TY - JOUR T1 - Medium firm mattresses reduced pain related disability more than firm mattresses in chronic, non-specific low back pain JF - Evidence Based Medicine JO - Evid Based Med SP - 119 LP - 119 DO - 10.1136/ebm.9.4.119 VL - 9 IS - 4 A2 - , Y1 - 2004/07/01 UR - http://ebm.bmj.com/content/9/4/119.abstract N2 - Kovacs FM, Abraira V, Peña A, et al. Effect of firmness of mattress on chronic non-specific low-back pain: randomised, double-blind, controlled, multicentre trial. Lancet 2003;362:1599–604.OpenUrlCrossRefPubMedWeb of Science
 
 Q What is the effect of different firmnesses of mattresses on the clinical course of chronic, non-specific, low back pain and disability? Clinical impact ratings GP/FP/Primary care ★★★★★☆☆ IM/Ambulatory care ★★★★★★☆ Rheumatology ★★★★★★☆ Design: randomised controlled trial. Allocation: concealed.* Blinding: {patients, clinicians, data collectors, outcome assessors, data analysts, and monitoring committee}†.* Follow up period: 90 days. Setting: Spain. Patients: 313 adults who were ⩾18 years of age (73% women), had ⩾3 months of chronic low back pain, and had pain while lying in bed or on rising. Exclusion criteria: referred pain; habitual prostration; possible systemic disease, inflammatory disease, or cancer; diagnosis or suspicion of fibromyalgia; pregnancy; habitually sleeping in a different bed ⩾2 nights/week; use of anti-inflammatory medication with a 24 hour … ER -