosing secondary findings, including pleiotropic information. Objective: To determine the safety and behavioral effect of disclosing modest associations between apolipoprotein E (APOE) genotype and coronary artery disease (CAD) risk during APOE-based genetic risk assessments for Alzheimer disease (AD). Design: Randomized, multicenter equivalence clinical trial. (ClinicalTrials.gov: NCT00462917) Setting: 4 teaching hospitals. Participants: 257 asymptomatic adults were enrolled, 69% of whom had 1 AD-affected first-degree relative. Intervention: Disclosure of genetic risk information about AD and CAD (AD+CAD) or AD only (AD-only). Measurements: Primary outcomes were Beck Anxiety Inventory (BAI) and Center for Epidemiologic Studies Depression Scale (CES-D) scores at 12 months. Secondary outcomes were all measures at 6 weeks and 6 months and test-related distress and health behavior changes at 12 months. Results: At 12 months, mean BAI scores were 3.5 in both the AD-only and AD+CAD groups (difference, 0.0 [95% CI, −1.0 to 1.0]), and mean CES-D scores were 6.4 and 7.1 in the AD-only and AD+CAD groups, respectively (difference, 0.7 [CI, −1.0 to 2.4]). Both confidence bounds fell within the equivalence margin of ±5 points. Among carriers of the APOE ε4 allele, distress was lower in the AD+CAD groups (difference, −4.8 [CI, −8.6 to −1.0]) (P = 0.031 for the interaction between group and APOE genotype). Participants in the AD+CAD groups also reported more health behavior changes, regardless of APOE genotype. Limitations: Outcomes were self-reported by volunteers without severe anxiety, severe depression, or cognitive problems. Analyses omitted 33 randomly assigned participants. Conclusion: Disclosure of pleiotropic information did not increase anxiety or depression and may have decreased distress among persons at increased risk for 2 conditions. Providing risk modification information about CAD improved health behaviors. Findings highlight the potential benefits of disclosure of secondary genetic findings when options exist for decreasing risk. Primary Funding Source: National Human Genome Research Institute.